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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0212124 | Sergio M. C. V. Goncalves | Sergio M. C. V. Goncalves | Relativistic shells: Dynamics, horizons, and shell crossing | 25 pages, revtex4, 4 eps figs; published in Phys. Rev. D | Phys.Rev. D66 (2002) 084021 | 10.1103/PhysRevD.66.084021 | null | gr-qc | null | We consider the dynamics of timelike spherical thin matter shells in vacuum.
A general formalism for thin shells matching two arbitrary spherical spacetimes
is derived, and subsequently specialized to the vacuum case. We first examine
the relative motion of two dust shells by focusing on the dynamics of the
exterior ... | [
{
"created": "Mon, 30 Dec 2002 17:54:13 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Goncalves",
"Sergio M. C. V.",
""
]
] | We consider the dynamics of timelike spherical thin matter shells in vacuum. A general formalism for thin shells matching two arbitrary spherical spacetimes is derived, and subsequently specialized to the vacuum case. We first examine the relative motion of two dust shells by focusing on the dynamics of the exterior sh... |
gr-qc/0701043 | Luca Baiotti | Luca Baiotti, Ian Hawke, Luciano Rezzolla | On the gravitational radiation from the collapse of neutron stars to
rotating black holes | 21 pages, 10 figures; submitted to Classical and Quantum Gravity's
special issue on numerical relativity, proceeding of the NFNR conference,
Potsdam 2006 | Class.Quant.Grav.24:S187-S206,2007 | 10.1088/0264-9381/24/12/S13 | null | gr-qc | null | We provide details and present additional results on the numerical study of
the gravitational-wave emission from the collapse of neutron stars to rotating
black holes in three dimensions. More specifically, we concentrate on the
advantages and disadvantages of the use of the excision technique and on how
alternative ... | [
{
"created": "Sat, 6 Jan 2007 17:22:29 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Baiotti",
"Luca",
""
],
[
"Hawke",
"Ian",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | We provide details and present additional results on the numerical study of the gravitational-wave emission from the collapse of neutron stars to rotating black holes in three dimensions. More specifically, we concentrate on the advantages and disadvantages of the use of the excision technique and on how alternative ap... |
1009.5084 | Surajit Chattopadhyay | Surajit Chattopadhyay (Pailan College of Management and Technology)
and Ujjal Debnath (Bengal Engineering and Science University) | Correspondence between Ricci and other dark energies | 8 pages | Int.J.Theor.Phys.50:315-324,2011 | 10.1007/s10773-010-0527-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Purpose of the present paper is to view the correspondence between Ricci and
other dark energies. We have considered the Ricci dark energy in presence of
dark matter in non-interacting situation. Subsequently, we have derived the
pressure and energy density for Ricci dark energy. The equation of state
parameter has b... | [
{
"created": "Sun, 26 Sep 2010 11:37:36 GMT",
"version": "v1"
}
] | 2011-01-13 | [
[
"Chattopadhyay",
"Surajit",
"",
"Pailan College of Management and Technology"
],
[
"Debnath",
"Ujjal",
"",
"Bengal Engineering and Science University"
]
] | Purpose of the present paper is to view the correspondence between Ricci and other dark energies. We have considered the Ricci dark energy in presence of dark matter in non-interacting situation. Subsequently, we have derived the pressure and energy density for Ricci dark energy. The equation of state parameter has bee... |
2310.15675 | Saeed Haddadi | S. Haddadi, M. A. Yurischev, M. Y. Abd-Rabbou, M. Azizi, M. R.
Pourkarimi, M. Ghominejad | Quantumness near a Schwarzschild black hole | 13 pages, 9 figures. All comments are welcome | Eur. Phys. J. C 84, 42 (2024) | 10.1140/epjc/s10052-024-12393-6 | null | gr-qc physics.space-ph quant-ph | http://creativecommons.org/licenses/by/4.0/ | The merging of quantum information science with the relativity theory
presents novel opportunities for understanding the enigmas surrounding the
transmission of information in relation to black holes. For this purpose, we
study the quantumness near a Schwarzschild black hole in a practical model
under decoherence. Th... | [
{
"created": "Tue, 24 Oct 2023 09:38:41 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jan 2024 15:33:25 GMT",
"version": "v2"
}
] | 2024-01-23 | [
[
"Haddadi",
"S.",
""
],
[
"Yurischev",
"M. A.",
""
],
[
"Abd-Rabbou",
"M. Y.",
""
],
[
"Azizi",
"M.",
""
],
[
"Pourkarimi",
"M. R.",
""
],
[
"Ghominejad",
"M.",
""
]
] | The merging of quantum information science with the relativity theory presents novel opportunities for understanding the enigmas surrounding the transmission of information in relation to black holes. For this purpose, we study the quantumness near a Schwarzschild black hole in a practical model under decoherence. The ... |
gr-qc/9906066 | Robert Mann | R.B. Mann, D. Robbins and T. Ohta | Exact Solutions of Relativistic Two-Body Motion in Lineal Gravity | 37 pages, Latex, 24 figures | Phys.Rev.D60:104048,1999 | 10.1103/PhysRevD.60.104048 | WATPHYS-TH99/03 | gr-qc | null | We develop the canonical formalism for a system of $N$ bodies in lineal
gravity and obtain exact solutions to the equations of motion for N=2. The
determining equation of the Hamiltonian is derived in the form of a
transcendental equation, which leads to the exact Hamiltonian to infinite order
of the gravitational co... | [
{
"created": "Wed, 16 Jun 1999 20:21:24 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mann",
"R. B.",
""
],
[
"Robbins",
"D.",
""
],
[
"Ohta",
"T.",
""
]
] | We develop the canonical formalism for a system of $N$ bodies in lineal gravity and obtain exact solutions to the equations of motion for N=2. The determining equation of the Hamiltonian is derived in the form of a transcendental equation, which leads to the exact Hamiltonian to infinite order of the gravitational coup... |
1910.11565 | Bobir Toshmatov | Bobir Toshmatov, Daniele Malafarina | Spinning test particles in the $\gamma$ spacetime | 11 pages, 4 figures, 2 tables | Phys. Rev. D 100, 104052 (2019) | 10.1103/PhysRevD.100.104052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the motion of spinning particles in the field of a well known
vacuum static axially-symmetric spacetime, known as $\gamma$ metric, that can
be interpreted as a generalization of the Schwarzschild manifold to include
prolate or oblate deformations. We derive the equations of motion for spinning
test partic... | [
{
"created": "Fri, 25 Oct 2019 08:24:41 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Nov 2019 05:17:00 GMT",
"version": "v2"
}
] | 2019-11-28 | [
[
"Toshmatov",
"Bobir",
""
],
[
"Malafarina",
"Daniele",
""
]
] | We consider the motion of spinning particles in the field of a well known vacuum static axially-symmetric spacetime, known as $\gamma$ metric, that can be interpreted as a generalization of the Schwarzschild manifold to include prolate or oblate deformations. We derive the equations of motion for spinning test particle... |
gr-qc/9505015 | Filipe de Moraes Paiva | F. M. Paiva and Anzhong Wang (DAF - ON/CNPq) | On the Geometry of Planar Domain Walls | 11 paghoj, Latex | Phys.Rev.D52:1281-1283,1995 | 10.1103/PhysRevD.52.1281 | null | gr-qc | null | The Geometry of planar domain walls is studied. It is argued that the planar
walls indeed have plane symmetry. In the Minkowski coordinates the walls are
mapped into revolution paraboloids.
| [
{
"created": "Thu, 11 May 1995 14:42:08 GMT",
"version": "v1"
}
] | 2009-07-07 | [
[
"Paiva",
"F. M.",
"",
"DAF - ON/CNPq"
],
[
"Wang",
"Anzhong",
"",
"DAF - ON/CNPq"
]
] | The Geometry of planar domain walls is studied. It is argued that the planar walls indeed have plane symmetry. In the Minkowski coordinates the walls are mapped into revolution paraboloids. |
2404.10302 | Shuichiro Yokoyama | Qi Peng, Shuichiro Yokoyama, Kiyotomo Ichiki | General Relativistic Approach to the Vis-viva Equation on Schwarzschild
Metric | 8 pages, 1 figure, Accepted for publication in General Relativity and
Gravitation | null | 10.1007/s10714-024-03235-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modification to the vis-viva equation that accounts for general
relativistic effects is introduced to enhance the accuracy of predictions of
orbital motion and precession. The updated equation reduces to the traditional
vis-viva equation under Newtonian conditions and is a more accurate tool for
astrodynamics than ... | [
{
"created": "Tue, 16 Apr 2024 06:10:38 GMT",
"version": "v1"
}
] | 2024-04-17 | [
[
"Peng",
"Qi",
""
],
[
"Yokoyama",
"Shuichiro",
""
],
[
"Ichiki",
"Kiyotomo",
""
]
] | A modification to the vis-viva equation that accounts for general relativistic effects is introduced to enhance the accuracy of predictions of orbital motion and precession. The updated equation reduces to the traditional vis-viva equation under Newtonian conditions and is a more accurate tool for astrodynamics than th... |
2304.05903 | Jaume Haro | Jaume de Haro | Reheating constraints in Instant Preheating | 15 pages. Version accepted for publication in PRD | null | 10.1103/PhysRevD.107.123511 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We use Instant Preheating as a mechanism to reheat the universe when its
evolution is modeled by a non-oscillating background. Once we obtain the
reheating temperature, we calculate the number of e-folds using two different
methods, which allows us to establish a relationship between the reheating
temperature and the... | [
{
"created": "Wed, 12 Apr 2023 15:18:57 GMT",
"version": "v1"
},
{
"created": "Tue, 9 May 2023 15:33:09 GMT",
"version": "v2"
}
] | 2023-06-21 | [
[
"de Haro",
"Jaume",
""
]
] | We use Instant Preheating as a mechanism to reheat the universe when its evolution is modeled by a non-oscillating background. Once we obtain the reheating temperature, we calculate the number of e-folds using two different methods, which allows us to establish a relationship between the reheating temperature and the s... |
1610.00736 | Bernardo Araneda | Bernardo Araneda | Symmetry operators and decoupled equations for linear fields on black
hole spacetimes | 57 pages, no figures; v3: minor changes, matches published version | Class. Quantum Grav. 34 (2017) 035002 | 10.1088/1361-6382/aa51ff | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the class of vacuum Petrov type D spacetimes with cosmological constant,
which includes the Kerr-(A)dS black hole as a particular case, we find a set of
four-dimensional operators that, when composed {\em off shell} with the Dirac,
Maxwell and linearized gravity equations, give a system of equations for spin
weigh... | [
{
"created": "Mon, 3 Oct 2016 20:38:43 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Oct 2016 19:38:24 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Mar 2017 15:14:47 GMT",
"version": "v3"
}
] | 2017-03-28 | [
[
"Araneda",
"Bernardo",
""
]
] | In the class of vacuum Petrov type D spacetimes with cosmological constant, which includes the Kerr-(A)dS black hole as a particular case, we find a set of four-dimensional operators that, when composed {\em off shell} with the Dirac, Maxwell and linearized gravity equations, give a system of equations for spin weighte... |
gr-qc/0612126 | Farook Rahaman | F.Rahaman, N.Begum, S.Das, M.Hossain and M.Kalam | Bianchi -I Cosmology with Magnetic Field in Lyra Geometry | 7 pages. Accepted in Theor.Math.Comp.Phys | null | null | null | gr-qc | null | A new class of Bianchi - I cosmological model with magnetic field within the
frame work of Lyra geometry has been presented . Exact solutions to the field
equations for the model are obtained . The physical and kinematical behaviors
of the model have been discussed.
| [
{
"created": "Wed, 20 Dec 2006 10:16:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rahaman",
"F.",
""
],
[
"Begum",
"N.",
""
],
[
"Das",
"S.",
""
],
[
"Hossain",
"M.",
""
],
[
"Kalam",
"M.",
""
]
] | A new class of Bianchi - I cosmological model with magnetic field within the frame work of Lyra geometry has been presented . Exact solutions to the field equations for the model are obtained . The physical and kinematical behaviors of the model have been discussed. |
2408.05481 | Koichiro Yasuda | Daiju Nakayama, Kin-ya Oda, and Koichiro Yasuda | Exploring Relativistic World of Electromagnetism on Computer | 34 pages, 5 figures | null | null | null | gr-qc hep-ph physics.class-ph physics.comp-ph physics.ed-ph | http://creativecommons.org/licenses/by/4.0/ | It is the theoretical structure of electromagnetism that led Einstein to
special relativity. To foster an intuitive understanding of relativity's core
idea, it is valuable to create a fully special relativistic computer simulation
incorporating electromagnetic dynamics. In this paper, we provide a basic
formulation f... | [
{
"created": "Sat, 10 Aug 2024 08:18:12 GMT",
"version": "v1"
}
] | 2024-08-13 | [
[
"Nakayama",
"Daiju",
""
],
[
"Oda",
"Kin-ya",
""
],
[
"Yasuda",
"Koichiro",
""
]
] | It is the theoretical structure of electromagnetism that led Einstein to special relativity. To foster an intuitive understanding of relativity's core idea, it is valuable to create a fully special relativistic computer simulation incorporating electromagnetic dynamics. In this paper, we provide a basic formulation for... |
gr-qc/0010084 | Jiri Podolsky | J. Podolsky | Exact non-singular waves in the anti-de Sitter universe | 15 pages, 3 figures, To appear in Gen. Rel. Grav | Gen.Rel.Grav. 33 (2001) 1093-1113 | 10.1023/A:1010284400184 | null | gr-qc | null | A class of radiative solutions of Einstein's field equations with a negative
cosmological constant and a pure radiation is investigated. The space-times,
which generalize the Defrise solution, represent exact gravitational waves
which interact with null matter and propagate in the anti-de Sitter universe.
Interesting... | [
{
"created": "Mon, 23 Oct 2000 15:31:36 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Podolsky",
"J.",
""
]
] | A class of radiative solutions of Einstein's field equations with a negative cosmological constant and a pure radiation is investigated. The space-times, which generalize the Defrise solution, represent exact gravitational waves which interact with null matter and propagate in the anti-de Sitter universe. Interestingly... |
1012.5202 | Ahmed Youssef | Nathalie Deruelle, Misao Sasaki, Yuuiti Sendouda, Ahmed Youssef | Inflation with a Weyl term, or ghosts at work | 14 pages, 4 figures | JCAP 1103:040,2011 | 10.1088/1475-7516/2011/03/040 | YITP-10-105 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to assess the role of ghosts in cosmology, we study the evolution of
linear cosmological perturbations during inflation when a Weyl term is added to
the action. Our main result is that vector perturbations can no longer be
ignored and that scalar modes diverge in the newtonian gauge but remain bounded
in the... | [
{
"created": "Thu, 23 Dec 2010 13:49:13 GMT",
"version": "v1"
}
] | 2011-03-31 | [
[
"Deruelle",
"Nathalie",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Sendouda",
"Yuuiti",
""
],
[
"Youssef",
"Ahmed",
""
]
] | In order to assess the role of ghosts in cosmology, we study the evolution of linear cosmological perturbations during inflation when a Weyl term is added to the action. Our main result is that vector perturbations can no longer be ignored and that scalar modes diverge in the newtonian gauge but remain bounded in the c... |
2301.13678 | Aniello Quaranta | Antonio Capolupo and Aniello Quaranta | Boson mixing and flavor vacuum in the expanding Universe: a possible
candidate for the dark energy | 19 pages, 2 figures | null | 10.1016/j.physletb.2023.137889 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We analyze the boson mixing in curved spacetime and compute the expectation
value of the energy-momentum tensor of bosons on the flavor vacuum in spatially
flat Friedmann-Lemaitre-Robertson-Walker metrics. We show that the
energy-momentum tensor of the flavor vacuum behaves as the effective
energy-momentum tensor of ... | [
{
"created": "Tue, 31 Jan 2023 14:52:13 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Capolupo",
"Antonio",
""
],
[
"Quaranta",
"Aniello",
""
]
] | We analyze the boson mixing in curved spacetime and compute the expectation value of the energy-momentum tensor of bosons on the flavor vacuum in spatially flat Friedmann-Lemaitre-Robertson-Walker metrics. We show that the energy-momentum tensor of the flavor vacuum behaves as the effective energy-momentum tensor of a ... |
1410.5588 | Pankaj Sheoran | Sushant G. Ghosh, Pankaj Sheoran and Muhammed Amir | Rotating Ay\'on-Beato-Garc\'ia black hole as a particle accelerator | 11 pages, 13 figures, 2 tables, accepted for publication in Physical
Review D | null | 10.1103/PhysRevD.90.103006 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the collision of two particles with equal masses moving in the
equatorial plane near horizon of the rotating regular Ay\'on-Beato-Garc\'ia
(ABG) black hole (BH) and calculate the center-of-mass (CM) energy for the
colliding particles for both extremal and non-extremal cases. It turns out that
CM energy depen... | [
{
"created": "Tue, 21 Oct 2014 09:34:36 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Sheoran",
"Pankaj",
""
],
[
"Amir",
"Muhammed",
""
]
] | We study the collision of two particles with equal masses moving in the equatorial plane near horizon of the rotating regular Ay\'on-Beato-Garc\'ia (ABG) black hole (BH) and calculate the center-of-mass (CM) energy for the colliding particles for both extremal and non-extremal cases. It turns out that CM energy depends... |
1604.08514 | Aur\'elien Hees | A. Hees, J. Gu\'ena, M. Abgrall, S. Bize, P.Wolf | Searching for an oscillating massive scalar field as a dark matter
candidate using atomic hyperfine frequency comparisons | 5 pages (+2 pages of supplemental material), 4 figures, version
accepted for publication in Phys. Rev. Letters | Phys. Rev. Lett. 117, 061301 (2016) | 10.1103/PhysRevLett.117.061301 | null | gr-qc hep-ph physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use six years of accurate hyperfine frequency comparison data of the dual
rubidium and caesium cold atom fountain FO2 at LNE-SYRTE to search for a
massive scalar dark matter candidate. Such a scalar field can induce harmonic
variations of the fine structure constant, of the mass of fermions and of the
quantum chro... | [
{
"created": "Thu, 28 Apr 2016 16:55:14 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Apr 2016 06:49:43 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Jul 2016 17:30:42 GMT",
"version": "v3"
}
] | 2016-08-08 | [
[
"Hees",
"A.",
""
],
[
"Guéna",
"J.",
""
],
[
"Abgrall",
"M.",
""
],
[
"Bize",
"S.",
""
],
[
"Wolf",
"P.",
""
]
] | We use six years of accurate hyperfine frequency comparison data of the dual rubidium and caesium cold atom fountain FO2 at LNE-SYRTE to search for a massive scalar dark matter candidate. Such a scalar field can induce harmonic variations of the fine structure constant, of the mass of fermions and of the quantum chromo... |
0812.3345 | Otakar Svitek | Otakar Svitek | Apparent horizons in D-dimensional Robinson-Trautman spacetime | 4 pages, 1 figure, to appear in ERE 2008 conference proceedings, to
be published by AIP | AIP Conf.Proc.1122:404-407,2009 | 10.1063/1.3141339 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the higher dimensional generalization of Penrose-Tod equation
describing apparent horizons in Robinson-Trautman spacetimes. New results
concerning the existence and uniqueness of its solutions in four dimensions are
proven. Namely, previous results of Tod are generalized to nonvanishing
cosmological constan... | [
{
"created": "Wed, 17 Dec 2008 17:18:38 GMT",
"version": "v1"
}
] | 2010-04-14 | [
[
"Svitek",
"Otakar",
""
]
] | We derive the higher dimensional generalization of Penrose-Tod equation describing apparent horizons in Robinson-Trautman spacetimes. New results concerning the existence and uniqueness of its solutions in four dimensions are proven. Namely, previous results of Tod are generalized to nonvanishing cosmological constant. |
1505.03310 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi | Near horizon hidden symmetry and entropy of Sultana-Dyer black hole: A
time dependent case | Comments added, to appear in Phys. Rev. D | Phys. Rev. D 92, 064026 (2015) | 10.1103/PhysRevD.92.064026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The non-extremal stationary black holes do have "{\it hidden}" conformal
symmetry in which case the generators form $SL(2,\mathbb{R})$ group. Here, I
explicitly show that the Sultana-Dyer black hole solution also possesses the
similar near horizon conformal symmetry. This is the first example of time
dependent case w... | [
{
"created": "Wed, 13 May 2015 10:20:21 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Aug 2015 12:18:35 GMT",
"version": "v2"
}
] | 2015-09-21 | [
[
"Majhi",
"Bibhas Ranjan",
""
]
] | The non-extremal stationary black holes do have "{\it hidden}" conformal symmetry in which case the generators form $SL(2,\mathbb{R})$ group. Here, I explicitly show that the Sultana-Dyer black hole solution also possesses the similar near horizon conformal symmetry. This is the first example of time dependent case whi... |
0807.3778 | Tomi Koivisto | Tomi S. Koivisto | Newtonian limit of nonlocal cosmology | 12 pages, refs added | Phys.Rev.D78:123505,2008 | 10.1103/PhysRevD.78.123505 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the consequences of the $f(R/\Box)$ gravity models for the Solar
system and the large scale structure of the universe. The spherically symmetric
solutions can be used to obtain bounds on the constant and the linear parts of
the correction terms. The evolution of cosmological matter structures is shown
to be ... | [
{
"created": "Thu, 24 Jul 2008 16:23:41 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jul 2008 15:15:01 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Koivisto",
"Tomi S.",
""
]
] | We study the consequences of the $f(R/\Box)$ gravity models for the Solar system and the large scale structure of the universe. The spherically symmetric solutions can be used to obtain bounds on the constant and the linear parts of the correction terms. The evolution of cosmological matter structures is shown to be go... |
2204.13200 | Vyacheslav Vandeev | V.P. Vandeev, A.N. Semenova | Deviation of nonradial geodesics in a static spherically symmetric
space-time | 15 pages, 5 figures | Eur. Phys. J. Plus 137, 185 (2022) | 10.1140/epjp/s13360-022-02408-0 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The article generalizes the description of tidal forces to the case of
geodesics with non-zero angular momentum in the metric of static spherically
symmetric black holes. We show that the geodesic deviation equation can be
diagonalized even with non-radial free motion of a test body in the
gravitational field. We pre... | [
{
"created": "Wed, 27 Apr 2022 21:18:22 GMT",
"version": "v1"
}
] | 2022-04-29 | [
[
"Vandeev",
"V. P.",
""
],
[
"Semenova",
"A. N.",
""
]
] | The article generalizes the description of tidal forces to the case of geodesics with non-zero angular momentum in the metric of static spherically symmetric black holes. We show that the geodesic deviation equation can be diagonalized even with non-radial free motion of a test body in the gravitational field. We prese... |
2308.13243 | Clifford M. Will | Fatemeh Taherasghari and Clifford M. Will | Compact binary systems in Einstein-Aether gravity: Direct integration of
the relaxed field equations to 2.5 post-Newtonian order | 17 pages; minor corrections and changes to agree with published
version | Phys. Rev. D. 108, 124026 (2023) | 10.1103/PhysRevD.108.124026 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Einstein-Aether theory is an alternative theory of gravity in which the
spacetime metric is supplemented by a long-range timelike vector field (the
"aether" field). Here, for the first time, we apply the full formalism of
post-Minkowskian theory and of the Direct Integration of the Relaxed Einstein
Equations (DIR... | [
{
"created": "Fri, 25 Aug 2023 08:32:43 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Dec 2023 21:24:49 GMT",
"version": "v2"
}
] | 2023-12-13 | [
[
"Taherasghari",
"Fatemeh",
""
],
[
"Will",
"Clifford M.",
""
]
] | The Einstein-Aether theory is an alternative theory of gravity in which the spacetime metric is supplemented by a long-range timelike vector field (the "aether" field). Here, for the first time, we apply the full formalism of post-Minkowskian theory and of the Direct Integration of the Relaxed Einstein Equations (DIRE)... |
gr-qc/9712056 | Takahiro Tanaka | Yasushi Mino, Misao Sasaki and Takahiro Tanaka | Gravitational Radiation Reaction | 34 pages ptptex file. To appear in Progress of Theoretical Physics
Supplement No.128 (1997) `Perturbative and Numerical Approaches to
Gravitational Radiation' | Prog.Theor.Phys.Suppl.128:373-406,1997 | 10.1143/PTPS.128.373 | null | gr-qc | null | We consider the radiation reaction to the motion of a point-like particle of
mass $m$ and specific spin $S$ traveling on a curved background. Assuming
$S=O(Gm)$ and $Gm\ll L$ where $L$ is the length scale of the background
curvature, we divide the spacetime into two regions; the external region where
the metric is ap... | [
{
"created": "Fri, 12 Dec 1997 08:59:09 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mino",
"Yasushi",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We consider the radiation reaction to the motion of a point-like particle of mass $m$ and specific spin $S$ traveling on a curved background. Assuming $S=O(Gm)$ and $Gm\ll L$ where $L$ is the length scale of the background curvature, we divide the spacetime into two regions; the external region where the metric is appr... |
1403.5505 | Bob Osano | Bob Osano | Magnetic fields from second-order interactions | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that when two types of perturbations interact in
cosmological perturbation theory, the interaction may lead to the generation of
a third type. In this article we discuss the generation of magnetic fields from
such interactions. We determine conditions under which the interaction of a
first-order magn... | [
{
"created": "Fri, 21 Mar 2014 16:15:17 GMT",
"version": "v1"
}
] | 2014-03-24 | [
[
"Osano",
"Bob",
""
]
] | It is well known that when two types of perturbations interact in cosmological perturbation theory, the interaction may lead to the generation of a third type. In this article we discuss the generation of magnetic fields from such interactions. We determine conditions under which the interaction of a first-order magnet... |
1612.00324 | Jakub Bilski | Jakub Bilski, Emanuele Alesci, Francesco Cianfrani, Pietro Don\`a,
Antonino Marciano | Quantum reduced loop gravity: extension to gauge vector field | 14 pages, typos corrected, improved notation to describe the
kinematical states. arXiv admin note: text overlap with arXiv:1506.08579 | Phys. Rev. D 95, 104048 (2017) | 10.1103/PhysRevD.95.104048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of Quantum Reduced Loop Gravity we quantize the
Hamiltonian for a gauge vector field. The regularization can be performed using
tools analogous to the ones adopted in full Loop Quantum Gravity, while the
matrix elements of the resulting operator between basis states are analytic
coefficients. Thi... | [
{
"created": "Thu, 1 Dec 2016 15:55:03 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Dec 2016 08:55:23 GMT",
"version": "v2"
}
] | 2017-06-07 | [
[
"Bilski",
"Jakub",
""
],
[
"Alesci",
"Emanuele",
""
],
[
"Cianfrani",
"Francesco",
""
],
[
"Donà",
"Pietro",
""
],
[
"Marciano",
"Antonino",
""
]
] | Within the framework of Quantum Reduced Loop Gravity we quantize the Hamiltonian for a gauge vector field. The regularization can be performed using tools analogous to the ones adopted in full Loop Quantum Gravity, while the matrix elements of the resulting operator between basis states are analytic coefficients. This ... |
1704.05615 | Toshiaki Ono | Toshiaki Ono, Asahi Ishihara and Hideki Asada | Gravitomagnetic bending angle of light with finite-distance corrections
in stationary axisymmetric spacetimes | 23 pages, 4 figures; appendix added, accepted by PRD | Phys. Rev. D 96, 104037 (2017) | 10.1103/PhysRevD.96.104037 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using the Gauss-Bonnet theorem, the bending angle of light in a static,
spherically symmetric and asymptotically flat spacetime has been recently
discussed, especially by taking account of the finite distance from a lens
object to a light source and a receiver [Ishihara, Suzuki, Ono, Asada, Phys.
Rev. D 95, 044017... | [
{
"created": "Wed, 19 Apr 2017 05:23:17 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Nov 2017 04:24:21 GMT",
"version": "v2"
}
] | 2017-11-29 | [
[
"Ono",
"Toshiaki",
""
],
[
"Ishihara",
"Asahi",
""
],
[
"Asada",
"Hideki",
""
]
] | By using the Gauss-Bonnet theorem, the bending angle of light in a static, spherically symmetric and asymptotically flat spacetime has been recently discussed, especially by taking account of the finite distance from a lens object to a light source and a receiver [Ishihara, Suzuki, Ono, Asada, Phys. Rev. D 95, 044017 (... |
2306.11790 | Esha Bhatia | Esha Bhatia, Sayan Chakrabarti and Sovan Chakraborty | Velocity dispersion of dark matter deficient ultra-diffuse galaxies: A
case for modified gravity | 10 pages, 8 figures | Phys. Rev. D108, 064021 (2023) | 10.1103/PhysRevD.108.064021 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The line of sight velocity dispersion of the ultra-diffuse galaxies (UDGs)
NGC1052-DF2 and NGC1052-DF4 have been reasonably explained only with the
baryonic matter, without requiring any dark matter contribution. The comparable
ratio between the baryonic and halo mass also ascertain the above claim for the
two dark m... | [
{
"created": "Tue, 20 Jun 2023 18:00:01 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2023 10:00:23 GMT",
"version": "v2"
}
] | 2023-09-19 | [
[
"Bhatia",
"Esha",
""
],
[
"Chakrabarti",
"Sayan",
""
],
[
"Chakraborty",
"Sovan",
""
]
] | The line of sight velocity dispersion of the ultra-diffuse galaxies (UDGs) NGC1052-DF2 and NGC1052-DF4 have been reasonably explained only with the baryonic matter, without requiring any dark matter contribution. The comparable ratio between the baryonic and halo mass also ascertain the above claim for the two dark mat... |
1003.3306 | Piotr Bizon | Piotr Bizo\'n and Arthur Wasserman | Remark on non-existence of self-similar solutions in 4+1 vacuum
gravitational collapse | 2 pages | Class.Quant.Grav.27:122001,2010 | 10.1088/0264-9381/27/12/122001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a very short proof that the vacuum Einstein equations in 4+1
dimensions have no cohomogeneity-two Bianchi IX continuously self-similar
solutions.
| [
{
"created": "Wed, 17 Mar 2010 06:36:00 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Bizoń",
"Piotr",
""
],
[
"Wasserman",
"Arthur",
""
]
] | We give a very short proof that the vacuum Einstein equations in 4+1 dimensions have no cohomogeneity-two Bianchi IX continuously self-similar solutions. |
1903.03043 | Timothy Clifton | Jessie Durk, Timothy Clifton | Discrete Cosmological Models in the Brans-Dicke Theory of Gravity | 18 pages, 8 figures | Class. Quantum Grav. 36 (2019) 185011 | 10.1088/1361-6382/ab329e | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of building inhomogeneous cosmological models in
scalar-tensor theories of gravity. This starts by splitting the field equations
of these theories into constraint and evolution equations, and then proceeds by
identifying exact solutions to the constraints. We find exact, closed form
expression... | [
{
"created": "Thu, 7 Mar 2019 17:00:34 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Aug 2019 09:07:32 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Durk",
"Jessie",
""
],
[
"Clifton",
"Timothy",
""
]
] | We consider the problem of building inhomogeneous cosmological models in scalar-tensor theories of gravity. This starts by splitting the field equations of these theories into constraint and evolution equations, and then proceeds by identifying exact solutions to the constraints. We find exact, closed form expressions ... |
2404.01764 | Kiwamu Izumi | Ryosuke Sugimoto, Yusuke Okuma, Koji Nagano, Kentaro Komori and Kiwamu
Izumi | Experimental Demonstration of Back-Linked Fabry-Perot Interferometer for
the Space Gravitational Wave Antenna | 13 pages, 8 figures | Phys. Rev. D 109, 022003 (2024) | 10.1103/PhysRevD.109.022003 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The back-linked Fabry-Perot interferometer (BLFPI) is an interferometer
topology proposed for space gravitational wave antennas with the use of
inter-satellite Fabry-Perot interferometers. The BLFPI offers simultaneous and
independent control over all interferometer length degrees of freedom by
controlling the laser ... | [
{
"created": "Tue, 2 Apr 2024 09:29:44 GMT",
"version": "v1"
}
] | 2024-04-03 | [
[
"Sugimoto",
"Ryosuke",
""
],
[
"Okuma",
"Yusuke",
""
],
[
"Nagano",
"Koji",
""
],
[
"Komori",
"Kentaro",
""
],
[
"Izumi",
"Kiwamu",
""
]
] | The back-linked Fabry-Perot interferometer (BLFPI) is an interferometer topology proposed for space gravitational wave antennas with the use of inter-satellite Fabry-Perot interferometers. The BLFPI offers simultaneous and independent control over all interferometer length degrees of freedom by controlling the laser fr... |
2402.03984 | Jing-Rui Zhang | Rong-Gen Cai, Jing-Rui Zhang, Yun-Long Zhang | Angular correlation and deformed Hellings-Downs curve by spin-2
ultralight dark matter | 7 pages, 4 figures | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The pulsar timings are sensitive to both the nanohertz gravitational-wave
background and the oscillation of ultralight dark matter. The Hellings-Downs
angular correlation curve provides a criterion to search for stochastic
gravitational-wave backgrounds at nanohertz via pulsar timing arrays. We study
the angular corr... | [
{
"created": "Tue, 6 Feb 2024 13:20:05 GMT",
"version": "v1"
}
] | 2024-02-07 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Zhang",
"Jing-Rui",
""
],
[
"Zhang",
"Yun-Long",
""
]
] | The pulsar timings are sensitive to both the nanohertz gravitational-wave background and the oscillation of ultralight dark matter. The Hellings-Downs angular correlation curve provides a criterion to search for stochastic gravitational-wave backgrounds at nanohertz via pulsar timing arrays. We study the angular correl... |
gr-qc/0202010 | Sanjeev S. Seahra | Sanjeev S. Seahra and Paul S. Wesson | The Structure of the Big Bang from Higher-Dimensional Embeddings | 11 pages, 5 figures, revtex4, accepted in Class. Quant. Grav | Class.Quant.Grav. 19 (2002) 1139-1155 | 10.1088/0264-9381/19/6/307 | null | gr-qc | null | We give relations for the embedding of spatially-flat
Friedmann-Robertson-Walker cosmological models of Einstein's theory in flat
manifolds of the type used in Kaluza-Klein theory. We present embedding
diagrams that depict different 4D universes as hypersurfaces in a higher
dimensional flat manifold. The morphology o... | [
{
"created": "Mon, 4 Feb 2002 18:39:25 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Seahra",
"Sanjeev S.",
""
],
[
"Wesson",
"Paul S.",
""
]
] | We give relations for the embedding of spatially-flat Friedmann-Robertson-Walker cosmological models of Einstein's theory in flat manifolds of the type used in Kaluza-Klein theory. We present embedding diagrams that depict different 4D universes as hypersurfaces in a higher dimensional flat manifold. The morphology of ... |
2304.07890 | Miguel Socolovsky | Miguel Socolovsky | Black Holes and the Third Law of Thermodynamics Revisited | 5 pages, 4 figures | Journal of High Energy Physics, Gravitation and Cosmology, 2023,
9, 499-505 | 10.4236/jhepgc.2023.92039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes contradict the Nernst-Planck (N/P) version of the 3rd. law of
thermodynamics, but agree with its unattainability (U) version. This happens
without contradiction, because the N/P and U versions are not equivalent,
namely, N/P implies U but U does not imply N/P. So, black holes obey the weaker
version of th... | [
{
"created": "Sun, 16 Apr 2023 21:06:21 GMT",
"version": "v1"
}
] | 2023-04-18 | [
[
"Socolovsky",
"Miguel",
""
]
] | Black holes contradict the Nernst-Planck (N/P) version of the 3rd. law of thermodynamics, but agree with its unattainability (U) version. This happens without contradiction, because the N/P and U versions are not equivalent, namely, N/P implies U but U does not imply N/P. So, black holes obey the weaker version of the ... |
2312.15811 | Esraa Elkhateeb | Mohamed Tharwat, Amr AlBarqawy, Adel Awad, and Esraa Elkhateeb | Dyonic Taub-NUT-AdS Spaces: Phase Structures of all Horizon Geometries | 31 pages, 14 figures, 44 References | Phys. Rev. D 109, 084026 (2024) | 10.1103/PhysRevD.109.084026 | 2312.15811 [gr-qc] | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study phase structures of Lorentzian Dyonic Taub-NUT-AdS spacetimes for
different horizon geometries, which are spherical, flat, and hyperbolic. We
check the consistency of our extended thermodynamics approach through
satisfying the first law, the Gibbs-Duhem relation, and the generalized Smarr's
relation. Althoug... | [
{
"created": "Mon, 25 Dec 2023 21:07:58 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Mar 2024 01:31:48 GMT",
"version": "v2"
}
] | 2024-04-16 | [
[
"Tharwat",
"Mohamed",
""
],
[
"AlBarqawy",
"Amr",
""
],
[
"Awad",
"Adel",
""
],
[
"Elkhateeb",
"Esraa",
""
]
] | We study phase structures of Lorentzian Dyonic Taub-NUT-AdS spacetimes for different horizon geometries, which are spherical, flat, and hyperbolic. We check the consistency of our extended thermodynamics approach through satisfying the first law, the Gibbs-Duhem relation, and the generalized Smarr's relation. Although ... |
1609.02783 | Valerio Faraoni | V. Faraoni, F. Hammad, and S.D. Belknap-Keet | Revisiting the Brans solutions of scalar-tensor gravity | 14 pages, comments welcome | Phys. Rev. D 94, 104019 (2016) | 10.1103/PhysRevD.94.104019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by statements in the literature which contradict two general
theorems, the static and spherically symmetric Brans solutions of scalar-tensor
gravity are analyzed explicitly in both the Jordan and the Einstein conformal
frames. Depending on the parameter range, these solutions describe wormholes or
naked sin... | [
{
"created": "Fri, 9 Sep 2016 13:20:17 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Faraoni",
"V.",
""
],
[
"Hammad",
"F.",
""
],
[
"Belknap-Keet",
"S. D.",
""
]
] | Motivated by statements in the literature which contradict two general theorems, the static and spherically symmetric Brans solutions of scalar-tensor gravity are analyzed explicitly in both the Jordan and the Einstein conformal frames. Depending on the parameter range, these solutions describe wormholes or naked singu... |
gr-qc/9806122 | Charles Torre | C. G. Torre (Utah State University) | Midi-superspace Models of Canonical Quantum Gravity | 29 pages, RevTex, contribution to "Quantum Gravity in the Southern
Cone II", Bariloche, Argentina, January 6-10, 1998 | Int.J.Theor.Phys.38:1081-1102,1999 | 10.1023/A:1026650212053 | null | gr-qc hep-th | null | A midi-superspace model is a field theory obtained by symmetry reduction of a
parent gravitational theory. Such models have proven useful for exploring the
classical and quantum dynamics of the gravitational field. I present 3 recent
classes of results pertinent to canonical quantization of vacuum general
relativity ... | [
{
"created": "Tue, 30 Jun 1998 17:14:50 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Torre",
"C. G.",
"",
"Utah State University"
]
] | A midi-superspace model is a field theory obtained by symmetry reduction of a parent gravitational theory. Such models have proven useful for exploring the classical and quantum dynamics of the gravitational field. I present 3 recent classes of results pertinent to canonical quantization of vacuum general relativity in... |
1309.6750 | Mathieu Pellen | Mathieu Pellen | Conservation laws for colliding branes with induced gravity | 16 pages. 9 figures. Simplified version that matched the published
version. The final publication is available at
http://link.springer.com/article/10.1007%2Fs10509-015-2296-5 | Astrophys.Space Sci. 357 (2015) 1, 24 | 10.1007/s10509-015-2296-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive conservation laws for collisions of self-gravitating $n$-branes (or
$n$-dimensional shells) in an $(n+2)$ dimensional spacetime including induced
gravity on the brane. Previous work has shown how geometrical identities in
general relativity enforce conservation of energy-momentum at collisions. The
inclusio... | [
{
"created": "Thu, 26 Sep 2013 08:05:51 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Apr 2015 09:16:20 GMT",
"version": "v2"
}
] | 2015-04-30 | [
[
"Pellen",
"Mathieu",
""
]
] | We derive conservation laws for collisions of self-gravitating $n$-branes (or $n$-dimensional shells) in an $(n+2)$ dimensional spacetime including induced gravity on the brane. Previous work has shown how geometrical identities in general relativity enforce conservation of energy-momentum at collisions. The inclusion ... |
1405.5714 | Hassan Amirhashchi | Hassan Amirhashchi, S. N. A. Qazi and Hishamuddin Zainuddin | An Interacting Scenario for Dark Energy in Bianchi Type-I Universe | 12 pages, 6 figures, Research in Astronomy and Astrophysics, 2014 | null | 10.1088/1674-4527/14/11/002 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the interaction between dark energy (DE) and dark matter (DM) in the
scope of anisotropic bianchi type I space-time. First we derive the general
form of the dark energy equation of state parameter (EoS) in both
non-interacting and interacting cases and then we examine it's future by
applying a hyperbolic sca... | [
{
"created": "Thu, 22 May 2014 11:25:44 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Amirhashchi",
"Hassan",
""
],
[
"Qazi",
"S. N. A.",
""
],
[
"Zainuddin",
"Hishamuddin",
""
]
] | We study the interaction between dark energy (DE) and dark matter (DM) in the scope of anisotropic bianchi type I space-time. First we derive the general form of the dark energy equation of state parameter (EoS) in both non-interacting and interacting cases and then we examine it's future by applying a hyperbolic scale... |
gr-qc/0303109 | Matthew Anderson | Scott A. Caveny and Richard A. Matzner | Adaptive Event Horizon Tracking and Critical Phenomena in Binary Black
Hole Coalescence | 13 pages, 20 figures Corrected labels on figures 17 through 20.
Corrected typos in references. Added some comments | Phys.Rev. D68 (2003) 104003 | 10.1103/PhysRevD.68.104003 | null | gr-qc | null | This work establishes critical phenomena in the topological transition of
black hole coalescence. We describe and validate a computational front tracking
event horizon solver, developed for generic studies of the black hole
coalescence problem. We then apply this to the Kastor - Traschen axisymmetric
analytic solutio... | [
{
"created": "Thu, 27 Mar 2003 20:07:45 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Apr 2003 21:12:09 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Caveny",
"Scott A.",
""
],
[
"Matzner",
"Richard A.",
""
]
] | This work establishes critical phenomena in the topological transition of black hole coalescence. We describe and validate a computational front tracking event horizon solver, developed for generic studies of the black hole coalescence problem. We then apply this to the Kastor - Traschen axisymmetric analytic solution ... |
2206.00977 | Fabrizio Di Giovanni | Fabrizio Di Giovanni, Nicol\'as Sanchis-Gual, Davide Guerra, Miquel
Miravet-Ten\'es, Pablo Cerd\'a-Dur\'an, Jos\'e Antonio Font | Impact of ultralight bosonic dark matter on the dynamical bar-mode
instability of rotating neutron stars | 18 pages, 8 figures | null | 10.1103/PhysRevD.106.044008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effects ultralight bosonic field dark matter may have on
the dynamics of unstable differentially-rotating neutron stars prone to the
bar-mode instability. To this aim we perform numerical simulations in general
relativity of rotating neutron stars accreting an initial spherically symmetric
bosonic ... | [
{
"created": "Thu, 2 Jun 2022 10:43:27 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Jul 2022 06:37:32 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Di Giovanni",
"Fabrizio",
""
],
[
"Sanchis-Gual",
"Nicolás",
""
],
[
"Guerra",
"Davide",
""
],
[
"Miravet-Tenés",
"Miquel",
""
],
[
"Cerdá-Durán",
"Pablo",
""
],
[
"Font",
"José Antonio",
""
]
] | We investigate the effects ultralight bosonic field dark matter may have on the dynamics of unstable differentially-rotating neutron stars prone to the bar-mode instability. To this aim we perform numerical simulations in general relativity of rotating neutron stars accreting an initial spherically symmetric bosonic fi... |
2301.01662 | Pavel Jirou\v{s}ek | Pavel Jirou\v{s}ek | Unimodular approaches to the cosmological constant problem | Invited review for Universe, Special Issue 'Cosmological Constant'
(https://www.mdpi.com/journal/universe/special_issues/cosmological_constant_problem),
22 pages + references | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We review selected aspects of unimodular gravity and we discuss its viability
as a solution of the old cosmological constant problem. In unimodular gravity
the cosmological constant is promoted to a global degree of freedom. We
highlight the importance of correctly setting up its initial data in order to
achieve a re... | [
{
"created": "Wed, 4 Jan 2023 15:20:03 GMT",
"version": "v1"
}
] | 2023-01-05 | [
[
"Jiroušek",
"Pavel",
""
]
] | We review selected aspects of unimodular gravity and we discuss its viability as a solution of the old cosmological constant problem. In unimodular gravity the cosmological constant is promoted to a global degree of freedom. We highlight the importance of correctly setting up its initial data in order to achieve a reso... |
gr-qc/0606112 | C\'esar Augusto Costa | Cesar Augusto Costa and Odylio Denys de Aguiar | Spherical gravitational wave detectors: An approach for real time data
analysis | 8 pages, 10 figures, submitted to PRD | null | null | null | gr-qc | null | We have developed a full model to simulate spherical detectors where all main
sources of noise are considered. We have built a computer code for determining
the source direction and the wave polarization (solution of the inverse
problem) in real time acquisition. The digital filter used is a simple bandpass
filter. T... | [
{
"created": "Mon, 26 Jun 2006 13:17:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Costa",
"Cesar Augusto",
""
],
[
"de Aguiar",
"Odylio Denys",
""
]
] | We have developed a full model to simulate spherical detectors where all main sources of noise are considered. We have built a computer code for determining the source direction and the wave polarization (solution of the inverse problem) in real time acquisition. The digital filter used is a simple bandpass filter. The... |
2404.10149 | Rudnei Ramos | G. L. L. W. Levy and Rudnei O. Ramos | $\alpha$-attractor potentials in loop quantum cosmology | 11 pages, 6 figures. Replaced with the version matching the published
one in the Physical Review D | Phys. Rev. D 110, 043507 (2024) | 10.1103/PhysRevD.110.043507 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We perform in this work an analysis of the background dynamics for
$\alpha$-attractor models in the context of loop quantum cosmology. Particular
attention is given to the determination of the duration of the inflationary
phase that is preceded by the quantum bounce in these models. From an analysis
of the general pr... | [
{
"created": "Mon, 15 Apr 2024 21:38:26 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 2024 23:38:58 GMT",
"version": "v2"
}
] | 2024-08-07 | [
[
"Levy",
"G. L. L. W.",
""
],
[
"Ramos",
"Rudnei O.",
""
]
] | We perform in this work an analysis of the background dynamics for $\alpha$-attractor models in the context of loop quantum cosmology. Particular attention is given to the determination of the duration of the inflationary phase that is preceded by the quantum bounce in these models. From an analysis of the general pred... |
gr-qc/0201015 | Harold Blas | Antonio Accioly and Harold Blas | Exact Foldy-Wouthuysen transformation for spin 0 particle in curved
space | 10 pages, revtex, improved version to appear in Phys. Rev. D | Phys.Rev.D66:067501,2002 | 10.1103/PhysRevD.66.067501 | null | gr-qc hep-th | null | Up to now, the only known exact Foldy- Wouthuysen transformation (FWT) in
curved space is that concerning Dirac particles coupled to static spacetime
metrics. Here we construct the exact FWT related to a real spin-0 particle for
the aforementioned spacetimes. This exact transformation exists independently
of the valu... | [
{
"created": "Sat, 5 Jan 2002 16:07:37 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jan 2002 17:08:03 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Jul 2002 00:44:23 GMT",
"version": "v3"
}
] | 2011-08-17 | [
[
"Accioly",
"Antonio",
""
],
[
"Blas",
"Harold",
""
]
] | Up to now, the only known exact Foldy- Wouthuysen transformation (FWT) in curved space is that concerning Dirac particles coupled to static spacetime metrics. Here we construct the exact FWT related to a real spin-0 particle for the aforementioned spacetimes. This exact transformation exists independently of the value ... |
1408.5538 | Daniel Guariento | Niayesh Afshordi, Michele Fontanini, Daniel C. Guariento | Horndeski meets McVittie: A scalar field theory for accretion onto
cosmological black holes | 10 pages, 2 figures | Phys. Rev. D 90, 084012 (2014) | 10.1103/PhysRevD.90.084012 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the generalized McVittie spacetime, which represents a black
hole with time-dependent mass in an expanding universe, is an exact solution of
a subclass of the Horndeski family of actions. The heat-flow term responsible
for the energy transfer between the black hole and the cosmological background
is gene... | [
{
"created": "Sun, 24 Aug 2014 00:16:00 GMT",
"version": "v1"
}
] | 2014-10-22 | [
[
"Afshordi",
"Niayesh",
""
],
[
"Fontanini",
"Michele",
""
],
[
"Guariento",
"Daniel C.",
""
]
] | We show that the generalized McVittie spacetime, which represents a black hole with time-dependent mass in an expanding universe, is an exact solution of a subclass of the Horndeski family of actions. The heat-flow term responsible for the energy transfer between the black hole and the cosmological background is genera... |
1503.00974 | Josep M. Pons | Naresh Dadhich and Josep M. Pons | Static pure Lovelock black hole solutions with horizon topology ${\bf
S^{(n)} \times S^{(n)}}$ | 21 pages. Matches JHEP published version | null | 10.1007/JHEP05(2015)067 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that vacuum equation of arbitrary Lovelock order for static
spacetime ultimately reduces to a single algebraic equation, we show that the
same continues to hold true for pure Lovelock gravity of arbitrary order $N$
for topology ${\bf S^{(n)} \times S^{(n)}}$. We thus obtain pure Lovelock
static black... | [
{
"created": "Tue, 3 Mar 2015 15:28:31 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2015 09:52:37 GMT",
"version": "v2"
}
] | 2016-02-19 | [
[
"Dadhich",
"Naresh",
""
],
[
"Pons",
"Josep M.",
""
]
] | It is well known that vacuum equation of arbitrary Lovelock order for static spacetime ultimately reduces to a single algebraic equation, we show that the same continues to hold true for pure Lovelock gravity of arbitrary order $N$ for topology ${\bf S^{(n)} \times S^{(n)}}$. We thus obtain pure Lovelock static black h... |
2401.16071 | Xiao-Mei Kuang | Yong-Zhuang Li, Xiao-Mei Kuang | Precessing and periodic timelike orbits and their potential applications
in Einsteinian cubic gravity | 15 pages | Eur. Phys. J. C (2024) 84:529 | 10.1140/epjc/s10052-024-12895-3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Einsteinian cubic gravity (ECG) is the most general theory up to cubic order
in curvature, which have the same graviton spectrum as the Einstein theory. In
this paper, we investigate the geodesic motions of timelike particles around
the four dimensional asymptotically flat black holes in ECG, and discuss their
potent... | [
{
"created": "Mon, 29 Jan 2024 11:28:03 GMT",
"version": "v1"
}
] | 2024-07-03 | [
[
"Li",
"Yong-Zhuang",
""
],
[
"Kuang",
"Xiao-Mei",
""
]
] | Einsteinian cubic gravity (ECG) is the most general theory up to cubic order in curvature, which have the same graviton spectrum as the Einstein theory. In this paper, we investigate the geodesic motions of timelike particles around the four dimensional asymptotically flat black holes in ECG, and discuss their potentia... |
gr-qc/0002011 | Matt Visser | Matt Visser (Washington University in Saint Louis) | Comment on "Relativistic Effects of Light in Moving Media with Extremely
Low Group Velocity" | one page comment, uses ReV_TeX 3; discussion clarified; basic
physical results unaltered | Phys.Rev.Lett. 85 (2000) 5252 | 10.1103/PhysRevLett.85.5252 | null | gr-qc cond-mat.soft physics.optics | null | In [cond-mat/9906332; Phys. Rev. Lett. 84, 822 (2000)] and [physics/9906038;
Phys. Rev. A 60, 4301 (1999)] Leonhardt and Piwnicki have presented an
interesting analysis of how to use a flowing dielectric fluid to generate a
so-called "optical black hole". Qualitatively similar phenomena using
acoustical processes hav... | [
{
"created": "Wed, 2 Feb 2000 19:59:08 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2000 17:04:02 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Visser",
"Matt",
"",
"Washington University in Saint Louis"
]
] | In [cond-mat/9906332; Phys. Rev. Lett. 84, 822 (2000)] and [physics/9906038; Phys. Rev. A 60, 4301 (1999)] Leonhardt and Piwnicki have presented an interesting analysis of how to use a flowing dielectric fluid to generate a so-called "optical black hole". Qualitatively similar phenomena using acoustical processes have ... |
2002.08342 | Justin Feng | Justin C. Feng | Note on gravity at the boundary of an AdS vacuum | 3 pages. Added reference, changes to title and abstract. The author
was made aware of a result that changed the conclusions | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, I describe an attempt to construct a phenomenological
gravitational model at the boundary of the AdS manifold from the variation of
boundary terms in the gravitational action. I find that for an AdS vacuum in
the bulk, geometric constraints require that the energy-momentum tensor has
constant trace.
| [
{
"created": "Wed, 19 Feb 2020 18:43:58 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Apr 2020 08:26:14 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Aug 2020 10:08:17 GMT",
"version": "v3"
}
] | 2020-08-13 | [
[
"Feng",
"Justin C.",
""
]
] | In this note, I describe an attempt to construct a phenomenological gravitational model at the boundary of the AdS manifold from the variation of boundary terms in the gravitational action. I find that for an AdS vacuum in the bulk, geometric constraints require that the energy-momentum tensor has constant trace. |
0812.2576 | Metin Gurses | Metin Gurses | G\"odel Type Metrics in Three Dimensions | 17 pages | null | 10.1007/s10714-009-0914-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the G{\" o}del type Metrics in three dimensions with arbitrary
two dimensional background space satisfy the Einstein-perfect fluid field
equations. There exists only one first order partial differential equation
satisfied by the components of fluid's velocity vector field. We then show that
the same metr... | [
{
"created": "Sun, 14 Dec 2008 10:53:59 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Dec 2008 13:27:35 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Gurses",
"Metin",
""
]
] | We show that the G{\" o}del type Metrics in three dimensions with arbitrary two dimensional background space satisfy the Einstein-perfect fluid field equations. There exists only one first order partial differential equation satisfied by the components of fluid's velocity vector field. We then show that the same metric... |
gr-qc/0008054 | Martin Bojowald | Martin Bojowald | Angular Momentum in Loop Quantum Gravity | 9 pages | null | null | PITHA 00/19 | gr-qc hep-th | null | An angular momentum operator in loop quantum gravity is defined using
spherically symmetric states as a non-rotating reference system. It can be
diagonalized simultaneously with the area operator and has the familiar
spectrum. The operator indicates how the quantum geometry of non-rotating
isolated horizons can be ge... | [
{
"created": "Tue, 22 Aug 2000 11:30:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bojowald",
"Martin",
""
]
] | An angular momentum operator in loop quantum gravity is defined using spherically symmetric states as a non-rotating reference system. It can be diagonalized simultaneously with the area operator and has the familiar spectrum. The operator indicates how the quantum geometry of non-rotating isolated horizons can be gene... |
0707.0270 | Eric Varoquaux | E. Varoquaux and G. Varoquaux | The Sagnac effect in superfluids | Letter to the Editors of Uspheki Fisiki Nauk - 4 pages | null | null | null | gr-qc cond-mat.other | null | We comment on the interpretation of absolute rotation measurements with
superfluids, which involve the Sagnac effect. This effect, first observed in
rotating optical interferometers, has now been seen in a host of different
physical systems, ranging from atomic clocks to electrons, neutrons, atomic
beams, ... We show... | [
{
"created": "Mon, 2 Jul 2007 16:46:52 GMT",
"version": "v1"
}
] | 2007-07-04 | [
[
"Varoquaux",
"E.",
""
],
[
"Varoquaux",
"G.",
""
]
] | We comment on the interpretation of absolute rotation measurements with superfluids, which involve the Sagnac effect. This effect, first observed in rotating optical interferometers, has now been seen in a host of different physical systems, ranging from atomic clocks to electrons, neutrons, atomic beams, ... We show t... |
1305.2963 | Michalis Agathos | Michalis Agathos, Walter Del Pozzo, Tjonnie G. F. Li, Chris Van Den
Broeck, John Veitch, Salvatore Vitale | Testing general relativity using gravitational waves from binary neutron
stars: Effect of spins | 3 pages, 1 figure, submitted to Proceedings of the 13th Marcel
Grossmann Meeting (MG13), Stockholm, Sweden, 1-7 July 2012 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a Bayesian data analysis pipeline for testing GR using
gravitational wave signals from coalescing compact binaries, and in particular
binary neutron stars. In this study, we investigate its performance when
sources with spins are taken into account.
| [
{
"created": "Mon, 13 May 2013 21:45:13 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 2013 13:17:58 GMT",
"version": "v2"
}
] | 2013-08-06 | [
[
"Agathos",
"Michalis",
""
],
[
"Del Pozzo",
"Walter",
""
],
[
"Li",
"Tjonnie G. F.",
""
],
[
"Broeck",
"Chris Van Den",
""
],
[
"Veitch",
"John",
""
],
[
"Vitale",
"Salvatore",
""
]
] | We present a Bayesian data analysis pipeline for testing GR using gravitational wave signals from coalescing compact binaries, and in particular binary neutron stars. In this study, we investigate its performance when sources with spins are taken into account. |
gr-qc/0509012 | Christian Koenigsdoerffer | Christian Koenigsdoerffer, Achamveedu Gopakumar | Parametric derivation of the observable relativistic periastron advance
for binary pulsars | 12 pages including 1 figure; submitted to PRD | Phys.Rev. D73 (2006) 044011 | 10.1103/PhysRevD.73.044011 | null | gr-qc | null | We compute the dimensionless relativistic periastron advance parameter $k$,
which is measurable from the timing of relativistic binary pulsars. We employ
for the computation the recently derived Keplerian-type parametric solution to
the post-Newtonian (PN) accurate conservative dynamics of spinning compact
binaries m... | [
{
"created": "Fri, 2 Sep 2005 11:57:59 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Koenigsdoerffer",
"Christian",
""
],
[
"Gopakumar",
"Achamveedu",
""
]
] | We compute the dimensionless relativistic periastron advance parameter $k$, which is measurable from the timing of relativistic binary pulsars. We employ for the computation the recently derived Keplerian-type parametric solution to the post-Newtonian (PN) accurate conservative dynamics of spinning compact binaries mov... |
1803.10876 | Rampei Kimura | Ryotaro Kase, Rampei Kimura, Atsushi Naruko, Daisuke Yoshida | Stable cosmological solutions in degenerate theory of gravity | 9 pages, 1 table | Physics Letters B 783 (2018) 320-325 | 10.1016/j.physletb.2018.07.009 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmological applications of extended vector-tensor theories, whose
Lagrangians contain up to two derivatives with respect to metric and vector
field. We derive background equations under the assumption of homogeneous and
isotropic universe and study the nature of cosmological perturbations on top of
the bac... | [
{
"created": "Wed, 28 Mar 2018 23:22:25 GMT",
"version": "v1"
}
] | 2018-07-20 | [
[
"Kase",
"Ryotaro",
""
],
[
"Kimura",
"Rampei",
""
],
[
"Naruko",
"Atsushi",
""
],
[
"Yoshida",
"Daisuke",
""
]
] | We study cosmological applications of extended vector-tensor theories, whose Lagrangians contain up to two derivatives with respect to metric and vector field. We derive background equations under the assumption of homogeneous and isotropic universe and study the nature of cosmological perturbations on top of the backg... |
gr-qc/9908010 | Jose A. Font | Jose A. Font (AEI, Golm), Nikolaos Stergioulas (AEI, Golm) and Kostas
D. Kokkotas (Aristotle University of Thessaloniki) | Nonlinear hydrodynamical evolution of rotating relativistic stars:
Numerical methods and code tests | 13 pages, 10 figures, submitted to MNRAS | Mon.Not.Roy.Astron.Soc. 313 (2000) 678 | 10.1046/j.1365-8711.2000.03254.x | null | gr-qc astro-ph | null | We present numerical hydrodynamical evolutions of rapidly rotating
relativistic stars, using an axisymmetric, nonlinear relativistic hydrodynamics
code. We use four different high-resolution shock-capturing (HRSC)
finite-difference schemes (based on approximate Riemann solvers) and compare
their accuracy in preservin... | [
{
"created": "Tue, 3 Aug 1999 10:31:43 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Font",
"Jose A.",
"",
"AEI, Golm"
],
[
"Stergioulas",
"Nikolaos",
"",
"AEI, Golm"
],
[
"Kokkotas",
"Kostas D.",
"",
"Aristotle University of Thessaloniki"
]
] | We present numerical hydrodynamical evolutions of rapidly rotating relativistic stars, using an axisymmetric, nonlinear relativistic hydrodynamics code. We use four different high-resolution shock-capturing (HRSC) finite-difference schemes (based on approximate Riemann solvers) and compare their accuracy in preserving ... |
2006.01329 | Valery Nikulin V | V. V. Nikulin, S. G. Rubin, P. M. Petryakova | Formation of conserved charge at the de Sitter space | 9 pages, 3 figures | Particles 2020, 3, 355-363 | 10.3390/particles3020027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The article considers a new mechanism of charge accumulation in the early
Universe in theories with compact extra dimensions. The relaxation processes in
the extra space metric that take place during its formation lead to the
establishment of symmetrical extra space configuration. As a result, the
initial accumulatio... | [
{
"created": "Tue, 2 Jun 2020 01:12:24 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jul 2020 17:07:30 GMT",
"version": "v2"
}
] | 2022-04-08 | [
[
"Nikulin",
"V. V.",
""
],
[
"Rubin",
"S. G.",
""
],
[
"Petryakova",
"P. M.",
""
]
] | The article considers a new mechanism of charge accumulation in the early Universe in theories with compact extra dimensions. The relaxation processes in the extra space metric that take place during its formation lead to the establishment of symmetrical extra space configuration. As a result, the initial accumulation ... |
gr-qc/9811078 | K. Savvidou | Konstantina Savvidou | The action operator for continuous-time histories | 26 pages, 1 figure, LaTEX ; discussion extended and clarified,
presentation of arguments made more explicit, minor errors corrected | J.Math.Phys. 40 (1999) 5657-5674 | 10.1063/1.533050 | Imperial/TP/99-00/13 | gr-qc | null | We define the action operator in the consistent histories formalism, as the
quantum analogue of the classical action functional, for the simple harmonic
oscillator case. The action operator is shown to be the generator of time
transformations, and to be associated with the two types of time-evolution of
the standard ... | [
{
"created": "Mon, 23 Nov 1998 15:15:29 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Nov 1998 21:21:33 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Mar 1999 16:59:18 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Savvidou",
"Konstantina",
""
]
] | We define the action operator in the consistent histories formalism, as the quantum analogue of the classical action functional, for the simple harmonic oscillator case. The action operator is shown to be the generator of time transformations, and to be associated with the two types of time-evolution of the standard qu... |
2103.03714 | Christiane Klein | Christiane Klein and Jochen Zahn and Stefan Hollands | Quantum (dis)charge of black hole interiors | 6 pages, 2 figures, version as published in PRL | Phys. Rev. Lett. 127 (2021) 23, 231301 | 10.1103/PhysRevLett.127.231301 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We analyze the "vacuum" polarization induced by a quantum charged scalar
field near the inner horizon of a charged (Reissner-Nordstr\"om-de Sitter)
black hole in quantum states that start out as regular states near an initial
Cauchy surface. Contrary to the outer (i.e. event-) horizon, where polarization
effects lead... | [
{
"created": "Fri, 5 Mar 2021 14:45:04 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Dec 2021 08:07:56 GMT",
"version": "v2"
}
] | 2021-12-08 | [
[
"Klein",
"Christiane",
""
],
[
"Zahn",
"Jochen",
""
],
[
"Hollands",
"Stefan",
""
]
] | We analyze the "vacuum" polarization induced by a quantum charged scalar field near the inner horizon of a charged (Reissner-Nordstr\"om-de Sitter) black hole in quantum states that start out as regular states near an initial Cauchy surface. Contrary to the outer (i.e. event-) horizon, where polarization effects lead t... |
gr-qc/0311035 | Brian Edgar | S. Brian Edgar | On the structure of the new electromagnetic conservation laws | null | Class.Quant.Grav. 21 (2004) L21-L26 | 10.1088/0264-9381/21/4/L04 | null | gr-qc | null | New electromagnetic conservation laws have recently been proposed: in the
absence of electromagnetic currents, the trace of the Chevreton superenergy
tensor, $H_{ab}$ is divergence-free in four-dimensional (a) Einstein spacetimes
for test fields, (b) Einstein-Maxwell spacetimes. Subsequently it has been
pointed out, ... | [
{
"created": "Tue, 11 Nov 2003 13:13:18 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Edgar",
"S. Brian",
""
]
] | New electromagnetic conservation laws have recently been proposed: in the absence of electromagnetic currents, the trace of the Chevreton superenergy tensor, $H_{ab}$ is divergence-free in four-dimensional (a) Einstein spacetimes for test fields, (b) Einstein-Maxwell spacetimes. Subsequently it has been pointed out, in... |
2002.11496 | Barak Kol | Barak Kol | Flux-based statistical prediction of three-body outcomes | 32 pages. Version prepared for publication | null | 10.1007/s10569-021-10015-x | null | gr-qc astro-ph.EP hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational three-body problem is a rich open problem, dating back to
Newton. It serves as a prototypical example of a chaotic system and has
numerous applications in astrophysics. Generically, the motion is
non-integrable and susceptible to disintegration, and for negative total energy
the decay outcome is a f... | [
{
"created": "Mon, 24 Feb 2020 23:51:32 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Apr 2020 09:26:40 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Apr 2020 15:52:17 GMT",
"version": "v3"
},
{
"created": "Mon, 15 Jun 2020 21:04:40 GMT",
"version": "v4"
},
{
"cr... | 2021-04-14 | [
[
"Kol",
"Barak",
""
]
] | The gravitational three-body problem is a rich open problem, dating back to Newton. It serves as a prototypical example of a chaotic system and has numerous applications in astrophysics. Generically, the motion is non-integrable and susceptible to disintegration, and for negative total energy the decay outcome is a fre... |
gr-qc/0405013 | Leonardo Fernandez-Jambrina | L. Fernandez-Jambrina, L.M. Gonzalez-Romero | Non-singular G2 stiff fluid cosmologies | 17 pages, LaTeX2e | J.Math.Phys. 45 (2004) 2113-2123 | 10.1063/1.1705715 | null | gr-qc | null | In this paper we analyse Abelian diagonal orthogonally transitive spacetimes
with spacelike orbits for which the matter content is a stiff perfect fluid.
The Einstein equations are cast in a suitable form for determining their
geodesic completeness. A sufficient condition on the metric of these spacetimes
is obtained... | [
{
"created": "Mon, 3 May 2004 12:34:29 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Fernandez-Jambrina",
"L.",
""
],
[
"Gonzalez-Romero",
"L. M.",
""
]
] | In this paper we analyse Abelian diagonal orthogonally transitive spacetimes with spacelike orbits for which the matter content is a stiff perfect fluid. The Einstein equations are cast in a suitable form for determining their geodesic completeness. A sufficient condition on the metric of these spacetimes is obtained, ... |
1403.4364 | Tsutomu Kobayashi | Tsutomu Kobayashi, Norihiro Tanahashi | Exact black hole solutions in shift symmetric scalar-tensor theories | 10 pages. v2: Corrected an erroneous statement in the first version.
Matches version accepted by PTEP | null | 10.1093/ptep/ptu096 | RUP-14-7, IPMU14-0057 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a variety of exact black hole solutions in a subclass of
Horndeski's scalar-tensor theory possessing shift symmetry, $\phi\to\phi+c$,
and reflection symmetry, $\phi\to-\phi$. The theory admits two arbitrary
functions of $X:=-(\partial\phi)^2/2$, and our solutions are constructed
without specifying the concr... | [
{
"created": "Tue, 18 Mar 2014 07:24:03 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jul 2014 08:06:16 GMT",
"version": "v2"
}
] | 2014-07-09 | [
[
"Kobayashi",
"Tsutomu",
""
],
[
"Tanahashi",
"Norihiro",
""
]
] | We derive a variety of exact black hole solutions in a subclass of Horndeski's scalar-tensor theory possessing shift symmetry, $\phi\to\phi+c$, and reflection symmetry, $\phi\to-\phi$. The theory admits two arbitrary functions of $X:=-(\partial\phi)^2/2$, and our solutions are constructed without specifying the concret... |
gr-qc/0412091 | Cosimo Stornaiolo | V.I.Man'ko, G.Marmo and C.Stornaiolo | Cosmological dynamics in tomographic probability representation | 16 pages | Gen.Rel.Grav. 37 (2005) 2003-2014 | 10.1007/s10714-005-0161-5 | null | gr-qc | null | The probability representation for quantum states of the universe in which
the states are described by a fair probability distribution instead of wave
function (or density matrix) is developed to consider cosmological dynamics.
The evolution of the universe state is described by standard positive
transition probabili... | [
{
"created": "Mon, 20 Dec 2004 15:47:46 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Man'ko",
"V. I.",
""
],
[
"Marmo",
"G.",
""
],
[
"Stornaiolo",
"C.",
""
]
] | The probability representation for quantum states of the universe in which the states are described by a fair probability distribution instead of wave function (or density matrix) is developed to consider cosmological dynamics. The evolution of the universe state is described by standard positive transition probability... |
2402.15517 | Yan Peng | Guohua Liu, Yan Peng | Upper bound on the radius of the innermost photonsphere in the regular
compact star spacetime | 7 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study properties of the innermost photonsphere in the regular compact star
background. We take the traceless energy-momentum tensor and dominant energy
conditions. In the regular compact star background, we analytically obtain an
upper bound on the radius of the innermost photonsphere as
$r_{\gamma}^{in}\leqslant ... | [
{
"created": "Fri, 9 Feb 2024 16:08:01 GMT",
"version": "v1"
}
] | 2024-02-27 | [
[
"Liu",
"Guohua",
""
],
[
"Peng",
"Yan",
""
]
] | We study properties of the innermost photonsphere in the regular compact star background. We take the traceless energy-momentum tensor and dominant energy conditions. In the regular compact star background, we analytically obtain an upper bound on the radius of the innermost photonsphere as $r_{\gamma}^{in}\leqslant \f... |
gr-qc/9505027 | August Romeo | Emili Elizalde, Sergei D. Odintsov and August Romeo | Zeta-Regularization of the O(N) Non-Linear Sigma Model in D dimensions | 26 pages | J.Math.Phys.37:1128-1147,1996 | 10.1063/1.531437 | CEAB-5/95-1 | gr-qc | null | The O(N) non-linear sigma model in a $D$-dimensional space of the form ${\bf
R}^{D-M} \times {\bf T}^M$, ${\bf R}^{D-M} \times {\bf S}^M$, or ${\bf T}^M
\times {\bf S}^P$ is studied, where ${\bf R}^M$, ${\bf T}^M$ and ${\bf S}^M$
correspond to flat space, a torus and a sphere, respectively. Using zeta
regularization ... | [
{
"created": "Wed, 17 May 1995 19:00:40 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Nov 1995 11:30:14 GMT",
"version": "v2"
}
] | 2009-09-17 | [
[
"Elizalde",
"Emili",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Romeo",
"August",
""
]
] | The O(N) non-linear sigma model in a $D$-dimensional space of the form ${\bf R}^{D-M} \times {\bf T}^M$, ${\bf R}^{D-M} \times {\bf S}^M$, or ${\bf T}^M \times {\bf S}^P$ is studied, where ${\bf R}^M$, ${\bf T}^M$ and ${\bf S}^M$ correspond to flat space, a torus and a sphere, respectively. Using zeta regularization an... |
1805.10565 | Ernesto Contreras | Ernesto Contreras and Pedro Bargue\~no | Minimal geometric deformation decoupling in $2+1$ dimensional
space-times | Figure and some comments added. Accepted in EPJC | Eur. Phys. J. C (2018) 78: 558 | 10.1140/epjc/s10052-018-6048-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the minimal geometric deformation decoupling in $2+1$ dimensional
space--times and implement it as a tool for obtaining anisotropic solutions
from isotropic geometries. Interestingly, both the isotropic and the
anisotropic sector fulfill Einstein field equations in contrast to the cases
studied in $3+1$ dime... | [
{
"created": "Sun, 27 May 2018 02:02:54 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jul 2018 20:22:21 GMT",
"version": "v2"
}
] | 2019-07-03 | [
[
"Contreras",
"Ernesto",
""
],
[
"Bargueño",
"Pedro",
""
]
] | We study the minimal geometric deformation decoupling in $2+1$ dimensional space--times and implement it as a tool for obtaining anisotropic solutions from isotropic geometries. Interestingly, both the isotropic and the anisotropic sector fulfill Einstein field equations in contrast to the cases studied in $3+1$ dimens... |
gr-qc/9504041 | null | G.M. Shore | ``Faster than Light'' Photons in Gravitational Fields -- Causality,
Anomalies and Horizons | 15 pages, Plain TeX | Nucl.Phys. B460 (1996) 379-396 | 10.1016/0550-3213(95)00646-X | SWAT-95/70 | gr-qc hep-ph | null | A number of general issues relating to superluminal photon propagation in
gravitational fields are explored. The possibility of superluminal, yet causal,
photon propagation arises because of Equivalence Principle violating
interactions induced by vacuum polarisation in QED in curved spacetime. Two
general theorems ar... | [
{
"created": "Tue, 25 Apr 1995 16:22:56 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Shore",
"G. M.",
""
]
] | A number of general issues relating to superluminal photon propagation in gravitational fields are explored. The possibility of superluminal, yet causal, photon propagation arises because of Equivalence Principle violating interactions induced by vacuum polarisation in QED in curved spacetime. Two general theorems are ... |
gr-qc/9805008 | Patrick R. Brady | Patrick R Brady, Serge Droz, and Sharon M Morsink | The late-time singularity inside non-spherical black holes | 16 pages, RevTeX, 3 figures included using psfig | Phys.Rev. D58 (1998) 084034 | 10.1103/PhysRevD.58.084034 | GRP-491 | gr-qc | null | It was long believed that the singularity inside a realistic, rotating black
hole must be spacelike. However, studies of the internal geometry of black
holes indicate a more complicated structure is typical. While it seems likely
that an observer falling into a black hole with the collapsing star encounters
a crushin... | [
{
"created": "Tue, 5 May 1998 04:14:55 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Brady",
"Patrick R",
""
],
[
"Droz",
"Serge",
""
],
[
"Morsink",
"Sharon M",
""
]
] | It was long believed that the singularity inside a realistic, rotating black hole must be spacelike. However, studies of the internal geometry of black holes indicate a more complicated structure is typical. While it seems likely that an observer falling into a black hole with the collapsing star encounters a crushing ... |
2111.03214 | Dao-Jun Liu | Liang Meng and Dao-Jun Liu | Tidal Love numbers of neutron stars in Rastall gravity | 6 pages, 2 figures, accepted for publication in Astrophys Space Sci | Astrophys Space Sci 366, 105 (2021) | 10.1007/s10509-021-04013-6 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave measurements of the tidal deformability of neutron stars
could reveal important information regarding their internal structure, the
equation of state of high-dense nuclear matter and gravity in strong field
regime. In this work, we extend the relativistic theory of the tidal
deformability of neutro... | [
{
"created": "Fri, 5 Nov 2021 01:55:29 GMT",
"version": "v1"
}
] | 2021-11-16 | [
[
"Meng",
"Liang",
""
],
[
"Liu",
"Dao-Jun",
""
]
] | Gravitational-wave measurements of the tidal deformability of neutron stars could reveal important information regarding their internal structure, the equation of state of high-dense nuclear matter and gravity in strong field regime. In this work, we extend the relativistic theory of the tidal deformability of neutron ... |
1407.3612 | Marcos Brum | Marcos Brum | Explicit construction of Hadamard states for Quantum Field Theory in
curved spacetimes | PhD Thesis. 129+16 pages. Cataloging in Publication and cover
information in Portuguese. Abstract in both Portuguese and English. arXiv
admin note: text overlap with arXiv:0907.1034 by other authors | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this Thesis we will explicitly construct Hadamard states with different
features. In the two first cases, the states will be constructed in static and
in cosmological spacetimes. In one of the cases, the states will be constructed
in such a way as to minimize the expectation value of the energy-momentum
tensor of ... | [
{
"created": "Mon, 14 Jul 2014 11:42:47 GMT",
"version": "v1"
}
] | 2014-07-15 | [
[
"Brum",
"Marcos",
""
]
] | In this Thesis we will explicitly construct Hadamard states with different features. In the two first cases, the states will be constructed in static and in cosmological spacetimes. In one of the cases, the states will be constructed in such a way as to minimize the expectation value of the energy-momentum tensor of a ... |
gr-qc/9408018 | Ulrich Alfes | Ulrich Alfes and Henning M\"uller zum Hagen | Spherically Symmetric Event Horizons and Trapped Surfaces Developing
{}from Innociuous Data | 18 pages, uuencoded compressed PostScript (160KB), incl. 2 figures | Class.Quant.Grav.11:2705-2722,1994 | 10.1088/0264-9381/11/11/012 | null | gr-qc | null | In this paper we show the existence of a large class of spherically symmetric
data $d$ (on a spacelike hypersurface $S$), from which a perfect fluid
spacetime (surrounded by vacuum) develops. This spacetime contains an event
horizon (with trapped surfaces behind it). The data $d$ are regular and {\it
innociuous}, i.e... | [
{
"created": "Mon, 15 Aug 1994 14:42:44 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Alfes",
"Ulrich",
""
],
[
"Hagen",
"Henning Müller zum",
""
]
] | In this paper we show the existence of a large class of spherically symmetric data $d$ (on a spacelike hypersurface $S$), from which a perfect fluid spacetime (surrounded by vacuum) develops. This spacetime contains an event horizon (with trapped surfaces behind it). The data $d$ are regular and {\it innociuous}, i.e. ... |
1803.11444 | Gilles Esposito-Farese | Eugeny Babichev, Christos Charmousis, Gilles Esposito-Farese and
Antoine Leh\'ebel | Hamiltonian vs stability and application to Horndeski theory | 32 pages, 2 figures; v2: covariant writing of the stability criterion
added in Eqs. (10)-(12) | Phys. Rev. D 98, 104050 (2018) | 10.1103/PhysRevD.98.104050 | LPT-Orsay-18-57 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Hamiltonian density bounded from below implies that the lowest-energy state
is stable. We point out, contrary to common lore, that an unbounded Hamiltonian
density does not necessarily imply an instability: Stability is indeed a
coordinate-independent property, whereas the Hamiltonian density does depend on
the cho... | [
{
"created": "Fri, 30 Mar 2018 13:30:48 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Dec 2018 13:40:34 GMT",
"version": "v2"
}
] | 2018-12-12 | [
[
"Babichev",
"Eugeny",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Esposito-Farese",
"Gilles",
""
],
[
"Lehébel",
"Antoine",
""
]
] | A Hamiltonian density bounded from below implies that the lowest-energy state is stable. We point out, contrary to common lore, that an unbounded Hamiltonian density does not necessarily imply an instability: Stability is indeed a coordinate-independent property, whereas the Hamiltonian density does depend on the choic... |
gr-qc/0503084 | Harold Blas | A. Accioly and H. Blas | Metric-scalar gravity with torsion and the measurability of the
non-minimal coupling | 10 pages, LaTex. Accepted for publication in Mod. Phys. Lett. A | Mod.Phys.Lett.A22:961-970,2007 | 10.1142/S0217732307021378 | null | gr-qc | null | The "measurability" of the non-minimal coupling is discussed by considering
the correction to the Newtonian static potential in the semi-classical
approach. The coefficient of the "gravitational Darwin term" (GDT) gets
redefined by the non-minimal torsion-scalar couplings. Based on a similar
analysis of the GDT in th... | [
{
"created": "Sat, 19 Mar 2005 19:03:59 GMT",
"version": "v1"
},
{
"created": "Wed, 3 May 2006 03:35:48 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Aug 2006 01:37:43 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Accioly",
"A.",
""
],
[
"Blas",
"H.",
""
]
] | The "measurability" of the non-minimal coupling is discussed by considering the correction to the Newtonian static potential in the semi-classical approach. The coefficient of the "gravitational Darwin term" (GDT) gets redefined by the non-minimal torsion-scalar couplings. Based on a similar analysis of the GDT in the ... |
1404.6798 | Eric Poisson | Philippe Landry and Eric Poisson | Relativistic theory of surficial Love numbers | 12 pages, 2 figures | null | 10.1103/PhysRevD.89.124011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A relativistic theory of surficial Love numbers, which characterize the
surface deformation of a body subjected to tidal forces, was initiated by
Damour and Nagar. We revisit this effort in order to extend it, clarify some of
its aspects, and simplify its computational implementation. First, we refine
the definition ... | [
{
"created": "Sun, 27 Apr 2014 17:44:32 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Landry",
"Philippe",
""
],
[
"Poisson",
"Eric",
""
]
] | A relativistic theory of surficial Love numbers, which characterize the surface deformation of a body subjected to tidal forces, was initiated by Damour and Nagar. We revisit this effort in order to extend it, clarify some of its aspects, and simplify its computational implementation. First, we refine the definition of... |
2401.09784 | Yaghoub Heydarzade | Metin G\"urses, Yaghoub Heydarzade and \c{C}etin \c{S}ent\"urk | Geometric Perfect Fluids and Dark Side of the Universe | 27 pages, 4 figures, published version | Phys. Rev. D 110, 024073 (2024) | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recently we showed that in FLRW cosmology, the contribution from higher
curvature terms in any generic metric gravity theory to the energy-momentum
tensor is of the perfect fluid form. Such a geometric perfect fluid can be
interpreted as a fluid remaining from the beginning of the universe where the
string theory is ... | [
{
"created": "Thu, 18 Jan 2024 08:07:08 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Aug 2024 07:54:53 GMT",
"version": "v2"
}
] | 2024-08-07 | [
[
"Gürses",
"Metin",
""
],
[
"Heydarzade",
"Yaghoub",
""
],
[
"Şentürk",
"Çetin",
""
]
] | Recently we showed that in FLRW cosmology, the contribution from higher curvature terms in any generic metric gravity theory to the energy-momentum tensor is of the perfect fluid form. Such a geometric perfect fluid can be interpreted as a fluid remaining from the beginning of the universe where the string theory is th... |
2405.00594 | Elijah Sanderson | Elijah Sanderson, Rachel Lash Maitra, AJ Liberatore | Anomalous diffusion and factor ordering in (1+1)-dimensional Lorentzian
quantum gravity | null | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Using properties of diffusion according to a quantum heat kernel constructed
as an expectation over classical heat kernels on $S^1$, we probe the
non-manifold-like nature of quantized space in a model of (1+1)-dimensional
quantum gravity. By computing the mean squared displacement of a diffusing
particle, we find tha... | [
{
"created": "Wed, 1 May 2024 16:01:37 GMT",
"version": "v1"
}
] | 2024-05-02 | [
[
"Sanderson",
"Elijah",
""
],
[
"Maitra",
"Rachel Lash",
""
],
[
"Liberatore",
"AJ",
""
]
] | Using properties of diffusion according to a quantum heat kernel constructed as an expectation over classical heat kernels on $S^1$, we probe the non-manifold-like nature of quantized space in a model of (1+1)-dimensional quantum gravity. By computing the mean squared displacement of a diffusing particle, we find that ... |
0906.2409 | Timothy Adamo | T.M. Adamo, E.T. Newman | Asymptotically Stationary and Static Space-times and Shear-free Null
Geodesic Congruences | 11 pages | Class.Quant.Grav. 26: 155003, 2009 | 10.1088/0264-9381/26/15/155003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In classical electromagnetic theory, one formally defines the complex dipole
moment (the electric plus 'i' magnetic dipole) and then computes (and defines)
the complex center of charge by transforming to a complex frame where the
complex dipole moment vanishes. Analogously in asymptotically flat space-times
it has be... | [
{
"created": "Fri, 12 Jun 2009 19:53:42 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Adamo",
"T. M.",
""
],
[
"Newman",
"E. T.",
""
]
] | In classical electromagnetic theory, one formally defines the complex dipole moment (the electric plus 'i' magnetic dipole) and then computes (and defines) the complex center of charge by transforming to a complex frame where the complex dipole moment vanishes. Analogously in asymptotically flat space-times it has been... |
0708.2537 | Rickard Jonsson | Rickard Jonsson | Optical geometry across the horizon | 15 pages, 10 figures | Class.Quant.Grav.23:77-89,2006 | 10.1088/0264-9381/23/1/004 | null | gr-qc | null | In a companion paper (Jonsson and Westman, Class. Quantum Grav. 23 (2006)
61), a generalization of optical geometry, assuming a non-shearing reference
congruence, is discussed. Here we illustrate that this formalism can be applied
to a finite four-volume of any spherically symmetric spacetime. In particular
we apply ... | [
{
"created": "Sun, 19 Aug 2007 11:13:28 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Jonsson",
"Rickard",
""
]
] | In a companion paper (Jonsson and Westman, Class. Quantum Grav. 23 (2006) 61), a generalization of optical geometry, assuming a non-shearing reference congruence, is discussed. Here we illustrate that this formalism can be applied to a finite four-volume of any spherically symmetric spacetime. In particular we apply th... |
2212.12052 | Jean-Baptiste Bayle | Lennart Wissel, Olaf Hartwig, Jean-Baptiste Bayle, Martin Staab, Ewan
D. Fitzsimons, Martin Hewitson, Gerhard Heinzel | The influence of laser relative intensity noise in the Laser
Interferometer Space Antenna | 15 pages, 10 figures, 2 tables | Phys. Rev. Applied 20, 014016, 10 July 2023 | 10.1103/PhysRevApplied.20.014016 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LISA is an upcoming ESA mission that will detect gravitational waves in space
by interferometrically measuring the separation between free-falling test
masses at picometer precision. To reach the desired performance, LISA will
employ the noise reduction technique time-delay interferometry (TDI), in which
multiple raw... | [
{
"created": "Thu, 22 Dec 2022 22:04:52 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Jan 2023 13:44:10 GMT",
"version": "v2"
}
] | 2023-11-23 | [
[
"Wissel",
"Lennart",
""
],
[
"Hartwig",
"Olaf",
""
],
[
"Bayle",
"Jean-Baptiste",
""
],
[
"Staab",
"Martin",
""
],
[
"Fitzsimons",
"Ewan D.",
""
],
[
"Hewitson",
"Martin",
""
],
[
"Heinzel",
"Gerhard",
""
... | LISA is an upcoming ESA mission that will detect gravitational waves in space by interferometrically measuring the separation between free-falling test masses at picometer precision. To reach the desired performance, LISA will employ the noise reduction technique time-delay interferometry (TDI), in which multiple raw i... |
1808.08804 | Tichomir Tenev | T. G. Tenev and M. F. Horstemeyer | Recovering the Principle of Relativity from the Cosmic Fabric Model of
Space | null | Reports in Advances of Physical Sciences 02 (2018) 1850011 | 10.1142/S2424942418500111 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the descriptive power of the Cosmic Fabric model of space developed
by Tenev and Horstemeyer (2018) to include moving observers by demonstrating
that all reference frames are phenomenologically equivalent with one another
and transform between each other via the Lorentz transformations. Our approach
is simi... | [
{
"created": "Wed, 22 Aug 2018 20:00:28 GMT",
"version": "v1"
}
] | 2019-02-13 | [
[
"Tenev",
"T. G.",
""
],
[
"Horstemeyer",
"M. F.",
""
]
] | We extend the descriptive power of the Cosmic Fabric model of space developed by Tenev and Horstemeyer (2018) to include moving observers by demonstrating that all reference frames are phenomenologically equivalent with one another and transform between each other via the Lorentz transformations. Our approach is simila... |
1702.06793 | Hongguang Liu | Hongguang Liu, Karim Noui | Gravity as an SU(1,1) gauge theory in four dimensions | 19 pages, 2 figures | null | 10.1088/1361-6382/aa7348 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We start with the Hamiltonian formulation of the first order action of pure
gravity with a full $\mathfrak{sl}(2,\mathbb C)$ internal gauge symmetry. We
make a partial gauge-fixing which reduces $\mathfrak{sl}(2,\mathbb C)$ to its
sub-algebra $\mathfrak{su}(1,1)$. This case corresponds to a splitting of the
space-tim... | [
{
"created": "Wed, 22 Feb 2017 13:35:19 GMT",
"version": "v1"
}
] | 2017-06-28 | [
[
"Liu",
"Hongguang",
""
],
[
"Noui",
"Karim",
""
]
] | We start with the Hamiltonian formulation of the first order action of pure gravity with a full $\mathfrak{sl}(2,\mathbb C)$ internal gauge symmetry. We make a partial gauge-fixing which reduces $\mathfrak{sl}(2,\mathbb C)$ to its sub-algebra $\mathfrak{su}(1,1)$. This case corresponds to a splitting of the space-time ... |
gr-qc/0106011 | Vladimir S. Manko | J.A. Aguilar-Sanchez, A.A. Garcia and V.S. Manko | Demianski-Newman solution revisited | 9 pages, no figures. Accepted for publication in Gravitation and
Cosmology | Grav.Cosmol. 7 (2001) 149-152 | null | null | gr-qc | null | The derivation of the Demianski-Newman solution within the framework of the
Ernst complex formalism is considered. We show that this solution naturally
arises as a two-soliton specialization of the axisymmetric multi-soliton
electrovacuum metric, and we work out the full set of the corresponding
metrical fields and e... | [
{
"created": "Mon, 4 Jun 2001 20:51:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Aguilar-Sanchez",
"J. A.",
""
],
[
"Garcia",
"A. A.",
""
],
[
"Manko",
"V. S.",
""
]
] | The derivation of the Demianski-Newman solution within the framework of the Ernst complex formalism is considered. We show that this solution naturally arises as a two-soliton specialization of the axisymmetric multi-soliton electrovacuum metric, and we work out the full set of the corresponding metrical fields and ele... |
2112.13921 | Archil Kobakhidze | Archil Kobakhidze and Zachary S. C. Picker | Apparent horizons of the Thakurta spacetime and the description of
cosmological black holes | 4 pages | null | 10.1140/epjc/s10052-022-10312-1 | CPPC-2021-11 | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We discuss the validity of the Thakurta metric to describe cosmological black
holes by analysing the nature of its horizon. By adopting the preferred
foliation of the Thakurta spacetime associated with the Kodama time, we
demonstrate that the Thakurta horizon is indeed a future outer trapping
horizon. Therefore, the ... | [
{
"created": "Mon, 27 Dec 2021 22:16:45 GMT",
"version": "v1"
}
] | 2022-05-04 | [
[
"Kobakhidze",
"Archil",
""
],
[
"Picker",
"Zachary S. C.",
""
]
] | We discuss the validity of the Thakurta metric to describe cosmological black holes by analysing the nature of its horizon. By adopting the preferred foliation of the Thakurta spacetime associated with the Kodama time, we demonstrate that the Thakurta horizon is indeed a future outer trapping horizon. Therefore, the re... |
2311.02448 | Javlon Rayimbaev Javlon | Y. Sekhmani, J. Rayimbaev, G. G. Luciano, R. Myrzakulov, D. J. Gogoi | Phase structure of charged AdS black holes surrounded by exotic fluid
with modified Chaplygin equation of state | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By considering the concept of the modified Chaplygin gas (MCG) as a single
fluid model unifying dark energy and dark matter, we construct a static,
spherically charged black hole (BH) solution in the framework of General
Relativity. The $P-V$ criticality of the charged anti-de Sitter (AdS) BH with a
surrounding MCG i... | [
{
"created": "Sat, 4 Nov 2023 16:27:04 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Dec 2023 05:54:37 GMT",
"version": "v2"
}
] | 2023-12-04 | [
[
"Sekhmani",
"Y.",
""
],
[
"Rayimbaev",
"J.",
""
],
[
"Luciano",
"G. G.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Gogoi",
"D. J.",
""
]
] | By considering the concept of the modified Chaplygin gas (MCG) as a single fluid model unifying dark energy and dark matter, we construct a static, spherically charged black hole (BH) solution in the framework of General Relativity. The $P-V$ criticality of the charged anti-de Sitter (AdS) BH with a surrounding MCG is ... |
2106.11764 | Yunho Kim | Yunho Kim and Archil Kobakhidze | Non-Schwarzschild Primordial Black Holes as Dark Matter in Quadratic
Gravity | 6 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One-loop renormalised quantum effective action for gravity contains quadratic
in curvature terms. We have found an approximate analytic black hole solution
in quadratic gravity by keeping only the radial spherically symmetric
fluctuations and dimensionally reducing the 4-dimensional (4D) theory down to
the 2-dimensio... | [
{
"created": "Mon, 21 Jun 2021 02:47:19 GMT",
"version": "v1"
}
] | 2021-06-23 | [
[
"Kim",
"Yunho",
""
],
[
"Kobakhidze",
"Archil",
""
]
] | One-loop renormalised quantum effective action for gravity contains quadratic in curvature terms. We have found an approximate analytic black hole solution in quadratic gravity by keeping only the radial spherically symmetric fluctuations and dimensionally reducing the 4-dimensional (4D) theory down to the 2-dimensiona... |
gr-qc/0003085 | Julio Cesar Fabris | J.C. Fabris, S.V.B. Goncalves and N.A. Tomimura | An analysis of cosmological perturbations in hydrodynamical and field
representations | Latex file, 18 pages | Class.Quant.Grav. 17 (2000) 2983-2998 | 10.1088/0264-9381/17/15/309 | null | gr-qc | null | Density fluctuations of fluids with negative pressure exhibit decreasing time
behaviour in the long wavelength limit, but are strongly unstable in the small
wavelength limit when a hydrodynamical approach is used. On the other hand, the
corresponding gravitational waves are well behaved. We verify that the
instabilit... | [
{
"created": "Tue, 21 Mar 2000 18:19:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Fabris",
"J. C.",
""
],
[
"Goncalves",
"S. V. B.",
""
],
[
"Tomimura",
"N. A.",
""
]
] | Density fluctuations of fluids with negative pressure exhibit decreasing time behaviour in the long wavelength limit, but are strongly unstable in the small wavelength limit when a hydrodynamical approach is used. On the other hand, the corresponding gravitational waves are well behaved. We verify that the instabilitie... |
gr-qc/0508056 | Willians Barreto | W. Barreto, J. Ovalle and B. Rodriguez | A self-similar dynamics in viscous spheres | 15 pages, 4 figures | Gen.Rel.Grav. 30 (1998) 15 | 10.1023/A:1018812714524 | null | gr-qc | null | We study the evolution of radiating and viscous fluid spheres assuming an
additional homothetic symmetry on the spherically simmetric space--time. We
match a very simple solution to the symmetry equations with the exterior one
(Vaidya). We then obtain a system of two ordinary differential equations which
rule the dyn... | [
{
"created": "Fri, 12 Aug 2005 21:55:06 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Barreto",
"W.",
""
],
[
"Ovalle",
"J.",
""
],
[
"Rodriguez",
"B.",
""
]
] | We study the evolution of radiating and viscous fluid spheres assuming an additional homothetic symmetry on the spherically simmetric space--time. We match a very simple solution to the symmetry equations with the exterior one (Vaidya). We then obtain a system of two ordinary differential equations which rule the dynam... |
2202.08848 | Davide Gerosa | Davide Gerosa, Cecilia Maria Fabbri, Ulrich Sperhake | The irreducible mass and the horizon area of LIGO's black holes | 14 pages, 6 figures | Class. Quant. Grav. 39 (2022) 175008 | 10.1088/1361-6382/ac8332 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mass of a Kerr black hole can be separated into irreducible and
rotational components -the former is a lower limit to the energy that cannot be
possibly extracted from the event horizon and is related to its area. Here we
compute the irreducible masses of the stellar-mass black holes observed by
gravitational-wav... | [
{
"created": "Thu, 17 Feb 2022 19:00:02 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Aug 2022 08:46:39 GMT",
"version": "v2"
}
] | 2022-08-23 | [
[
"Gerosa",
"Davide",
""
],
[
"Fabbri",
"Cecilia Maria",
""
],
[
"Sperhake",
"Ulrich",
""
]
] | The mass of a Kerr black hole can be separated into irreducible and rotational components -the former is a lower limit to the energy that cannot be possibly extracted from the event horizon and is related to its area. Here we compute the irreducible masses of the stellar-mass black holes observed by gravitational-wave ... |
gr-qc/9706066 | Stanislav Alexeyev | S.O. Alexeyev and M.V. Pomazanov (Moscow State University) | Singular Regions in Black Hole Solutions in Higher Order Curvature
Gravity | 18 pages, RevTeX 3.0, 3 PostScript figures (epsf.sty), submitted to
Phys. Rev. D; new references are added | null | null | null | gr-qc hep-th | null | Four-dimensional black hole solutions generated by the low energy string
effective action are investigated outside and inside the event horizon. A
restriction for a minimal black hole size is obtained in the frame of the model
discussed. Intersections, turning points and other singular points of the
solution are inve... | [
{
"created": "Sat, 21 Jun 1997 09:11:52 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jun 1997 19:44:18 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Alexeyev",
"S. O.",
"",
"Moscow State University"
],
[
"Pomazanov",
"M. V.",
"",
"Moscow State University"
]
] | Four-dimensional black hole solutions generated by the low energy string effective action are investigated outside and inside the event horizon. A restriction for a minimal black hole size is obtained in the frame of the model discussed. Intersections, turning points and other singular points of the solution are invest... |
1905.12187 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu | Reduced thermodynamics and an exact phase transition of five-dimensional
Kerr-AdS black holes with equal spin parameters | 14 pages, 5 figures, and 1 table | Phys. Rev. D 100, 064004 (2019) | 10.1103/PhysRevD.100.064004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Multi-spinning higher dimensional Kerr-AdS black holes admit the stable
small-large black hole phase transition of van der Waals type. In this paper,
we study the exact critical phenomena and phase structure in five-dimensional
spacetime. First, we examine the thermodynamic laws in the reduced parameter
space and fin... | [
{
"created": "Wed, 29 May 2019 02:48:47 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Sep 2019 05:37:18 GMT",
"version": "v2"
}
] | 2019-09-27 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Multi-spinning higher dimensional Kerr-AdS black holes admit the stable small-large black hole phase transition of van der Waals type. In this paper, we study the exact critical phenomena and phase structure in five-dimensional spacetime. First, we examine the thermodynamic laws in the reduced parameter space and find ... |
0909.3456 | Sabine Hossenfelder | Sabine Hossenfelder | Antigravitation | This is the summary of a talk given at the 17th International
Conference on Supersymmetry and the Unification of Fundamental Interactions
in Boston, June 2009 | AIP Conf.Proc.1200:1089-1092,2010 | 10.1063/1.3327545 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss why there are no negative gravitational sources in General
Relativity and show that it is possible to extend the classical theory such
that repulsive gravitational interaction occurs.
| [
{
"created": "Fri, 18 Sep 2009 15:00:40 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Hossenfelder",
"Sabine",
""
]
] | We discuss why there are no negative gravitational sources in General Relativity and show that it is possible to extend the classical theory such that repulsive gravitational interaction occurs. |
gr-qc/0506074 | Piotr Bizon | Piotr Bizo\'n, Tadeusz Chmaj, Bernd G. Schmidt | Critical behavior in vacuum gravitational collapse in 4+1 dimensions | 4 pages, 7 figures | Phys.Rev.Lett. 95 (2005) 071102 | 10.1103/PhysRevLett.95.071102 | null | gr-qc | null | We show that the 4+1 dimensional vacuum Einstein equations admit
gravitational waves with radial symmetry. The dynamical degrees of freedom
correspond to deformations of the three-sphere orthogonal to the $(t,r)$ plane.
Gravitational collapse of such waves is studied numerically and shown to
exhibit discretely self-s... | [
{
"created": "Mon, 13 Jun 2005 08:00:30 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Bizoń",
"Piotr",
""
],
[
"Chmaj",
"Tadeusz",
""
],
[
"Schmidt",
"Bernd G.",
""
]
] | We show that the 4+1 dimensional vacuum Einstein equations admit gravitational waves with radial symmetry. The dynamical degrees of freedom correspond to deformations of the three-sphere orthogonal to the $(t,r)$ plane. Gravitational collapse of such waves is studied numerically and shown to exhibit discretely self-sim... |
1009.1486 | Kentaro Tanabe | Kentaro Tanabe, Seiju Ohashi, Tetsuya Shiromizu | Multipole moments for black objects in five dimensions | 14 pages, 8 figures, published version in PRD | Phys.Rev.D82:104042,2010 | 10.1103/PhysRevD.82.104042 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In higher dimensions than four, conventional uniqueness theorem in
asymptotically flat space-times does not hold, i.e., black objects can not be
classified only by the mass, angular momentum and charge. In this paper, we
define multipole moments for black objects and show that Myers-Perry black hole
and black ring ca... | [
{
"created": "Wed, 8 Sep 2010 09:33:40 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Nov 2010 18:08:48 GMT",
"version": "v2"
}
] | 2010-12-23 | [
[
"Tanabe",
"Kentaro",
""
],
[
"Ohashi",
"Seiju",
""
],
[
"Shiromizu",
"Tetsuya",
""
]
] | In higher dimensions than four, conventional uniqueness theorem in asymptotically flat space-times does not hold, i.e., black objects can not be classified only by the mass, angular momentum and charge. In this paper, we define multipole moments for black objects and show that Myers-Perry black hole and black ring can ... |
1109.1290 | Antonia Zipfel | Emanuele Alesci, Thomas Thiemann, Antonia Zipfel | Linking covariant and canonical LQG: new solutions to the Euclidean
Scalar Constraint | 33 pages, several figures | null | 10.1103/PhysRevD.86.024017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is often emphasized that spin-foam models could realize a projection on
the physical Hilbert space of canonical Loop Quantum Gravity (LQG). As a first
test we analyze the one-vertex expansion of a simple Euclidean spin-foam. We
find that for fixed Barbero-Immirzi parameter \gamma=1 the one vertex-amplitude
in the ... | [
{
"created": "Tue, 6 Sep 2011 20:09:41 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Alesci",
"Emanuele",
""
],
[
"Thiemann",
"Thomas",
""
],
[
"Zipfel",
"Antonia",
""
]
] | It is often emphasized that spin-foam models could realize a projection on the physical Hilbert space of canonical Loop Quantum Gravity (LQG). As a first test we analyze the one-vertex expansion of a simple Euclidean spin-foam. We find that for fixed Barbero-Immirzi parameter \gamma=1 the one vertex-amplitude in the KK... |
1101.2470 | Jose Martinez-Morales L. | Jose L. Martinez-Morales | The Einstein's linear equation of a space-time with a homogeneous
section of low dimension | 8 pages, 0 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein's linear equation of a small perturbation in a space-time with a
homogeneous section of low dimension, is studied. For every harmonic mode of
the horizon, there are two solutions which behave differently at large distance
$r$. In the basic mode, the behavior of one of the solutions is
${{(-{r^2}+{t^2})}^... | [
{
"created": "Thu, 13 Jan 2011 00:44:21 GMT",
"version": "v1"
}
] | 2011-01-14 | [
[
"Martinez-Morales",
"Jose L.",
""
]
] | The Einstein's linear equation of a small perturbation in a space-time with a homogeneous section of low dimension, is studied. For every harmonic mode of the horizon, there are two solutions which behave differently at large distance $r$. In the basic mode, the behavior of one of the solutions is ${{(-{r^2}+{t^2})}^{\... |
1707.00515 | Sadia Nazir | Sadia Nazir and M.A.Faridi | Scattering and Orbiting in Reissner-Nordstrom black hole spacetime | 13 pages and 11 figures are included | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using semi-analytical method,we investigate the transmission and
reflection coefficient and absorption and scattering cross section of spin
0,1,2 particles which are massless from a charged non rotating black holes.
Here orbiting scattering can be characterized of massless particles from
Reissner-Nordstrom black h... | [
{
"created": "Sat, 17 Jun 2017 15:22:09 GMT",
"version": "v1"
}
] | 2017-07-04 | [
[
"Nazir",
"Sadia",
""
],
[
"Faridi",
"M. A.",
""
]
] | By using semi-analytical method,we investigate the transmission and reflection coefficient and absorption and scattering cross section of spin 0,1,2 particles which are massless from a charged non rotating black holes. Here orbiting scattering can be characterized of massless particles from Reissner-Nordstrom black hol... |
2206.00671 | Koutarou Kyutoku | Koutarou Kyutoku, Hayato Motohashi, Takahiro Tanaka | Quasinormal modes of Schwarzschild black holes on the real axis | 16 pages, 8 figures | Phys. Rev. D 107, 044012 (2023) | 10.1103/PhysRevD.107.044012 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the scattering of gravitational waves by a Schwarzschild black hole
and its perturbed siblings to investigate influences of proposed spectral
instability of quasinormal modes on the ringdown signal. Our results indicate
that information of dominant ringdown signals, which are ascribed to the
fundamental (i.e... | [
{
"created": "Wed, 1 Jun 2022 18:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Feb 2023 10:05:38 GMT",
"version": "v2"
}
] | 2023-02-09 | [
[
"Kyutoku",
"Koutarou",
""
],
[
"Motohashi",
"Hayato",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We study the scattering of gravitational waves by a Schwarzschild black hole and its perturbed siblings to investigate influences of proposed spectral instability of quasinormal modes on the ringdown signal. Our results indicate that information of dominant ringdown signals, which are ascribed to the fundamental (i.e.,... |
2104.11848 | Huan Yang | Xuefeng Feng, Zhenwei Lyu, Huan Yang | Black-Hole Perturbation Plus Post-Newtonian Theory: Hybrid Waveform for
Neutron Star Binaries | 20 pages, 5 figures | Phys. Rev. D 105, 104043 (2022) | 10.1103/PhysRevD.105.104043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the motion of nonspinning, compact objects orbiting around a Kerr
black hole with tidal couplings. The tide-induced quadrupole moment modifies
both the orbital energy and outgoing fluxes, so that over the inspiral
timescale there is an accumulative shift in the orbital and gravitational wave
phase. Previo... | [
{
"created": "Sat, 24 Apr 2021 00:57:26 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2021 02:29:47 GMT",
"version": "v2"
}
] | 2022-06-01 | [
[
"Feng",
"Xuefeng",
""
],
[
"Lyu",
"Zhenwei",
""
],
[
"Yang",
"Huan",
""
]
] | We consider the motion of nonspinning, compact objects orbiting around a Kerr black hole with tidal couplings. The tide-induced quadrupole moment modifies both the orbital energy and outgoing fluxes, so that over the inspiral timescale there is an accumulative shift in the orbital and gravitational wave phase. Previous... |
1408.3398 | Muhammad Zaeem Ul Haq Bhatti | M. Sharif and M. Zaeem Ul Haq Bhatti | Gravitational Binding Energy in Charged Cylindrical Symmetry | 9 pages | Can. J. Phys. 90(2012)1233 | 10.1139/p2012-101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider static cylindrically symmetric charged gravitating object with
perfect fluid and investigate the gravitational binding energy. It is found
that only the localized part of the mass function provides the gravitational
binding energy, whereas the non-localized part generated by the electric
coupling does not... | [
{
"created": "Wed, 4 Dec 2013 12:13:10 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Sharif",
"M.",
""
],
[
"Bhatti",
"M. Zaeem Ul Haq",
""
]
] | We consider static cylindrically symmetric charged gravitating object with perfect fluid and investigate the gravitational binding energy. It is found that only the localized part of the mass function provides the gravitational binding energy, whereas the non-localized part generated by the electric coupling does not c... |
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