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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0401010 | Robert Milson | R. Milson, A. Coley, V. Pravda, A. Pravdova | Alignment and algebraically special tensors in Lorentzian geometry | 19 pages. Revised presentation | Int.J.Geom.Meth.Mod.Phys.2:41-61,2005 | 10.1142/S0219887805000491 | null | gr-qc math-ph math.MP | null | We develop a dimension-independent theory of alignment in Lorentzian
geometry, and apply it to the tensor classification problem for the Weyl and
Ricci tensors. First, we show that the alignment condition is equivalent to the
PND equation. In 4D, this recovers the usual Petrov types. For higher
dimensions, we prove t... | [
{
"created": "Sun, 4 Jan 2004 04:21:41 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Mar 2004 23:23:04 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Jul 2004 14:35:45 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Milson",
"R.",
""
],
[
"Coley",
"A.",
""
],
[
"Pravda",
"V.",
""
],
[
"Pravdova",
"A.",
""
]
] | We develop a dimension-independent theory of alignment in Lorentzian geometry, and apply it to the tensor classification problem for the Weyl and Ricci tensors. First, we show that the alignment condition is equivalent to the PND equation. In 4D, this recovers the usual Petrov types. For higher dimensions, we prove tha... |
gr-qc/0512010 | Wolfgang Kummer | Wolfgang Kummer | Progress and problems in quantum gravity | Talk at 3rd Int.Symposium on "Fundamental Problems in Modern Quantum
Theory and Experiment", Sept. 16-21,2005, Kyiv - Sevastopol (Ukraine) | null | null | TUW-05-15 | gr-qc | null | From the point of view of an uncompromising field theorist quantum gravity is
beset with serious technical and, above all, conceptual problems with regard
especially to the meaning of genuine "physical" observables. This situation is
not really improved by the appearance of recent attempts to reformulate gravity
with... | [
{
"created": "Thu, 1 Dec 2005 12:35:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kummer",
"Wolfgang",
""
]
] | From the point of view of an uncompromising field theorist quantum gravity is beset with serious technical and, above all, conceptual problems with regard especially to the meaning of genuine "physical" observables. This situation is not really improved by the appearance of recent attempts to reformulate gravity within... |
2308.03104 | Mohammad Nouri-Zonoz | H. Sadegh, E. Kiani and M. Nouri-Zonoz | Embedding diagrams in stationary spacetimes | 22 pages, 15 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find the spatial and dynamic embedding diagrams in some stationary
spacetimes. The spatial embeddings include the NUT, pure NUT and Kerr
spacetimes. In the case of pure NUT spacetime, the spatial embedding equations
are solved in terms of the elliptic integrals. In other cases we obtain the
spatial embedding diagr... | [
{
"created": "Sun, 6 Aug 2023 13:05:25 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2024 11:52:02 GMT",
"version": "v2"
}
] | 2024-04-24 | [
[
"Sadegh",
"H.",
""
],
[
"Kiani",
"E.",
""
],
[
"Nouri-Zonoz",
"M.",
""
]
] | We find the spatial and dynamic embedding diagrams in some stationary spacetimes. The spatial embeddings include the NUT, pure NUT and Kerr spacetimes. In the case of pure NUT spacetime, the spatial embedding equations are solved in terms of the elliptic integrals. In other cases we obtain the spatial embedding diagram... |
gr-qc/0504028 | Hideki Maeda | Hideki Maeda | Effects of Gauss-Bonnet term on the final fate of gravitational collapse | 10 pages, 2 figures, final version to appear in Classical and Quantum
Gravity | Class.Quant.Grav. 23 (2006) 2155 | 10.1088/0264-9381/23/6/016 | WU-AP/221/05 | gr-qc hep-th | null | We obtain a general spherically symmetric solution of a null dust fluid in $n
(\geq 4)$-dimensions in Gauss-Bonnet gravity. This solution is a generalization
of the $n$-dimensional Vaidya-(anti)de Sitter solution in general relativity.
For $n=4$, the Gauss-Bonnet term in the action does not contribute to the field
eq... | [
{
"created": "Thu, 7 Apr 2005 04:20:15 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jun 2005 09:25:10 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Oct 2005 16:50:56 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Feb 2006 03:04:43 GMT",
"version": "v4"
}
] | 2009-11-11 | [
[
"Maeda",
"Hideki",
""
]
] | We obtain a general spherically symmetric solution of a null dust fluid in $n (\geq 4)$-dimensions in Gauss-Bonnet gravity. This solution is a generalization of the $n$-dimensional Vaidya-(anti)de Sitter solution in general relativity. For $n=4$, the Gauss-Bonnet term in the action does not contribute to the field equa... |
2210.10587 | Zhan-Feng Mai | Zhan-Feng Mai and Run-Qiu Yang | Using black holes as rechargeable batteries and nuclear reactors | 9 pages, 2 figures; Accepted by PRD | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This paper proposes physical processes to use a Schwarzschild black hole as a
rechargeable battery and nuclear reactor. As a rechargeable battery, it can at
most transform 25\% of input mass into available electric energy in a
controllable and slow way. We study its internal resistance, efficiency of
discharging, max... | [
{
"created": "Wed, 19 Oct 2022 14:28:41 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Oct 2023 06:55:01 GMT",
"version": "v2"
}
] | 2023-10-18 | [
[
"Mai",
"Zhan-Feng",
""
],
[
"Yang",
"Run-Qiu",
""
]
] | This paper proposes physical processes to use a Schwarzschild black hole as a rechargeable battery and nuclear reactor. As a rechargeable battery, it can at most transform 25\% of input mass into available electric energy in a controllable and slow way. We study its internal resistance, efficiency of discharging, maxim... |
2109.04229 | Zi-Liang Wang | Z.L. Wang | Regularized big bang singularity: Geodesic congruences | 16 pages, 1 figure, published version | Physical Review D 104, 084093 (2021) | 10.1103/PhysRevD.104.084093 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate a particular regularization of big bang singularity, which
remains within the domain of 4-dimensional general relativity but allowing for
degenerate metrics. We study the geodesics and geodesic congruences in the
modified Friedmann-Lema\^itre-Robertson-Walker universe. In particular, we
calculate the e... | [
{
"created": "Thu, 9 Sep 2021 12:46:06 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Oct 2021 02:11:07 GMT",
"version": "v2"
}
] | 2021-10-29 | [
[
"Wang",
"Z. L.",
""
]
] | We investigate a particular regularization of big bang singularity, which remains within the domain of 4-dimensional general relativity but allowing for degenerate metrics. We study the geodesics and geodesic congruences in the modified Friedmann-Lema\^itre-Robertson-Walker universe. In particular, we calculate the exp... |
gr-qc/0305020 | Adilson Enio Motter | Adilson E. Motter | Relativistic chaos is coordinate invariant | 4 pages, Revtex | Phys.Rev.Lett. 91 (2003) 231101 | 10.1103/PhysRevLett.91.231101 | null | gr-qc astro-ph | null | The noninvariance of Lyapunov exponents in general relativity has led to the
conclusion that chaos depends on the choice of the space-time coordinates.
Strikingly, we uncover the transformation laws of Lyapunov exponents under
general space-time transformations and we find that chaos, as characterized by
positive Lya... | [
{
"created": "Mon, 5 May 2003 05:51:52 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Dec 2003 23:48:31 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Motter",
"Adilson E.",
""
]
] | The noninvariance of Lyapunov exponents in general relativity has led to the conclusion that chaos depends on the choice of the space-time coordinates. Strikingly, we uncover the transformation laws of Lyapunov exponents under general space-time transformations and we find that chaos, as characterized by positive Lyapu... |
2006.01349 | Michael Good | Michael R.R. Good, Joshua Foo, Eric V. Linder | Accelerating boundary analog of a Kerr black hole | 7 pages, 6 figures | Class. Quantum Grav. 38 085011 (2021) | 10.1088/1361-6382/abebb6 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An accelerated boundary correspondence (i.e. a flat spacetime accelerating
mirror trajectory) is derived for the Kerr spacetime, with a general formula
that ranges from the Schwarzschild limit (zero angular momentum) to the extreme
maximal spin case (yielding asymptotic uniform acceleration). The beta
Bogoliubov coef... | [
{
"created": "Tue, 2 Jun 2020 02:25:42 GMT",
"version": "v1"
}
] | 2021-03-23 | [
[
"Good",
"Michael R. R.",
""
],
[
"Foo",
"Joshua",
""
],
[
"Linder",
"Eric V.",
""
]
] | An accelerated boundary correspondence (i.e. a flat spacetime accelerating mirror trajectory) is derived for the Kerr spacetime, with a general formula that ranges from the Schwarzschild limit (zero angular momentum) to the extreme maximal spin case (yielding asymptotic uniform acceleration). The beta Bogoliubov coeffi... |
gr-qc/0702111 | Jan Ger\v{s}l | Jan Gersl | The Bousso entropy bound in selfgravitating gas of massless particles | 14 pages, 4 figures, a paragraph added, version published in Gen.
Rel. Grav | Gen.Rel.Grav.40:775-789,2008 | 10.1007/s10714-007-0529-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bousso entropy bound is investigated in a static spherically symmetric
spacetime filled with an ideal gas of massless bosons or fermions. Especially
lightsheets generated by spheres are considered. Statistical description of the
gas is given. Conditions under which the Bousso bound can be violated are
discussed a... | [
{
"created": "Tue, 20 Feb 2007 18:53:35 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jul 2008 11:21:54 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gersl",
"Jan",
""
]
] | The Bousso entropy bound is investigated in a static spherically symmetric spacetime filled with an ideal gas of massless bosons or fermions. Especially lightsheets generated by spheres are considered. Statistical description of the gas is given. Conditions under which the Bousso bound can be violated are discussed and... |
gr-qc/9403006 | Robin W. Tucker | M Onder, R W Tucker | On the Relation between Classical and Quantum Cosmology in a
2-Dimensional Dilaton-Gravity Model | 11p, Lanc-Th-G9402 | Class.Quant.Grav.11:1243-1254,1994 | 10.1088/0264-9381/11/5/011 | null | gr-qc hep-th | null | We analyse the classical and quantum theory of a scalar field interacting
with gravitation in two dimensions. We describe a class of analytic solutions
to the Wheeler-DeWitt equation from which we are able to synthesise states that
give prominence to a set of classical cosmologies. These states relate in a
remarkable... | [
{
"created": "Wed, 2 Mar 1994 09:42:17 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Onder",
"M",
""
],
[
"Tucker",
"R W",
""
]
] | We analyse the classical and quantum theory of a scalar field interacting with gravitation in two dimensions. We describe a class of analytic solutions to the Wheeler-DeWitt equation from which we are able to synthesise states that give prominence to a set of classical cosmologies. These states relate in a remarkable w... |
1611.00713 | Kimet Jusufi | Kimet Jusufi | Quantum Effects on the Deflection of Light and the Gauss-Bonnet Theorem | Accepted for publication in International Journal of Geometric
Methods in Modern Physics | Int. J. Geom. Methods Mod. Phys. 14, 1750137 (2017) | 10.1142/S0219887817501377 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter we apply the Gauss--Bonnet theorem (GB) to calculate the
deflection angle by a quantum corrected Schwarzschild black hole in the weak
limit approximation. In particular we calculate the light deflection by two
types of quantum corrected black holes: the renormalization group improved
Schwarzschild solu... | [
{
"created": "Wed, 2 Nov 2016 18:25:51 GMT",
"version": "v1"
},
{
"created": "Sat, 13 May 2017 11:38:32 GMT",
"version": "v2"
}
] | 2017-06-09 | [
[
"Jusufi",
"Kimet",
""
]
] | In this letter we apply the Gauss--Bonnet theorem (GB) to calculate the deflection angle by a quantum corrected Schwarzschild black hole in the weak limit approximation. In particular we calculate the light deflection by two types of quantum corrected black holes: the renormalization group improved Schwarzschild soluti... |
1402.2893 | Mohammad Reza Tanhayi | M. Reza Tanhayi | Quasi-normal Modes in de Sitter Space: Plane Wave Method | 16 pages, typos corrected, references added, published version, To
appear in Phys. Rev. D | Phys. Rev. D 90, 064010 (2014) | 10.1103/PhysRevD.90.064010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, in the context of dS/CFT correspondence, quasinormal modes have
been put forward to address certain features of this conjecture. In particular,
it is argued that the dual states of quasi-normal modes are in fact the states
of CFT$_3$ which are created by operator insertions. For a scalar field in
$dS_4$, qu... | [
{
"created": "Wed, 12 Feb 2014 16:51:14 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Feb 2014 10:16:50 GMT",
"version": "v2"
},
{
"created": "Fri, 23 May 2014 13:56:50 GMT",
"version": "v3"
},
{
"created": "Sun, 31 Aug 2014 18:36:56 GMT",
"version": "v4"
}
] | 2014-09-10 | [
[
"Tanhayi",
"M. Reza",
""
]
] | Recently, in the context of dS/CFT correspondence, quasinormal modes have been put forward to address certain features of this conjecture. In particular, it is argued that the dual states of quasi-normal modes are in fact the states of CFT$_3$ which are created by operator insertions. For a scalar field in $dS_4$, quas... |
2405.09480 | Luis Herrera | L. Herrera, A. Di Prisco, J. Ospino | Ghost stars in general relativity | 19 pages Latex. Invited contribution published in Symmetry (SI: The
Nuclear Physics of Neutron Stars) | Symmetry 16, 562, (2024) | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We explore an idea put forward many years ago by Zeldovich and Novikov
concerning the existence of compact objects endowed with arbitrarily small
mass. The energy-density of such objects, which we call ``Ghost stars'', is
negative in some regions of the fluid distribution, producing a vanishing total
mass. Thus, the ... | [
{
"created": "Wed, 15 May 2024 16:20:54 GMT",
"version": "v1"
}
] | 2024-05-16 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Ospino",
"J.",
""
]
] | We explore an idea put forward many years ago by Zeldovich and Novikov concerning the existence of compact objects endowed with arbitrarily small mass. The energy-density of such objects, which we call ``Ghost stars'', is negative in some regions of the fluid distribution, producing a vanishing total mass. Thus, the in... |
gr-qc/0503124 | P. Ajith | P. Ajith, Bala R. Iyer, C. A. K. Robinson and B. S. Sathyaprakash | Complete adiabatic waveform templates for a test-mass in the
Schwarzschild spacetime: VIRGO and Advanced LIGO studies | Proceedings of the GWDAW-9, Accepted for publication in Class. Quant.
Grav | Class.Quant.Grav.22:S1179-S1188,2005 | 10.1088/0264-9381/22/18/S32 | null | gr-qc | null | Post-Newtonian expansions of the binding energy and gravitational wave flux
truncated at the {\it same relative} post-Newtonian order form the basis of the
{\it standard adiabatic} approximation to the phasing of gravitational waves
from inspiralling compact binaries. Viewed in terms of the dynamics of the
binary, th... | [
{
"created": "Thu, 31 Mar 2005 18:31:48 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Apr 2005 15:21:31 GMT",
"version": "v2"
},
{
"created": "Tue, 24 May 2005 14:51:36 GMT",
"version": "v3"
},
{
"created": "Fri, 10 Jun 2005 10:06:32 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Ajith",
"P.",
""
],
[
"Iyer",
"Bala R.",
""
],
[
"Robinson",
"C. A. K.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | Post-Newtonian expansions of the binding energy and gravitational wave flux truncated at the {\it same relative} post-Newtonian order form the basis of the {\it standard adiabatic} approximation to the phasing of gravitational waves from inspiralling compact binaries. Viewed in terms of the dynamics of the binary, the ... |
1410.4148 | N. E. J. Bjerrum-Bohr | N.E.J. Bjerrum-Bohr, Barry R. Holstein, Ludovic Plant\'e, Pierre
Vanhove | Graviton-Photon Scattering | LaTeX, 33 pages, 5 figures; v2 typos corrected, version to be
published in PRD | null | 10.1103/PhysRevD.91.064008 | IPhT/t14/148, IHES/P/14/32 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the feature that the gravitational Compton scattering amplitude
factorizes in terms of Abelian QED amplitudes to evaluate various gravitational
Compton processes. We examine both the QED and gravitational Compton scattering
from a massive spin-1 system by the use of helicity amplitude methods. In the
case of g... | [
{
"created": "Wed, 15 Oct 2014 17:57:28 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Feb 2015 19:28:44 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"Bjerrum-Bohr",
"N. E. J.",
""
],
[
"Holstein",
"Barry R.",
""
],
[
"Planté",
"Ludovic",
""
],
[
"Vanhove",
"Pierre",
""
]
] | We use the feature that the gravitational Compton scattering amplitude factorizes in terms of Abelian QED amplitudes to evaluate various gravitational Compton processes. We examine both the QED and gravitational Compton scattering from a massive spin-1 system by the use of helicity amplitude methods. In the case of gra... |
gr-qc/0004040 | null | S. Q. Wu and X. Cai | Generalized Laws of Black Hole Thermodynamics and Quantum Conservation
Laws on Hawking Radiation Process | Latex, 8 pages, no figure | Nuovo Cim. B115 (2000) 143-150 | null | null | gr-qc | null | Four classical laws of black hole thermodynamics are extended from exterior
(event) horizon to interior (Cauchy) horizon. Especially, the first law of
classical thermodynamics for Kerr-Newman black hole (KNBH) is generalized to
those in quantum form. Then five quantum conservation laws on the KNBH
evaporation effect ... | [
{
"created": "Thu, 13 Apr 2000 01:02:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wu",
"S. Q.",
""
],
[
"Cai",
"X.",
""
]
] | Four classical laws of black hole thermodynamics are extended from exterior (event) horizon to interior (Cauchy) horizon. Especially, the first law of classical thermodynamics for Kerr-Newman black hole (KNBH) is generalized to those in quantum form. Then five quantum conservation laws on the KNBH evaporation effect ar... |
2103.06455 | Masato Nozawa | Masato Nozawa | An alternative to the Simon tensor | v2: 17 pages, accepted version in CQG | Class. Quantum Grav. 38 155001 (2021) | 10.1088/1361-6382/ac0a87 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Simon tensor gives rise to a local characterization of the Kerr-NUT
family in the stationary class of vacuum spacetimes. We find that a symmetric
and traceless tensor in the quotient space of the stationary Killing trajectory
offers a useful alternative to the Simon tensor. Our tensor is distinct from
the spatial... | [
{
"created": "Thu, 11 Mar 2021 04:40:52 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2021 01:46:26 GMT",
"version": "v2"
}
] | 2021-07-06 | [
[
"Nozawa",
"Masato",
""
]
] | The Simon tensor gives rise to a local characterization of the Kerr-NUT family in the stationary class of vacuum spacetimes. We find that a symmetric and traceless tensor in the quotient space of the stationary Killing trajectory offers a useful alternative to the Simon tensor. Our tensor is distinct from the spatial d... |
1806.02669 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Ruslan Brilenkov, Maxim Eingorn, Valerii Shulga,
Alexander Zhuk | Scalar perturbations in cosmological $f(R)$ models: the cosmic screening
approach | 7 pages, no figures and tables; matches the version published in EPJC | Eur. Phys. J. C 78 (2018) 609 | 10.1140/epjc/s10052-018-6091-7 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate cosmological perturbations for nonlinear $f(R)$ models within
the cosmic screening approach. Matter is considered both in the form of a set
of discrete point-like massive bodies and in the form of a continuous
pressureless perfect fluid. We perform full relativistic analysis of the
first-order theory o... | [
{
"created": "Thu, 7 Jun 2018 13:27:29 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2018 09:26:31 GMT",
"version": "v2"
}
] | 2018-08-07 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Brilenkov",
"Ruslan",
""
],
[
"Eingorn",
"Maxim",
""
],
[
"Shulga",
"Valerii",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We investigate cosmological perturbations for nonlinear $f(R)$ models within the cosmic screening approach. Matter is considered both in the form of a set of discrete point-like massive bodies and in the form of a continuous pressureless perfect fluid. We perform full relativistic analysis of the first-order theory of ... |
1811.10170 | Shahab Shahidi | Shahab Shahidi | Cosmology of a higher derivative scalar theory with non-minimal Maxwell
coupling | 16 pages | EPJC 79 (2019) 448 | 10.1140/epjc/s10052-019-6960-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Higher derivative scalar field theory in curved space-time belongs to the
GLPV theory coupled non-minimally to the Maxwell field is considered. We will
show that the theory admits two independent exact de Sitter solutions in the
FRW background, one driven by the cosmological constant and the other by the
GLPV scalar ... | [
{
"created": "Mon, 26 Nov 2018 04:02:07 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Nov 2018 01:28:21 GMT",
"version": "v2"
},
{
"created": "Sun, 30 Jun 2019 19:22:13 GMT",
"version": "v3"
}
] | 2019-07-02 | [
[
"Shahidi",
"Shahab",
""
]
] | Higher derivative scalar field theory in curved space-time belongs to the GLPV theory coupled non-minimally to the Maxwell field is considered. We will show that the theory admits two independent exact de Sitter solutions in the FRW background, one driven by the cosmological constant and the other by the GLPV scalar fi... |
1412.7570 | Jose Navarro-Salas | Adrian del Rio, Jose Navarro-Salas | Equivalence of Adiabatic and DeWitt-Schwinger renormalization schemes | Misprints corrected, small change in title | Phys. Rev. D91, 064031 (2015) | 10.1103/PhysRevD.91.064031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that adiabatic regularization and DeWitt-Schwinger point-splitting
provide the same result for the renormalized expectation values of the
stress-energy tensor for spin-$1/2$ fields. This generalizes the equivalence
found for scalar fields, which is here recovered in a different way. We also
argue that the co... | [
{
"created": "Tue, 23 Dec 2014 22:31:53 GMT",
"version": "v1"
},
{
"created": "Fri, 29 May 2015 04:50:39 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"del Rio",
"Adrian",
""
],
[
"Navarro-Salas",
"Jose",
""
]
] | We prove that adiabatic regularization and DeWitt-Schwinger point-splitting provide the same result for the renormalized expectation values of the stress-energy tensor for spin-$1/2$ fields. This generalizes the equivalence found for scalar fields, which is here recovered in a different way. We also argue that the coin... |
1202.5800 | Katie Leonard | Katie E. Leonard and R. P. Woodard | Graviton Corrections to Maxwell's Equations | 34 pages, 4 figures, 2 tables, uses LaTeX2e | Phys.Rev.D85:104048,2012 | 10.1103/PhysRevD.85.104048 | UFIFT-QG-12-02 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use dimensional regularization to compute the one loop quantum
gravitational contribution to the vacuum polarization on flat space background.
Adding the appropriate BPHZ counterterm gives a fully renormalized result which
we employ to quantum correct Maxwell's equations. These equations are solved to
show that dy... | [
{
"created": "Sun, 26 Feb 2012 22:54:13 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jun 2012 18:49:50 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Leonard",
"Katie E.",
""
],
[
"Woodard",
"R. P.",
""
]
] | We use dimensional regularization to compute the one loop quantum gravitational contribution to the vacuum polarization on flat space background. Adding the appropriate BPHZ counterterm gives a fully renormalized result which we employ to quantum correct Maxwell's equations. These equations are solved to show that dyna... |
1512.08997 | Jakub Mielczarek Ph.D. | Jakub Mielczarek | Phenomenology of Causal Dynamical Triangulations | Presented at the 14th Marcel Grossman Meeting, Rome, July 12-18, 2015 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The four dimensional Causal Dynamical Triangulations (CDT) approach to
quantum gravity is already more than ten years old theory with numerous
unprecedented predictions such as non-trivial phase structure of gravitational
field and dimensional running. Here, we discuss possible empirical consequences
of CDT derived b... | [
{
"created": "Wed, 30 Dec 2015 16:29:31 GMT",
"version": "v1"
}
] | 2015-12-31 | [
[
"Mielczarek",
"Jakub",
""
]
] | The four dimensional Causal Dynamical Triangulations (CDT) approach to quantum gravity is already more than ten years old theory with numerous unprecedented predictions such as non-trivial phase structure of gravitational field and dimensional running. Here, we discuss possible empirical consequences of CDT derived bas... |
1503.01391 | Sergio Ulhoa | S.C. Ulhoa, A.F. Santos and R.G.G. Amorim | On Non-Commutative Correction of the G\"odel-type Metric | null | General Relativity and Gravitation, 47:99, 2015 | 10.1007/s10714-015-1944-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will study non-commutative corrections in the metric tensor
for the G\"{o}del-type universe, a model that has as its main characteristic
the possibility of violation of causality, allowing therefore time travel. We
also find that the critical radius in such a model, which eventually will
determine t... | [
{
"created": "Wed, 4 Mar 2015 17:15:00 GMT",
"version": "v1"
}
] | 2016-03-30 | [
[
"Ulhoa",
"S. C.",
""
],
[
"Santos",
"A. F.",
""
],
[
"Amorim",
"R. G. G.",
""
]
] | In this paper, we will study non-commutative corrections in the metric tensor for the G\"{o}del-type universe, a model that has as its main characteristic the possibility of violation of causality, allowing therefore time travel. We also find that the critical radius in such a model, which eventually will determine the... |
1106.1533 | Nikolaos Tetradis | N. Lamprou, S. Nonis and N. Tetradis | The BTZ black hole with a time-dependent boundary | 14 pages, 13 figures, title changed in journal, conformal diagrams
added, references added, final version to appear in Classical and Quantum
Gravity | null | 10.1088/0264-9381/29/2/025002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The non-rotating BTZ solution is expressed in terms of coordinates that allow
for an arbitrary time-dependent scale factor in the boundary metric. We provide
explicit expressions for the coordinate transformation that generates this form
of the metric, and determine the regions of the complete Penrose diagram that
ar... | [
{
"created": "Wed, 8 Jun 2011 10:38:34 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jul 2011 08:48:08 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Jul 2011 13:34:54 GMT",
"version": "v3"
},
{
"created": "Sat, 26 Nov 2011 21:10:39 GMT",
"version": "v4"
}
] | 2015-05-28 | [
[
"Lamprou",
"N.",
""
],
[
"Nonis",
"S.",
""
],
[
"Tetradis",
"N.",
""
]
] | The non-rotating BTZ solution is expressed in terms of coordinates that allow for an arbitrary time-dependent scale factor in the boundary metric. We provide explicit expressions for the coordinate transformation that generates this form of the metric, and determine the regions of the complete Penrose diagram that are ... |
gr-qc/0204027 | Daniel Sudarsky | Daniel Sudarsky, Luis Urrutia, and Hector Vucetich | New Observational Bounds to Quantum Gravity Signals | Latex, to be published in PRL | Phys.Rev.Lett. 89 (2002) 231301 | 10.1103/PhysRevLett.89.231301 | null | gr-qc hep-ph hep-th | null | We consider a new set of effects arising from the quantum gravity corrections
to the propagation of fields, associated with fluctuations of the spacetime
geometry. Using already existing experimental data, we can put bounds on these
effects that are more stringent by several orders of magnitude than those
expected to... | [
{
"created": "Fri, 5 Apr 2002 17:42:48 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Sep 2002 14:22:08 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Sudarsky",
"Daniel",
""
],
[
"Urrutia",
"Luis",
""
],
[
"Vucetich",
"Hector",
""
]
] | We consider a new set of effects arising from the quantum gravity corrections to the propagation of fields, associated with fluctuations of the spacetime geometry. Using already existing experimental data, we can put bounds on these effects that are more stringent by several orders of magnitude than those expected to b... |
1811.09493 | Alexander Kamenshchik | Alexander Yu. Kamenshchik and Tereza Vardanyan | Exact solutions of the Einstein equations for an infinite slab with a
constant energy density | Final version, published in Physics Letters B | Physics Letters B 792 (2019 430-435 | 10.1016/j.physletb.2019.02.050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find exact static solutions of the Einstein equations in the spacetime
with plane symmetry, where an infinite slab with finite thickness and
homogeneous energy (mass) density is present. In the first solution the
pressure is isotropic, while in the second solution the tangential components
of the pressure are equa... | [
{
"created": "Fri, 23 Nov 2018 14:27:07 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Apr 2019 10:00:54 GMT",
"version": "v2"
}
] | 2019-04-15 | [
[
"Kamenshchik",
"Alexander Yu.",
""
],
[
"Vardanyan",
"Tereza",
""
]
] | We find exact static solutions of the Einstein equations in the spacetime with plane symmetry, where an infinite slab with finite thickness and homogeneous energy (mass) density is present. In the first solution the pressure is isotropic, while in the second solution the tangential components of the pressure are equal ... |
2009.02972 | Yan-Gang Miao | Yan-Gang Miao, Hao Yang | Internal structure and its connection with thermodynamics and dynamics
in black holes | v1: 17 pages, 9 figures; v2: 20 pages, clarifications and references
added; v3: title changed, clarifications and references added; v4: 19 pages,
clarifications added; v5: 28 pages, 11 figures, clarifications and references
added, final version to appear in Nuclear Physics B | Nucl. Phys. B 984 (2022) 115960 | 10.1016/j.nuclphysb.2022.115960 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general, a finite metric function at the center of a black hole describes
a non-singular spacetime but an infinite metric at the center gives a singular
spacetime, where the former is associated with convergent Ricci and Kretschmann
scalars together with complete radial geodesics, while the latter is related to
di... | [
{
"created": "Mon, 7 Sep 2020 09:31:54 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Oct 2020 14:45:14 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Feb 2021 03:32:24 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Apr 2021 07:15:45 GMT",
"version": "v4"
},
{
"cre... | 2022-09-19 | [
[
"Miao",
"Yan-Gang",
""
],
[
"Yang",
"Hao",
""
]
] | In general, a finite metric function at the center of a black hole describes a non-singular spacetime but an infinite metric at the center gives a singular spacetime, where the former is associated with convergent Ricci and Kretschmann scalars together with complete radial geodesics, while the latter is related to dive... |
2106.02481 | Martin Bojowald | Martin Bojowald | Cosmic tangle: Loop quantum cosmology and CMB anomalies | 14 pages, contribution to special issue on "Quantum Cosmology" in
Universe | Universe 7 (2021) 186 | 10.3390/universe7060186 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop quantum cosmology is a conflicted field in which exuberant claims of
observability coexist with serious objections against the conceptual and
physical viability of its current formulations. This contribution presents a
non-technical case study of the recent claim that loop quantum cosmology might
alleviate anoma... | [
{
"created": "Fri, 4 Jun 2021 13:40:31 GMT",
"version": "v1"
}
] | 2021-06-28 | [
[
"Bojowald",
"Martin",
""
]
] | Loop quantum cosmology is a conflicted field in which exuberant claims of observability coexist with serious objections against the conceptual and physical viability of its current formulations. This contribution presents a non-technical case study of the recent claim that loop quantum cosmology might alleviate anomali... |
1906.02414 | Hideki Asada | Toshiaki Ono, Hideki Asada | The effects of finite distance on the gravitational deflection angle of
light | 57 pages, 15 figures, title and text improved, accepted by Universe | Universe, 5(11), 218 (2019) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to clarify effects of the finite distance from a lens object to a
light source and a receiver, the gravitational deflection of light has been
recently reexamined by using the Gauss-Bonnet (GB) theorem in differential
geometry [Ishihara et al. 2016]. The purpose of the present paper is to give a
short review ... | [
{
"created": "Thu, 6 Jun 2019 04:58:04 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Nov 2019 04:35:36 GMT",
"version": "v2"
}
] | 2019-11-07 | [
[
"Ono",
"Toshiaki",
""
],
[
"Asada",
"Hideki",
""
]
] | In order to clarify effects of the finite distance from a lens object to a light source and a receiver, the gravitational deflection of light has been recently reexamined by using the Gauss-Bonnet (GB) theorem in differential geometry [Ishihara et al. 2016]. The purpose of the present paper is to give a short review of... |
1005.3091 | Sarbari Guha | Sarbari Guha, Pinaki Bhattacharya | Models of Gravity in Five-dimensional Warped Product Spactimes | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have considered gravity in a 5-dimensional warped product
space-time with a time-dependent warp factor, time-dependent extra dimension
and a bulk cosmological constant. The braneworld is described by a spatially
flat FRW-type metric. The five-dimensional field equations have been
constructed and sol... | [
{
"created": "Tue, 18 May 2010 02:45:35 GMT",
"version": "v1"
}
] | 2010-05-19 | [
[
"Guha",
"Sarbari",
""
],
[
"Bhattacharya",
"Pinaki",
""
]
] | In this paper, we have considered gravity in a 5-dimensional warped product space-time with a time-dependent warp factor, time-dependent extra dimension and a bulk cosmological constant. The braneworld is described by a spatially flat FRW-type metric. The five-dimensional field equations have been constructed and solve... |
1007.4094 | Paolo Bertozzini | Paolo Bertozzini, Roberto Conti, Wicharn Lewkeeratiyutkul | Modular Theory, Non-Commutative Geometry and Quantum Gravity | Special Issue "Noncommutative Spaces and Fields" | SIGMA 6:067,2010 | 10.3842/SIGMA.2010.067 | null | gr-qc math-ph math.MP math.OA quant-ph | http://creativecommons.org/licenses/by-nc-sa/3.0/ | This paper contains the first written exposition of some ideas (announced in
a previous survey) on an approach to quantum gravity based on Tomita-Takesaki
modular theory and A. Connes non-commutative geometry aiming at the
reconstruction of spectral geometries from an operational formalism of states
and categories of... | [
{
"created": "Fri, 23 Jul 2010 10:17:55 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Aug 2010 05:26:57 GMT",
"version": "v2"
}
] | 2011-03-28 | [
[
"Bertozzini",
"Paolo",
""
],
[
"Conti",
"Roberto",
""
],
[
"Lewkeeratiyutkul",
"Wicharn",
""
]
] | This paper contains the first written exposition of some ideas (announced in a previous survey) on an approach to quantum gravity based on Tomita-Takesaki modular theory and A. Connes non-commutative geometry aiming at the reconstruction of spectral geometries from an operational formalism of states and categories of o... |
1111.0804 | Plyatsko Roman | Roman Plyatsko, Mykola Fenyk | Highly relativistic spinning particle in the Schwarzschild field:
Circular and other orbits | 10 pages, 11 figures | Phys. Rev.D, v.85, 104023 (2012) | 10.1103/PhysRevD.85.104023 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Mathisson-Papapetrou equations in the Schwarzschild background both at
Mathisson-Pirani and Tulczyjew-Dixon supplementary condition are considered.
The region of existence of highly relativistic circular orbits of a spinning
particle in this background and dependence of the particle's orbital velocity
on its spin... | [
{
"created": "Thu, 3 Nov 2011 11:45:57 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jun 2012 14:50:32 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Plyatsko",
"Roman",
""
],
[
"Fenyk",
"Mykola",
""
]
] | The Mathisson-Papapetrou equations in the Schwarzschild background both at Mathisson-Pirani and Tulczyjew-Dixon supplementary condition are considered. The region of existence of highly relativistic circular orbits of a spinning particle in this background and dependence of the particle's orbital velocity on its spin a... |
1905.00718 | Mahouton J. Stephane Houndjo Dr | H. F. Abadji, M. G. Ganiou, M. J. S. Houndjo, J. Tossa | Inflationary scenario driven by type IV singularity in $f(T)$ gravity | 12 pages. arXiv admin note: text overlap with arXiv:1510.04333,
arXiv:1511.07586 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the effects of Type IV singularity through
$f(T)$ gravity description of inflationary universe, where $T$ denotes the
torsion scalar. With the Friedmann equations of the theory, we reconstruct a
$f(T)$ model according to a given Hubble rate susceptible to describe the
inflationary era ne... | [
{
"created": "Sat, 27 Apr 2019 13:46:44 GMT",
"version": "v1"
}
] | 2019-05-03 | [
[
"Abadji",
"H. F.",
""
],
[
"Ganiou",
"M. G.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Tossa",
"J.",
""
]
] | In this paper, we investigate the effects of Type IV singularity through $f(T)$ gravity description of inflationary universe, where $T$ denotes the torsion scalar. With the Friedmann equations of the theory, we reconstruct a $f(T)$ model according to a given Hubble rate susceptible to describe the inflationary era near... |
1706.06304 | Salvador Robles-Perez | Salvador J. Robles-Perez | Restoration of matter-antimatter symmetry in the multiverse | 4 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the multiverse, the universes can be created in entangled pairs with
spacetimes that are both expanding in terms of the time variables experienced
by internal observers in their particle physics experiments. The time variables
of the two universes are related by an antipodal-like symmetry that might
explain why th... | [
{
"created": "Tue, 20 Jun 2017 08:12:00 GMT",
"version": "v1"
}
] | 2017-06-21 | [
[
"Robles-Perez",
"Salvador J.",
""
]
] | In the multiverse, the universes can be created in entangled pairs with spacetimes that are both expanding in terms of the time variables experienced by internal observers in their particle physics experiments. The time variables of the two universes are related by an antipodal-like symmetry that might explain why ther... |
2404.11913 | Hjalte Frellesvig Dr. | Hjalte Frellesvig and Toni Teschke | General Relativity from Intersection Theory | Ten pages, two figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This paper combines the post-Minkowskian expansion of general relativity with
the language of intersection theory. Due to the nature of the soft limit
inherent to the post-Minkowskian expansion, the intersection-based approach is
of enhanced utility in that theory compared to a generic QFT. In the language
of interse... | [
{
"created": "Thu, 18 Apr 2024 05:26:14 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2024 13:19:50 GMT",
"version": "v2"
}
] | 2024-04-24 | [
[
"Frellesvig",
"Hjalte",
""
],
[
"Teschke",
"Toni",
""
]
] | This paper combines the post-Minkowskian expansion of general relativity with the language of intersection theory. Due to the nature of the soft limit inherent to the post-Minkowskian expansion, the intersection-based approach is of enhanced utility in that theory compared to a generic QFT. In the language of intersect... |
1606.04856 | LVC Publications | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C.
Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M.
Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith,
B. Allen, A. All... | Binary Black Hole Mergers in the first Advanced LIGO Observing Run | 36 pages + 4 appendices, 14 figures; updated author list and
references, final journal version, with appended Erratum for figures 7 and 8 | Phys. Rev. X 6, 041015 (2016) | 10.1103/PhysRevX.6.041015 | LIGO-P1600088 | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The first observational run of the Advanced LIGO detectors, from September
12, 2015 to January 19, 2016, saw the first detections of gravitational waves
from binary black hole mergers. In this paper we present full results from a
search for binary black hole merger signals with total masses up to $100
M_\odot$ and de... | [
{
"created": "Wed, 15 Jun 2016 16:44:05 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jun 2016 16:33:01 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Dec 2016 14:22:38 GMT",
"version": "v3"
},
{
"created": "Tue, 23 Oct 2018 14:58:34 GMT",
"version": "v4"
}
] | 2018-10-24 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abernathy",
"M. R.",
""
],
[
"Acernese",
"F... | The first observational run of the Advanced LIGO detectors, from September 12, 2015 to January 19, 2016, saw the first detections of gravitational waves from binary black hole mergers. In this paper we present full results from a search for binary black hole merger signals with total masses up to $100 M_\odot$ and deta... |
2305.08453 | Bahtiyar \"Ozg\"ur Sar{\i}o\u{g}lu | Okan G\"unel and \"Ozg\"ur Sar{\i}o\u{g}lu | Conserved charges of the Kerr black hole revisited | 17 pages, no figures | Eur. Phys. J. C 83, 787 (2023) | 10.1140/epjc/s10052-023-11916-x | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit the Kerr black hole as cast in the Boyer-Lindquist, Kerr-Schild
and Weyl canonical coordinates, and calculate its total mass/energy and total
angular momentum by using linearized gravity along with its background Killing
isometries. We argue that the integration of the relevant gravitational flux
does not ... | [
{
"created": "Mon, 15 May 2023 08:53:24 GMT",
"version": "v1"
}
] | 2023-09-08 | [
[
"Günel",
"Okan",
""
],
[
"Sarıoğlu",
"Özgür",
""
]
] | We revisit the Kerr black hole as cast in the Boyer-Lindquist, Kerr-Schild and Weyl canonical coordinates, and calculate its total mass/energy and total angular momentum by using linearized gravity along with its background Killing isometries. We argue that the integration of the relevant gravitational flux does not de... |
1703.02836 | Adam Pound | Adam Pound | Nonlinear gravitational self-force: second-order equation of motion | 31 pages. Corrected typos. To be published in PRD | Phys. Rev. D 95, 104056 (2017) | 10.1103/PhysRevD.95.104056 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When a small, uncharged, compact object is immersed in an external background
spacetime, at zeroth order in its mass it moves as a test particle in the
background. At linear order, its own gravitational field alters the geometry
around it, and it moves instead as a test particle in a certain effective
metric satisfyi... | [
{
"created": "Wed, 8 Mar 2017 13:51:38 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Mar 2017 17:21:31 GMT",
"version": "v2"
},
{
"created": "Tue, 23 May 2017 22:31:13 GMT",
"version": "v3"
}
] | 2017-06-07 | [
[
"Pound",
"Adam",
""
]
] | When a small, uncharged, compact object is immersed in an external background spacetime, at zeroth order in its mass it moves as a test particle in the background. At linear order, its own gravitational field alters the geometry around it, and it moves instead as a test particle in a certain effective metric satisfying... |
gr-qc/0612178 | P. Marecki | P. Marecki | On quantum effects in the vicinity of would-be horizons | Contribution to the Proceedings of the MG11 | null | null | null | gr-qc | null | We present a method based on the so-called Quantum Energy Inequalities, which
allows to compare, and bound, the expectation values of energy-densities of
ground states of quantum fields in spacetimes possessing isometric regions. The
method supports the conclusion, that the Boulware energy density is universal
both: ... | [
{
"created": "Thu, 28 Dec 2006 07:14:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Marecki",
"P.",
""
]
] | We present a method based on the so-called Quantum Energy Inequalities, which allows to compare, and bound, the expectation values of energy-densities of ground states of quantum fields in spacetimes possessing isometric regions. The method supports the conclusion, that the Boulware energy density is universal both: at... |
1512.09094 | Stefanos Aretakis | Yannis Angelopoulos, Stefanos Aretakis, Dejan Gajic | The trapping effect on degenerate horizons | 38 pages, 4 figures | Ann. Henri Poincare 18 (2017), 1593-1633 | 10.1007/s00023-016-0545-y | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that degenerate horizons exhibit a new trapping effect. Specifically,
we obtain a non-degenerate Morawetz estimate for the wave equation in the
domain of outer communications of extremal Reissner-Nordstrom up to and
including the future event horizon. We show that such an estimate requires 1) a
higher degree ... | [
{
"created": "Wed, 30 Dec 2015 20:15:57 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Mar 2021 13:20:58 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Angelopoulos",
"Yannis",
""
],
[
"Aretakis",
"Stefanos",
""
],
[
"Gajic",
"Dejan",
""
]
] | We show that degenerate horizons exhibit a new trapping effect. Specifically, we obtain a non-degenerate Morawetz estimate for the wave equation in the domain of outer communications of extremal Reissner-Nordstrom up to and including the future event horizon. We show that such an estimate requires 1) a higher degree of... |
2106.10039 | Nicolas Sanchis-Gual | Nicolas Sanchis-Gual, Vicent Quilis, and Jos\'e A. Font | An estimate of the gravitational-wave background from the observed
cosmological distribution of quasars | 7 pages, 4 figures. Accepted for publication in Physical Review D | Phys. Rev. D 104, 024027 (2021) | 10.1103/PhysRevD.104.024027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational-wave background from the observed cosmological
quasar distribution. Using the DR9Q quasar catalogue from the ninth data
release of the Sloan Digital Sky Survey (SDSS), we create a complete,
statistically consistent sample of quasars from $z=0.3$ to $5.4$. Employing the
spectroscopic informa... | [
{
"created": "Fri, 18 Jun 2021 10:23:03 GMT",
"version": "v1"
}
] | 2021-07-21 | [
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Quilis",
"Vicent",
""
],
[
"Font",
"José A.",
""
]
] | We study the gravitational-wave background from the observed cosmological quasar distribution. Using the DR9Q quasar catalogue from the ninth data release of the Sloan Digital Sky Survey (SDSS), we create a complete, statistically consistent sample of quasars from $z=0.3$ to $5.4$. Employing the spectroscopic informati... |
gr-qc/0305047 | M. Raiteri | M. Ferraris, M. Francaviglia, M. Raiteri | Conserved Quantities from the Equations of Motion (with applications to
natural and gauge natural theories of gravitation) | Latex file, 31 pages | Class.Quant.Grav.20:4043-4066,2003 | 10.1088/0264-9381/20/18/312 | null | gr-qc math-ph math.MP | null | We present an alternative field theoretical approach to the definition of
conserved quantities, based directly on the field equations content of a
Lagrangian theory (in the standard framework of the Calculus of Variations in
jet bundles). The contraction of the Euler-Lagrange equations with Lie
derivatives of the dyn... | [
{
"created": "Tue, 13 May 2003 10:05:02 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Ferraris",
"M.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Raiteri",
"M.",
""
]
] | We present an alternative field theoretical approach to the definition of conserved quantities, based directly on the field equations content of a Lagrangian theory (in the standard framework of the Calculus of Variations in jet bundles). The contraction of the Euler-Lagrange equations with Lie derivatives of the dynam... |
gr-qc/0201036 | Jailson Souza de Alcaniz | Wilson H. C. Freire (URC-Brazil), V. B. Bezerra (UFPB-Brazil), J. A.
S. Lima (UFRN-Brazil) | Cosmological Constant, Conical Defect and Classical Tests of General
Relativity | 9 pages, no figures, revtex | Gen.Rel.Grav. 33 (2001) 1407-1414 | 10.1023/A:1012013809911 | null | gr-qc | null | We investigate the perihelion shift of the planetary motion and the bending
of starlight in the Schwarzschild field modified by the presence of a
$\Lambda$-term plus a conical defect. This analysis generalizes an earlier
result obtained by Islam (Phys. Lett. A 97, 239, 1983) to the case of a pure
cosmological constan... | [
{
"created": "Fri, 11 Jan 2002 03:15:02 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Freire",
"Wilson H. C.",
"",
"URC-Brazil"
],
[
"Bezerra",
"V. B.",
"",
"UFPB-Brazil"
],
[
"Lima",
"J. A. S.",
"",
"UFRN-Brazil"
]
] | We investigate the perihelion shift of the planetary motion and the bending of starlight in the Schwarzschild field modified by the presence of a $\Lambda$-term plus a conical defect. This analysis generalizes an earlier result obtained by Islam (Phys. Lett. A 97, 239, 1983) to the case of a pure cosmological constant.... |
1511.01345 | Kate\v{r}ina Goluchov\'a | Kate\v{r}ina Goluchov\'a, Konrad Kulczycki, Ronaldo S. S. Vieira,
Zden\v{e}k Stuchl\'ik, W{\l}odek Klu\'zniak, Marek Abramowicz | Ho\v{r}ava's quantum gravity illustrated by embedding diagrams of the
Kehagias-Sfetsos spacetimes | The final publication is available at Springer via
http://dx.doi.org/10.1007/s10714-015-1976-3 | null | 10.1007/s10714-015-1976-3 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Possible astrophysical consequences of the Ho\v{r}ava quantum gravity theory
have been recently studied by several authors. They usually employ the
Kehagias-Sfetsos (KS) spacetime which is a spherically symmetric vacuum
solution of a specific version of Ho\v{r}ava's gravity. The KS metric has
several unusual geometri... | [
{
"created": "Mon, 2 Nov 2015 17:28:12 GMT",
"version": "v1"
}
] | 2016-08-06 | [
[
"Goluchová",
"Kateřina",
""
],
[
"Kulczycki",
"Konrad",
""
],
[
"Vieira",
"Ronaldo S. S.",
""
],
[
"Stuchlík",
"Zdeněk",
""
],
[
"Kluźniak",
"Włodek",
""
],
[
"Abramowicz",
"Marek",
""
]
] | Possible astrophysical consequences of the Ho\v{r}ava quantum gravity theory have been recently studied by several authors. They usually employ the Kehagias-Sfetsos (KS) spacetime which is a spherically symmetric vacuum solution of a specific version of Ho\v{r}ava's gravity. The KS metric has several unusual geometrica... |
2003.00227 | Roberto Chan | R. Chan, M. F. A. da Silva and V. H. Satheeshkumar | Spherically Symmetric Analytic Solutions and Naked Singularities in
Einstein-Aether Theory | 21 pages and 9 figures | The European Physical Journal C 81, 317 (2021) | 10.1140/epjc/s10052-021-09120-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we analyze all the possible spherically symmetric
exterior vacuum solutions allowed by the Einstein-Aether theory with static
aether. We show that there are four classes of solutions corresponding to
different values of a combination of the free parameters, $c_{14}=c_1+c_4$,
which are: $ 0 < c_{14... | [
{
"created": "Sat, 29 Feb 2020 10:04:19 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jul 2020 12:54:00 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Jan 2021 19:12:40 GMT",
"version": "v3"
}
] | 2021-04-16 | [
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Satheeshkumar",
"V. H.",
""
]
] | In the present work we analyze all the possible spherically symmetric exterior vacuum solutions allowed by the Einstein-Aether theory with static aether. We show that there are four classes of solutions corresponding to different values of a combination of the free parameters, $c_{14}=c_1+c_4$, which are: $ 0 < c_{14}<... |
1004.1456 | Matt Visser | Gabriel Abreu (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Kodama time: Geometrically preferred foliations of spherically symmetric
spacetimes | V1: 20 pages, no figures; V2: three references added, no physics
changes; V3: title changed, reformatted for Physical Review D, now 10 pages.
Significant revisions. New section on "warped product" decomposition of
spherically symmetric spacetimes. Four references added. This version
accepted for publication in ... | Phys.Rev.D82:044027,2010 | 10.1103/PhysRevD.82.044027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a general time-dependent (3+1)-dimensional spherically symmetric
spacetime, the so-called Kodama vector is a naturally defined geometric
quantity that is timelike outside the evolving horizon and so defines a
preferred class of fiducial observers. However the Kodama vector does not by
itself define any preferred n... | [
{
"created": "Fri, 9 Apr 2010 04:15:51 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Apr 2010 03:26:41 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Jul 2010 00:23:46 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Abreu",
"Gabriel",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | In a general time-dependent (3+1)-dimensional spherically symmetric spacetime, the so-called Kodama vector is a naturally defined geometric quantity that is timelike outside the evolving horizon and so defines a preferred class of fiducial observers. However the Kodama vector does not by itself define any preferred not... |
1912.01420 | Wei-Liang Qian | Yunqi Liu, Wei-Liang Qian, Yungui Gong, and Bin Wang | Gravitational Waves in Scalar-Tensor-Vector Gravity Theory | 14 pages, 0 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the properties of gravitational waves in the
scalar-tensor-vector gravity theory. The polarizations of the gravitational
waves are investigated by analyzing the relative motion of the test particles.
It is found that the interaction between the matter and vector field in the
theory leads to tw... | [
{
"created": "Tue, 3 Dec 2019 14:44:27 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Dec 2019 03:59:40 GMT",
"version": "v2"
}
] | 2019-12-19 | [
[
"Liu",
"Yunqi",
""
],
[
"Qian",
"Wei-Liang",
""
],
[
"Gong",
"Yungui",
""
],
[
"Wang",
"Bin",
""
]
] | In this paper, we study the properties of gravitational waves in the scalar-tensor-vector gravity theory. The polarizations of the gravitational waves are investigated by analyzing the relative motion of the test particles. It is found that the interaction between the matter and vector field in the theory leads to two ... |
1912.03964 | Vladimir Belinski | V. A. Belinski | On the black holes in external electromagnetic fields | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This preprint mainly reflects the new chapter we are prepearing for the
second edition of our book "Gravitational Solitons" (V. Belinski and E.
Verdaguer). However, here it is written in the form of more or less
self-consistent paper dedicated to the mathematical theory of black holes
immersed in the external electro... | [
{
"created": "Mon, 9 Dec 2019 11:07:57 GMT",
"version": "v1"
}
] | 2019-12-10 | [
[
"Belinski",
"V. A.",
""
]
] | This preprint mainly reflects the new chapter we are prepearing for the second edition of our book "Gravitational Solitons" (V. Belinski and E. Verdaguer). However, here it is written in the form of more or less self-consistent paper dedicated to the mathematical theory of black holes immersed in the external electroma... |
2205.13934 | Ashutosh Singh Dr | Ashutosh Singh, Gyan Prakash Singh, Anirudh Pradhan | Cosmic dynamics and qualitative study of Rastall model with spatial
curvature | 14 pages, Typos corrected | Int. J. Mod. Phys. A Vol. 37, No. 16, 2250104 (2022) | 10.1142/S0217751X22501044 | IUCAA Preprint;02/2022 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmic dynamics of Rastall gravity in non-flat
Friedmann-Robertson-Walker (FRW) space-time with barotropic fluid. In this
context, we are concerned about the class of model satisfying the affine
equation of state. We derive the autonomous system for the Rastall model with
barotropic fluid. We apply... | [
{
"created": "Fri, 27 May 2022 12:19:53 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jun 2022 12:35:13 GMT",
"version": "v2"
}
] | 2022-07-27 | [
[
"Singh",
"Ashutosh",
""
],
[
"Singh",
"Gyan Prakash",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | We investigate the cosmic dynamics of Rastall gravity in non-flat Friedmann-Robertson-Walker (FRW) space-time with barotropic fluid. In this context, we are concerned about the class of model satisfying the affine equation of state. We derive the autonomous system for the Rastall model with barotropic fluid. We apply t... |
1805.03099 | Edward Wilson-Ewing | Florian Gerhardt, Daniele Oriti, Edward Wilson-Ewing | The separate universe framework in group field theory condensate
cosmology | 26 pages | Phys. Rev. D 98, 066011 (2018) | 10.1103/PhysRevD.98.066011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the separate universe framework to study cosmological perturbations
within the group field theory formalism for quantum gravity, based on
multi-condensate quantum states. Working with a group field theory action for
gravity minimally coupled to four scalar fields that can act as a set of
relational clock and r... | [
{
"created": "Tue, 8 May 2018 15:17:48 GMT",
"version": "v1"
}
] | 2018-09-26 | [
[
"Gerhardt",
"Florian",
""
],
[
"Oriti",
"Daniele",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | We use the separate universe framework to study cosmological perturbations within the group field theory formalism for quantum gravity, based on multi-condensate quantum states. Working with a group field theory action for gravity minimally coupled to four scalar fields that can act as a set of relational clock and rod... |
2206.05873 | Changjun Gao | Changjun Gao | The metric of general rotating spacetimes | 11 pages | null | null | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the metric for general rotating spacetimes. These spacetimes are
stationary, axially symmetric and spatially asymptotically flat. They can be
the spacetimes outside of rotating black holes or rotating celestial bodies
such as the Sun and the Earth. The metric functions are expanded in power
series of dista... | [
{
"created": "Mon, 13 Jun 2022 01:49:14 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jun 2022 07:06:51 GMT",
"version": "v2"
}
] | 2022-06-22 | [
[
"Gao",
"Changjun",
""
]
] | We propose the metric for general rotating spacetimes. These spacetimes are stationary, axially symmetric and spatially asymptotically flat. They can be the spacetimes outside of rotating black holes or rotating celestial bodies such as the Sun and the Earth. The metric functions are expanded in power series of distanc... |
1603.00782 | Roberto Chan | O. Goldoni, M.F.A. da Silva, R. Chan, V.H. Satheeshkumar and J.F.
Villas da Rocha | A Dynamical Solution in Horava-Lifshitz Gravity in the IR limit | 6 pages. Corrected some typos and added new references. To appear in
Canadian Journal of Physics | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-stationary null dust in a spherically symmetric spacetime is studied in
the context of a general-covariant Horava-Lifshitz theory. The non-minimal
coupling to matter is considered in the infrared limit. The aim of this paper
is to study whether the collapse of a null dust-like fluid can be a solution of
Ho\v{r}av... | [
{
"created": "Wed, 2 Mar 2016 16:37:31 GMT",
"version": "v1"
},
{
"created": "Mon, 2 May 2016 07:04:29 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Nov 2016 12:59:02 GMT",
"version": "v3"
},
{
"created": "Wed, 26 Apr 2017 11:42:48 GMT",
"version": "v4"
},
{
"cre... | 2017-11-27 | [
[
"Goldoni",
"O.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Chan",
"R.",
""
],
[
"Satheeshkumar",
"V. H.",
""
],
[
"da Rocha",
"J. F. Villas",
""
]
] | Non-stationary null dust in a spherically symmetric spacetime is studied in the context of a general-covariant Horava-Lifshitz theory. The non-minimal coupling to matter is considered in the infrared limit. The aim of this paper is to study whether the collapse of a null dust-like fluid can be a solution of Ho\v{r}ava-... |
2401.11799 | Samantha Lopez | S. L\'opez P\'erez and D. Manreza Paret and A. P\'erez Mart\'inez | Magnetized Strange Stars and Signals of Gravitational Waves | null | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We study the emission of gravitational waves from spheroidal magnetized
strange stars for both an isolated slowly rotating star and a binary system. In
the first case, we compute the quadrupole moment and the amplitude of
gravitational waves that may be emitted. For the binary system, the tidal
deformability is obtai... | [
{
"created": "Mon, 22 Jan 2024 09:55:59 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jan 2024 16:47:30 GMT",
"version": "v2"
}
] | 2024-02-01 | [
[
"Pérez",
"S. López",
""
],
[
"Paret",
"D. Manreza",
""
],
[
"Martínez",
"A. Pérez",
""
]
] | We study the emission of gravitational waves from spheroidal magnetized strange stars for both an isolated slowly rotating star and a binary system. In the first case, we compute the quadrupole moment and the amplitude of gravitational waves that may be emitted. For the binary system, the tidal deformability is obtaine... |
1110.3582 | Jacques Pienaar | J. L. Pienaar, C. R. Myers and T. C. Ralph | Quantum fields on closed time-like curves | 12 pages, 10 figures. Minor corrections, added references | Phys. Rev. A 84, 062316 (2011) | 10.1103/PhysRevA.84.062316 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, there has been much interest in the evolution of quantum particles
on closed time-like curves (CTCs). However, such models typically assume
point-like particles with only two degrees of freedom - a very questionable
assumption given the relativistic setting of the problem. We show that it is
possible to gen... | [
{
"created": "Mon, 17 Oct 2011 05:58:46 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2011 07:27:36 GMT",
"version": "v2"
}
] | 2012-09-18 | [
[
"Pienaar",
"J. L.",
""
],
[
"Myers",
"C. R.",
""
],
[
"Ralph",
"T. C.",
""
]
] | Recently, there has been much interest in the evolution of quantum particles on closed time-like curves (CTCs). However, such models typically assume point-like particles with only two degrees of freedom - a very questionable assumption given the relativistic setting of the problem. We show that it is possible to gener... |
2402.14040 | Gholam Hossein Bordbar | J. Sedaghat, B. Eslam Panah, R. Moradi, S. M. Zebarjad and G. H.
Bordbar | Quark stars in massive gravity might be candidates for the mass gap
objects | 26 figures, 7 tables | European Physical Journal C 84 (2024) 171 | 10.1140/epjc/s10052-024-12505-2 | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We have investigated the structural properties of strange quark stars (SQSs)
in a modified theory of gravity known as massive gravity. In order to obtain
the equation of state (EOS) of strange quark matter, we have employed a
modified version of the Nambu-Jona-Lasinio model (MNJL) which includes a
combination of NJL ... | [
{
"created": "Wed, 21 Feb 2024 07:22:25 GMT",
"version": "v1"
}
] | 2024-02-23 | [
[
"Sedaghat",
"J.",
""
],
[
"Panah",
"B. Eslam",
""
],
[
"Moradi",
"R.",
""
],
[
"Zebarjad",
"S. M.",
""
],
[
"Bordbar",
"G. H.",
""
]
] | We have investigated the structural properties of strange quark stars (SQSs) in a modified theory of gravity known as massive gravity. In order to obtain the equation of state (EOS) of strange quark matter, we have employed a modified version of the Nambu-Jona-Lasinio model (MNJL) which includes a combination of NJL La... |
1106.2037 | Jeffrey Yepez | Jeffrey Yepez | Einstein's vierbein field theory of curved space | Public Release 18 Feb 09 Case No. 66ABW-2009-0183 | null | null | USAF Technical Report AFRL-RV-HA-TR-2011-1024 | gr-qc physics.hist-ph | http://creativecommons.org/licenses/publicdomain/ | General Relativity theory is reviewed following the vierbein field theory
approach proposed in 1928 by Einstein. It is based on the vierbein field taken
as the "square root" of the metric tensor field. Einstein's vierbein theory is
a gauge field theory for gravity; the vierbein field playing the role of a
gauge field... | [
{
"created": "Fri, 10 Jun 2011 12:32:54 GMT",
"version": "v1"
}
] | 2011-06-13 | [
[
"Yepez",
"Jeffrey",
""
]
] | General Relativity theory is reviewed following the vierbein field theory approach proposed in 1928 by Einstein. It is based on the vierbein field taken as the "square root" of the metric tensor field. Einstein's vierbein theory is a gauge field theory for gravity; the vierbein field playing the role of a gauge field b... |
gr-qc/9802061 | David Garfinkle | David Garfinkle and G. Comer Duncan | Scaling of curvature in sub-critical gravitational collapse | Revtex, 2 figures, Discussion modified, to appear in Phys. Rev. D | Phys.Rev.D58:064024,1998 | 10.1103/PhysRevD.58.064024 | null | gr-qc | null | We perform numerical simulations of the gravitational collapse of a
spherically symmetric scalar field. For those data that just barely do not form
black holes we find the maximum curvature at the position of the central
observer. We find a scaling relation between this maximum curvature and
distance from the critica... | [
{
"created": "Tue, 24 Feb 1998 23:49:11 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Aug 1998 16:14:07 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Garfinkle",
"David",
""
],
[
"Duncan",
"G. Comer",
""
]
] | We perform numerical simulations of the gravitational collapse of a spherically symmetric scalar field. For those data that just barely do not form black holes we find the maximum curvature at the position of the central observer. We find a scaling relation between this maximum curvature and distance from the critical ... |
gr-qc/0107036 | Atsushi Higuchi | Atsushi Higuchi and Spyros S. Kouris (Univ. of York) | The covariant graviton propagator in de Sitter spacetime | 14 pages, no figure, LaTeX, misprints corrected | Class.Quant.Grav. 18 (2001) 4317-4328 | 10.1088/0264-9381/18/20/311 | null | gr-qc hep-th | null | We consider the covariant graviton propagator in de Sitter spacetime in a
gauge with two parameters, alpha and beta, in the Euclidean approach. We give
an explicit form of the propagator with a particular choice of beta but with
arbitrary value of alpha. We confirm that two-point functions of local
gauge-invariant qu... | [
{
"created": "Tue, 10 Jul 2001 22:00:08 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Sep 2001 14:17:24 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Higuchi",
"Atsushi",
"",
"Univ. of York"
],
[
"Kouris",
"Spyros S.",
"",
"Univ. of York"
]
] | We consider the covariant graviton propagator in de Sitter spacetime in a gauge with two parameters, alpha and beta, in the Euclidean approach. We give an explicit form of the propagator with a particular choice of beta but with arbitrary value of alpha. We confirm that two-point functions of local gauge-invariant quan... |
2305.04768 | Renato Spigler | Renato Spigler | The gravitational two-body potential generated by binary systems | 17 pages, no figures, work in progress | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evaluate the {\em three-dimensional}, {\em non-axis-symmetric}, {\em
time-dependent} Newton potential generated by a pair of mutually orbiting
objects such as pairs of ordinary or neutron stars and, in some approximations,
black holes, spinning around each other. The `vertical component' of the
gravitational force... | [
{
"created": "Mon, 8 May 2023 15:16:39 GMT",
"version": "v1"
}
] | 2023-05-09 | [
[
"Spigler",
"Renato",
""
]
] | We evaluate the {\em three-dimensional}, {\em non-axis-symmetric}, {\em time-dependent} Newton potential generated by a pair of mutually orbiting objects such as pairs of ordinary or neutron stars and, in some approximations, black holes, spinning around each other. The `vertical component' of the gravitational force (... |
0808.2315 | Leor Barack | Leor Barack, Amos Ori, Norichika Sago | Frequency-domain calculation of the self force: the high-frequency
problem and its resolution | 20 pages, 10 eps figures; version published in PRD | Phys.Rev.D78:084021,2008 | 10.1103/PhysRevD.78.084021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mode-sum method provides a practical means for calculating the self force
acting on a small particle orbiting a larger black hole. In this method, one
first computes the spherical-harmonic $l$-mode contributions $F^{\mu}_l$ of the
"full force" field $F^{\mu}$, evaluated at the particle's location, and then
sums o... | [
{
"created": "Sun, 17 Aug 2008 21:43:23 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Oct 2008 17:40:38 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Barack",
"Leor",
""
],
[
"Ori",
"Amos",
""
],
[
"Sago",
"Norichika",
""
]
] | The mode-sum method provides a practical means for calculating the self force acting on a small particle orbiting a larger black hole. In this method, one first computes the spherical-harmonic $l$-mode contributions $F^{\mu}_l$ of the "full force" field $F^{\mu}$, evaluated at the particle's location, and then sums ove... |
gr-qc/0612109 | Xiaoning Wu | Xiaoning Wu and Yu Shang | On Newman-Penrose constants of stationary space-times | 12 pages. accepted by Class. Quant. Grav | Class.Quant.Grav.24:679-690,2007 | 10.1088/0264-9381/24/3/011 | null | gr-qc | null | We consider the general asymptotic expression of stationary space-time. Using
Killing equation, we reduce the dynamical freedom of Einstein equation to the
in-going gravitational wave $\Psi_0$. The general form of this function can be
got. With the help of asymptotically algebraic special condition, we prove that
all... | [
{
"created": "Mon, 18 Dec 2006 13:05:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wu",
"Xiaoning",
""
],
[
"Shang",
"Yu",
""
]
] | We consider the general asymptotic expression of stationary space-time. Using Killing equation, we reduce the dynamical freedom of Einstein equation to the in-going gravitational wave $\Psi_0$. The general form of this function can be got. With the help of asymptotically algebraic special condition, we prove that all N... |
1112.4652 | Qasem Exirifard | Qasem Exirifard | Lunar system constraints on the modified theories of gravity | null | International Journal of Modern Physics D, July 2013, Vol. 22, No.
09 | 10.1142/S0218271813500648 | IPM/P-2011/060 | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The MOND paradigm to the missing mass problem requires introducing a
functional that is to be identified through observations and experiments. We
consider AQUAL theory as a realization of the MOND. We show that the accurate
value of the Earth GM measured by the Lunar Laser Ranging and that by various
artificial Earth... | [
{
"created": "Tue, 20 Dec 2011 11:17:09 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Feb 2013 12:00:23 GMT",
"version": "v2"
},
{
"created": "Fri, 17 May 2013 16:57:15 GMT",
"version": "v3"
}
] | 2013-06-28 | [
[
"Exirifard",
"Qasem",
""
]
] | The MOND paradigm to the missing mass problem requires introducing a functional that is to be identified through observations and experiments. We consider AQUAL theory as a realization of the MOND. We show that the accurate value of the Earth GM measured by the Lunar Laser Ranging and that by various artificial Earth s... |
2308.11215 | Soham Sen | Sukanta Bhattacharyya, Soham Sen, and Sunandan Gangopadhyay | Resonant detectors of gravitational wave in the linear and quadratic
generalized uncertainty principle framework | 19 pages LATEX. Comments are welcome | Eur. Phys. J. C 84 (2024) 425 | 10.1140/epjc/s10052-024-12786-7 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | In this work, we consider a resonant bar detector of gravitational wave in
the generalized uncertainty principle (GUP) framework with linear and quadratic
momentum uncertainties. The phonon modes in these detectors vibrate due to the
interaction with the incoming gravitational wave. In this uncertainty principle
fram... | [
{
"created": "Tue, 22 Aug 2023 06:00:30 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Apr 2024 13:31:20 GMT",
"version": "v2"
}
] | 2024-04-26 | [
[
"Bhattacharyya",
"Sukanta",
""
],
[
"Sen",
"Soham",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | In this work, we consider a resonant bar detector of gravitational wave in the generalized uncertainty principle (GUP) framework with linear and quadratic momentum uncertainties. The phonon modes in these detectors vibrate due to the interaction with the incoming gravitational wave. In this uncertainty principle framew... |
1812.03420 | Keigo Shimada | Keigo Shimada, Katsuki Aoki, and Kei-ichi Maeda | Metric-affine Gravity and Inflation | 18 pages, 6 figures, comments welcome. v2: references added | Phys. Rev. D 99, 104020 (2019) | 10.1103/PhysRevD.99.104020 | WU-AP/1808/18 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We classify the metric-affine theories of gravitation, in which the metric
and the connections are treated as independent variables, by use of several
constraints on the connections. Assuming the Einstein-Hilbert action, we find
that the equations for the distortion tensor (torsion and non-metricity) become
algebraic... | [
{
"created": "Sun, 9 Dec 2018 03:09:51 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Dec 2018 12:22:48 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Shimada",
"Keigo",
""
],
[
"Aoki",
"Katsuki",
""
],
[
"Maeda",
"Kei-ichi",
""
]
] | We classify the metric-affine theories of gravitation, in which the metric and the connections are treated as independent variables, by use of several constraints on the connections. Assuming the Einstein-Hilbert action, we find that the equations for the distortion tensor (torsion and non-metricity) become algebraic, ... |
1212.2159 | S Habib Mazharimousavi | M. Halilsoy, O. Gurtug and S. Habib Mazharimousavi | Modified Rindler acceleration as a nonlinear electromagnetic effect | 10 pages one figure, final version accepted for publication in
Astroparticle Physics | Astroparticle Physics 68, 1 (2015) | 10.1016/j.astropartphys.2015.02.006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The model proposed originally by Mannheim and Kazanas for fitting the shapes
of galactic rotation curves has recently been considered by Grumiller to
describe gravity of a central object at large distances. Herein we employ the
same geometry within the context of nonlinear electrodynamics (NED). Pure
electrical NED m... | [
{
"created": "Mon, 26 Nov 2012 10:08:24 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Feb 2015 07:52:00 GMT",
"version": "v2"
}
] | 2015-03-11 | [
[
"Halilsoy",
"M.",
""
],
[
"Gurtug",
"O.",
""
],
[
"Mazharimousavi",
"S. Habib",
""
]
] | The model proposed originally by Mannheim and Kazanas for fitting the shapes of galactic rotation curves has recently been considered by Grumiller to describe gravity of a central object at large distances. Herein we employ the same geometry within the context of nonlinear electrodynamics (NED). Pure electrical NED mod... |
1802.05129 | Miftachul Hadi | Malcolm Anderson, Miftachul Hadi, Andri Husein | Non-Twisting and Twisting Solutions of the Einstein Field Equations of a
Skyrmionic String | 15 pages, no figure. arXiv admin note: text overlap with
arXiv:1505.05930 and arXiv:1710.01250; substantial text overlap with
arXiv:1802.02459 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct non-linear sigma model plus Skyrme term (Skyrme model) with a
twist in the gravitational field. We try to solve the Einstein field equations
for small and large values of $r$, with and without twist. We prove that no
non-twisting or twisting solutions extending from $r=0$ to $r=\infty$ exist. At
last, we... | [
{
"created": "Tue, 13 Feb 2018 09:46:49 GMT",
"version": "v1"
}
] | 2018-02-15 | [
[
"Anderson",
"Malcolm",
""
],
[
"Hadi",
"Miftachul",
""
],
[
"Husein",
"Andri",
""
]
] | We construct non-linear sigma model plus Skyrme term (Skyrme model) with a twist in the gravitational field. We try to solve the Einstein field equations for small and large values of $r$, with and without twist. We prove that no non-twisting or twisting solutions extending from $r=0$ to $r=\infty$ exist. At last, we t... |
1904.00212 | Yu-Tong Wang | Yu-Tong Wang, Jun Zhang, Shuang-Yong Zhou, Yun-Song Piao | On echo intervals in gravitational wave echo analysis | 7 pages,6 figures and 3 tables | null | 10.1140/epjc/s10052-019-7234-1 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave echoes, if they exist, could encode important information
of new physics from the strong gravity regime. Current echo searches usually
assume constant interval echoes (CIEs) a priori, although unequal interval
echoes (UIEs) are also possible. Despite of its simplicity, the using of CIE
templates ne... | [
{
"created": "Sat, 30 Mar 2019 12:54:16 GMT",
"version": "v1"
}
] | 2019-10-02 | [
[
"Wang",
"Yu-Tong",
""
],
[
"Zhang",
"Jun",
""
],
[
"Zhou",
"Shuang-Yong",
""
],
[
"Piao",
"Yun-Song",
""
]
] | Gravitational wave echoes, if they exist, could encode important information of new physics from the strong gravity regime. Current echo searches usually assume constant interval echoes (CIEs) a priori, although unequal interval echoes (UIEs) are also possible. Despite of its simplicity, the using of CIE templates need... |
0803.4369 | Tiberiu Harko | T. Harko, V. S. Sabau | Jacobi stability of the vacuum in the static spherically symmetric brane
world models | 21 pages, 3 figures, accepted for publication in PRD | Phys.Rev.D77:104009,2008 | 10.1103/PhysRevD.77.104009 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the stability of the structure equations of the vacuum in the
brane world models, by using both the linear (Lyapunov) stability analysis, and
the Jacobi stability analysis, the Kosambi-Cartan-Chern (KCC) theory. In the
brane world models the four dimensional effective Einstein equations acquire
extra terms... | [
{
"created": "Mon, 31 Mar 2008 04:33:35 GMT",
"version": "v1"
},
{
"created": "Sat, 3 May 2008 04:38:48 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Harko",
"T.",
""
],
[
"Sabau",
"V. S.",
""
]
] | We analyze the stability of the structure equations of the vacuum in the brane world models, by using both the linear (Lyapunov) stability analysis, and the Jacobi stability analysis, the Kosambi-Cartan-Chern (KCC) theory. In the brane world models the four dimensional effective Einstein equations acquire extra terms, ... |
2407.20850 | Maur\'icio Richartz | Jo\~ao Paulo Cavalcante, Maur\'icio Richartz, Bruno Carneiro da Cunha | Exceptional point and hysteresis in perturbations of Kerr black holes | v1: 8 pages, 4 figures | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ the isomonodromic method to study linear scalar massive
perturbations of Kerr black holes for generic scalar masses $M\mu$ and generic
black hole spins $a/M$. A degeneracy between the longest-living quasinormal
mode and the first overtone is found for $(M\mu)_c \simeq 0.3704981$ and
$(a/M)_c\simeq 0.9994660... | [
{
"created": "Tue, 30 Jul 2024 14:27:24 GMT",
"version": "v1"
}
] | 2024-07-31 | [
[
"Cavalcante",
"João Paulo",
""
],
[
"Richartz",
"Maurício",
""
],
[
"da Cunha",
"Bruno Carneiro",
""
]
] | We employ the isomonodromic method to study linear scalar massive perturbations of Kerr black holes for generic scalar masses $M\mu$ and generic black hole spins $a/M$. A degeneracy between the longest-living quasinormal mode and the first overtone is found for $(M\mu)_c \simeq 0.3704981$ and $(a/M)_c\simeq 0.9994660$.... |
1610.00356 | Leonid Perlov | Leonid Perlov, Michael Bukatin | Revisiting EPRL: All Finite-Dimensional Solutions by Naimark's
Fundamental Theorem | null | Annales Henri Poincare, September 2017, Volume 18, Issue 9, pp
3035-3048 | 10.1007/s00023-017-0588-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we research all possible finite-dimensional representations and
corresponding values of the Barbero-Immirzi parameter contained in EPRL
simplicity constraints by using Naimark's fundamental theorem of the Lorentz
group representation theory. It turns out that for each non-zero pure imaginary
with ration... | [
{
"created": "Sun, 2 Oct 2016 21:35:36 GMT",
"version": "v1"
},
{
"created": "Wed, 24 May 2017 15:55:46 GMT",
"version": "v2"
},
{
"created": "Thu, 25 May 2017 04:29:36 GMT",
"version": "v3"
},
{
"created": "Sat, 9 Sep 2017 18:26:36 GMT",
"version": "v4"
}
] | 2017-09-12 | [
[
"Perlov",
"Leonid",
""
],
[
"Bukatin",
"Michael",
""
]
] | In this paper we research all possible finite-dimensional representations and corresponding values of the Barbero-Immirzi parameter contained in EPRL simplicity constraints by using Naimark's fundamental theorem of the Lorentz group representation theory. It turns out that for each non-zero pure imaginary with rational... |
1906.08214 | Alexander Zhuk | Ezgi Yal\c{c}{\i}nkaya and Alexander Zhuk | Weak-field limit of Kaluza-Klein model with non-linear perfect fluid | v2 (matching the publication in Gravitation and Cosmology) = v1 +
minor changes; 5 pages, no figures | Gravitation and Cosmology, 2019, Vol. 25, N4, pp. 349-353 | 10.1134/S0202289319040145 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main purpose of our paper is to construct a viable Kaluza-Klein model
satisfying the observable constraints. To this end, we investigate the
six-dimensional model with spherical compactification of the internal space.
Background matter is considered in the form of a perfect fluid with non-linear
equations of stat... | [
{
"created": "Wed, 19 Jun 2019 16:44:59 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2019 19:31:36 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Yalçınkaya",
"Ezgi",
""
],
[
"Zhuk",
"Alexander",
""
]
] | The main purpose of our paper is to construct a viable Kaluza-Klein model satisfying the observable constraints. To this end, we investigate the six-dimensional model with spherical compactification of the internal space. Background matter is considered in the form of a perfect fluid with non-linear equations of state ... |
0811.1452 | Ilia Musco | Ilia Musco, John C. Miller and Alexander G. Polnarev | Primordial black hole formation in the radiative era: investigation of
the critical nature of the collapse | 21 pages, 7 figures, the present version is updated with some changes
and two new appendix. Accepted for pubblication in Classical and Quantum
Gravity | Class.Quant.Grav.26:235001,2009 | 10.1088/0264-9381/26/23/235001 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following on after two previous papers discussing the formation of primordial
black holes in the early universe, we present here results from an in-depth
investigation of the extent to which primordial black hole formation in the
radiative era can be considered as an example of the critical collapse
phenomenon. We fo... | [
{
"created": "Mon, 10 Nov 2008 11:58:10 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Sep 2009 11:16:49 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Musco",
"Ilia",
""
],
[
"Miller",
"John C.",
""
],
[
"Polnarev",
"Alexander G.",
""
]
] | Following on after two previous papers discussing the formation of primordial black holes in the early universe, we present here results from an in-depth investigation of the extent to which primordial black hole formation in the radiative era can be considered as an example of the critical collapse phenomenon. We focu... |
gr-qc/0010102 | Nils Andersson | N. Andersson and K.D. Kokkotas | The r-mode instability in rotating neutron stars | 62 page review article commissioned by Int. J. Mod. Phys. D.
(stylefile included) | Int.J.Mod.Phys.D10:381-442,2001 | 10.1142/S0218271801001062 | null | gr-qc astro-ph | null | In this review we summarize the current understanding of the
gravitational-wave driven instability associated with the so-called r-modes in
rotating neutron stars. We discuss the nature of the r-modes, the detailed
mechanics of the instability and its potential astrophysical significance. In
particular we discuss res... | [
{
"created": "Fri, 27 Oct 2000 09:42:19 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Andersson",
"N.",
""
],
[
"Kokkotas",
"K. D.",
""
]
] | In this review we summarize the current understanding of the gravitational-wave driven instability associated with the so-called r-modes in rotating neutron stars. We discuss the nature of the r-modes, the detailed mechanics of the instability and its potential astrophysical significance. In particular we discuss resul... |
1906.01152 | Milko Estrada | Rodrigo Aros, Milko Estrada | Regular black holes with $\Lambda>0$ and its evolution in Lovelock
gravity | null | Eur. Phys. J. C (2019) 79: 810 | 10.1140/epjc/s10052-019-7316-0 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | In this work it is shown that the thermodynamics of regular black holes with
a cosmological horizon, which are solutions of Lovelock gravity, determines
that they must evolve either into a state where the black hole and cosmological
horizons have reached thermal equilibrium or into an extreme black hole
geometry wher... | [
{
"created": "Tue, 4 Jun 2019 01:36:43 GMT",
"version": "v1"
}
] | 2019-10-03 | [
[
"Aros",
"Rodrigo",
""
],
[
"Estrada",
"Milko",
""
]
] | In this work it is shown that the thermodynamics of regular black holes with a cosmological horizon, which are solutions of Lovelock gravity, determines that they must evolve either into a state where the black hole and cosmological horizons have reached thermal equilibrium or into an extreme black hole geometry where ... |
2403.01401 | Faisal Javed | G. Mustafa, Faisal Javed, S.K. Maurya, M. Govender, Amna Saleem | Dynamical stability of new wormhole solutions via cold dark matter and
solitonic quantum wave halos in $f(\mathcal{R},\mathcal{L}_m)$ gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This current analysis offers novel wormhole solutions in the background of
newly developed extended $f(\mathcal{R},\mathcal{L}_m)$ gravity. We use an
anisotropic matter source and a particular type of energy density demonstrating
cold dark matter halo and quantum wave dark matter halo to calculate two
different wormh... | [
{
"created": "Sun, 3 Mar 2024 05:32:13 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Mustafa",
"G.",
""
],
[
"Javed",
"Faisal",
""
],
[
"Maurya",
"S. K.",
""
],
[
"Govender",
"M.",
""
],
[
"Saleem",
"Amna",
""
]
] | This current analysis offers novel wormhole solutions in the background of newly developed extended $f(\mathcal{R},\mathcal{L}_m)$ gravity. We use an anisotropic matter source and a particular type of energy density demonstrating cold dark matter halo and quantum wave dark matter halo to calculate two different wormhol... |
1907.12077 | Sanjeev S. Seahra | Sanjeev S. Seahra | The initial value problem for gravitational waves in conformal gravity | Exposition added, minor edits. Matches version accepted in CQG. 14+1
pages, 1 figure | null | 10.1088/1361-6382/ab6be1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In certain models of conformal gravity, the propagation of gravitational
waves is governed by a fourth order scalar partial differential equation. We
study the initial value problem for a generalization of this equation, and
derive a Kirchhoff-like explicit solution in terms of the field and its first
three time deri... | [
{
"created": "Sun, 28 Jul 2019 12:15:10 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jan 2020 12:51:03 GMT",
"version": "v2"
}
] | 2020-04-08 | [
[
"Seahra",
"Sanjeev S.",
""
]
] | In certain models of conformal gravity, the propagation of gravitational waves is governed by a fourth order scalar partial differential equation. We study the initial value problem for a generalization of this equation, and derive a Kirchhoff-like explicit solution in terms of the field and its first three time deriva... |
0807.4867 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Can B. Kilinc | LRS Bianchi Type I Models with Anisotropic Dark Energy and Constant
Deceleration Parameter | 20 pages, 10 figures. The revised, final version accepted for
publication in General Relativity and Gravitation | Gen.Rel.Grav.42:119-140,2010 | 10.1007/s10714-009-0821-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Locally rotationally symmetric (LRS) Bianchi Type I cosmological models are
examined in the presence of dynamically anisotropic dark energy and perfect
fluid. We assume that the dark energy (DE) is minimally interacting, has
dynamical energy density, anisotropic equation of state parameter (EoS). The
conservation of ... | [
{
"created": "Wed, 30 Jul 2008 13:58:28 GMT",
"version": "v1"
},
{
"created": "Fri, 1 May 2009 19:13:59 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Kilinc",
"Can B.",
""
]
] | Locally rotationally symmetric (LRS) Bianchi Type I cosmological models are examined in the presence of dynamically anisotropic dark energy and perfect fluid. We assume that the dark energy (DE) is minimally interacting, has dynamical energy density, anisotropic equation of state parameter (EoS). The conservation of th... |
2010.09051 | Juan Ram\'on Mu\~noz de Nova | J. R. M. de Nova, P. F. Palacios, I. Carusotto and F. Sols | Long time universality of black-hole lasers | 14 pages, 8 figures. Final version of the manuscript | New J. Phys. 23, 023040 (2021) | 10.1088/1367-2630/abdce2 | null | gr-qc cond-mat.quant-gas nlin.PS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For flowing quantum gases, it has been found that at long times an initial
black-hole laser (BHL) configuration exhibits only two possible states: the
ground state or a periodic self-oscillating state of continuous emission of
solitons. So far, all the works on this subject are based on a highly idealized
model, quit... | [
{
"created": "Sun, 18 Oct 2020 18:02:27 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Mar 2021 19:01:53 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"de Nova",
"J. R. M.",
""
],
[
"Palacios",
"P. F.",
""
],
[
"Carusotto",
"I.",
""
],
[
"Sols",
"F.",
""
]
] | For flowing quantum gases, it has been found that at long times an initial black-hole laser (BHL) configuration exhibits only two possible states: the ground state or a periodic self-oscillating state of continuous emission of solitons. So far, all the works on this subject are based on a highly idealized model, quite ... |
1605.08955 | Kentaro Tomoda | Arata Aoki, Tsuyoshi Houri and Kentaro Tomoda | Rational first integrals of geodesic equations and generalised hidden
symmetries | 12 pages; v2: minor modifications; v3: further improvements, refs
added, matches published version in CQG | null | 10.1088/0264-9381/33/19/195003 | KOBE-COSMO-16-05 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss novel generalisations of Killing tensors, which are introduced by
considering rational first integrals of geodesic equations. We introduce the
notion of inconstructible generalised Killing tensors, which cannot be
constructed from ordinary Killing tensors. Moreover, we introduce
inconstructible rational fi... | [
{
"created": "Sun, 29 May 2016 01:41:22 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2016 01:31:57 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Sep 2016 02:47:25 GMT",
"version": "v3"
}
] | 2016-09-27 | [
[
"Aoki",
"Arata",
""
],
[
"Houri",
"Tsuyoshi",
""
],
[
"Tomoda",
"Kentaro",
""
]
] | We discuss novel generalisations of Killing tensors, which are introduced by considering rational first integrals of geodesic equations. We introduce the notion of inconstructible generalised Killing tensors, which cannot be constructed from ordinary Killing tensors. Moreover, we introduce inconstructible rational firs... |
gr-qc/9707017 | Carlos O. Lousto | Manuela Campanelli and Carlos O. Lousto (Univ. Utah) | Regularization of the Teukolsky Equation for Rotating Black Holes | 14 pages, 1 Table, REVTEX | Phys.Rev. D56 (1997) 6363-6369 | 10.1103/PhysRevD.56.6363 | null | gr-qc astro-ph hep-th | null | We show that the radial Teukolsky equation (in the frequency domain) with
sources that extend to infinity has well-behaved solutions. To prove that, we
follow Poisson approach to regularize the non-rotating hole, and extend it to
the rotating case. To do so we use the Chandrasekhar transformation among the
Teukolsky ... | [
{
"created": "Tue, 8 Jul 1997 00:40:04 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Campanelli",
"Manuela",
"",
"Univ. Utah"
],
[
"Lousto",
"Carlos O.",
"",
"Univ. Utah"
]
] | We show that the radial Teukolsky equation (in the frequency domain) with sources that extend to infinity has well-behaved solutions. To prove that, we follow Poisson approach to regularize the non-rotating hole, and extend it to the rotating case. To do so we use the Chandrasekhar transformation among the Teukolsky an... |
gr-qc/0503025 | Kirill Bronnikov | K.A. Bronnikov and M.S. Chernakova | f(R) theory of gravity and conformal continuations | Latex, gc style, 8 pages | null | null | null | gr-qc | null | We consider static, spherically symmetric vacuum solutions to the equations
of a theory of gravity with the Lagrangian f(R) where R is the scalar curvature
and f is an arbitrary function. Using a well-known conformal transformation,
the equations of f(R) theory are reduced to the ``Einstein picture'', i.e., to
the eq... | [
{
"created": "Sun, 6 Mar 2005 10:08:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Chernakova",
"M. S.",
""
]
] | We consider static, spherically symmetric vacuum solutions to the equations of a theory of gravity with the Lagrangian f(R) where R is the scalar curvature and f is an arbitrary function. Using a well-known conformal transformation, the equations of f(R) theory are reduced to the ``Einstein picture'', i.e., to the equa... |
2406.08514 | Nosratollah Jafari Sonbolabadi | Nosratollah Jafari | Curvature of \k{appa}-Poincare and Doubly Special Relativity | 17 pages. arXiv admin note: text overlap with arXiv:2404.08553 | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We study the \k{appa}-Poincare and the Magueijo-Smolin (MS) DSR in the
context of the relative locality theory. This theory assigns connection,
torsion and curvature to momentum space of every modified theory beyond special
relativity. We obtain these quantities for the \k{appa}-Poincare and the MS DSR
in all order o... | [
{
"created": "Sun, 9 Jun 2024 18:48:13 GMT",
"version": "v1"
}
] | 2024-06-14 | [
[
"Jafari",
"Nosratollah",
""
]
] | We study the \k{appa}-Poincare and the Magueijo-Smolin (MS) DSR in the context of the relative locality theory. This theory assigns connection, torsion and curvature to momentum space of every modified theory beyond special relativity. We obtain these quantities for the \k{appa}-Poincare and the MS DSR in all order of ... |
2204.10563 | Anshuman Baruah | Anshuman Baruah, Parangam Goswami, Atri Deshamukhya | Non-commutative Wormholes in $f(R)$ Gravity satisfying the Energy
Conditions | 27 pages, 14 figures, 3 tables | New Astronomy (2022) | 10.1016/j.newast.2022.101956 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Traversable wormholes in General Relativity (GR) require exotic matter
sources that violate the null energy condition (NEC), and such behavior may be
avoided in modified gravity. Moreover, the concept of non-commutative geometry
as a gravitational source can be leveraged both in GR and modified gravity to
realize non... | [
{
"created": "Fri, 22 Apr 2022 08:19:22 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Oct 2022 10:52:24 GMT",
"version": "v2"
}
] | 2022-10-18 | [
[
"Baruah",
"Anshuman",
""
],
[
"Goswami",
"Parangam",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | Traversable wormholes in General Relativity (GR) require exotic matter sources that violate the null energy condition (NEC), and such behavior may be avoided in modified gravity. Moreover, the concept of non-commutative geometry as a gravitational source can be leveraged both in GR and modified gravity to realize non-t... |
gr-qc/0512106 | Jan Metzger | Lars Andersson, Jan Metzger | Curvature estimates for stable marginally trapped surfaces | 28 pages. This is a major rework of the previous version. It extends
the curvature estimates to no longer require global area bounds. In addition
some mistakes were corrected | null | null | AEI-2005-198 | gr-qc math.DG | null | We derive integral and sup-estimates for the curvature of stably marginally
outer trapped surfaces in a sliced space-time. The estimates bound the shear of
a marginally outer trapped surface in terms of the intrinsic and extrinsic
curvature of a slice containing the surface. These estimates are well adapted
to situat... | [
{
"created": "Mon, 19 Dec 2005 14:52:37 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Aug 2006 14:05:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Andersson",
"Lars",
""
],
[
"Metzger",
"Jan",
""
]
] | We derive integral and sup-estimates for the curvature of stably marginally outer trapped surfaces in a sliced space-time. The estimates bound the shear of a marginally outer trapped surface in terms of the intrinsic and extrinsic curvature of a slice containing the surface. These estimates are well adapted to situatio... |
gr-qc/0003048 | Gaetano Lambiase | S. Capozziello and G. Lambiase | Double Scalar-Tensor Gravity Cosmologies | LaTex file, 18 pages, no figures, 2 tables, to appear in Grav. & Cosm | Grav.Cosmol. 6 (2000) 164-172 | null | null | gr-qc | null | We investigate homogeneous and isotropic cosmological models in scalar-tensor
theories of gravity where two scalar fields are nonminimally coupled to the
geometry. Exact solutions are found, by Noether symmetries, depending on the
form of couplings and self-interaction potentials. An interesting feature is
that we de... | [
{
"created": "Mon, 13 Mar 2000 14:06:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Capozziello",
"S.",
""
],
[
"Lambiase",
"G.",
""
]
] | We investigate homogeneous and isotropic cosmological models in scalar-tensor theories of gravity where two scalar fields are nonminimally coupled to the geometry. Exact solutions are found, by Noether symmetries, depending on the form of couplings and self-interaction potentials. An interesting feature is that we deal... |
gr-qc/0610042 | Eiji Mitsuda | Eiji Mitsuda and Akira Tomimatsu | Breakdown of self-similar evolution in homogeneous perfect fluid
collapse | 9 pages, 1 figure, references added, published in Physical Review D | Phys.Rev. D74 (2006) 104019 | 10.1103/PhysRevD.74.104019 | DPNU-06-09 | gr-qc | null | The stability analysis of self-similar solutions is an important approach to
confirm whether they act as an attractor in general non-self-similar
gravitational collapse. Assuming that the collapsing matter is a perfect fluid
with the equation of state $P=\alpha\rho$, we study spherically symmetric
non-self-similar pe... | [
{
"created": "Tue, 10 Oct 2006 12:44:24 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Nov 2006 05:57:01 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Mitsuda",
"Eiji",
""
],
[
"Tomimatsu",
"Akira",
""
]
] | The stability analysis of self-similar solutions is an important approach to confirm whether they act as an attractor in general non-self-similar gravitational collapse. Assuming that the collapsing matter is a perfect fluid with the equation of state $P=\alpha\rho$, we study spherically symmetric non-self-similar pert... |
2209.00365 | Sanjit Das | Gowtham Sidharth M, Sanjit Das | Effect of quintessence on the Nature of Kerr-newman blackhole shadow
with clouds of strings | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we have took reissner nordstrom blackhole with cloud of strings
and surrounds it with quintessence. we processed the metric through newman
janis algorithm to get its rotating counterpart. the blackhole in study now is
a roating charged blackhole with clouds of string surrounded by quintessence.
we studi... | [
{
"created": "Thu, 1 Sep 2022 11:19:58 GMT",
"version": "v1"
}
] | 2022-09-02 | [
[
"M",
"Gowtham Sidharth",
""
],
[
"Das",
"Sanjit",
""
]
] | In this paper we have took reissner nordstrom blackhole with cloud of strings and surrounds it with quintessence. we processed the metric through newman janis algorithm to get its rotating counterpart. the blackhole in study now is a roating charged blackhole with clouds of string surrounded by quintessence. we studied... |
2307.11475 | Robert van den Hoogen | R.J. van den Hoogen, A.A. Coley, and D.D. McNutt | Bianchi Type Cosmological Models in $f(T)$ Tele-parallel Gravity | 28 pages | JCAP10 (2023) 042 | 10.1088/1475-7516/2023/10/042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Symmetry assumptions on the geometrical framework have provided successful
mechanisms to develop physically meaningful solutions to many problems. In
tele-parallel gravity, invariance of the frame and spin-connection under a
group of motions defines an affine symmetry group. Here, we assume there exists
a three-dimen... | [
{
"created": "Fri, 21 Jul 2023 10:25:22 GMT",
"version": "v1"
}
] | 2024-02-28 | [
[
"Hoogen",
"R. J. van den",
""
],
[
"Coley",
"A. A.",
""
],
[
"McNutt",
"D. D.",
""
]
] | Symmetry assumptions on the geometrical framework have provided successful mechanisms to develop physically meaningful solutions to many problems. In tele-parallel gravity, invariance of the frame and spin-connection under a group of motions defines an affine symmetry group. Here, we assume there exists a three-dimensi... |
gr-qc/0408047 | Guoying Chee | G. Y. Chee, Yongxin Guo | Symmetric Hyperbolic System in the Self-dual Teleparallel Gravity | 8 pages, no figures | null | 10.1103/PhysRevD.70.044009 | null | gr-qc | null | In order to discuss the well-posed initial value formulation of the
teleparallel gravity and apply it to numerical relativity a symmetric
hyperbolic system in the self-dual teleparallel gravity which is equivalent to
the Ashtekar formulation is posed. This system is different from the ones in
other works by that the ... | [
{
"created": "Mon, 16 Aug 2004 16:00:34 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Chee",
"G. Y.",
""
],
[
"Guo",
"Yongxin",
""
]
] | In order to discuss the well-posed initial value formulation of the teleparallel gravity and apply it to numerical relativity a symmetric hyperbolic system in the self-dual teleparallel gravity which is equivalent to the Ashtekar formulation is posed. This system is different from the ones in other works by that the re... |
1603.01277 | Satadru Bag | Satadru Bag, Alexander Viznyuk, Yuri Shtanov and Varun Sahni | Cosmological perturbations on the Phantom brane | Matches published version | JCAP 07 (2016) 038 | 10.1088/1475-7516/2016/07/038 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a closed system of equations for scalar perturbations in a
multi-component braneworld. Our braneworld possesses a phantom-like equation of
state at late times, $w_{\rm eff} < -1$, but no big-rip future singularity. In
addition to matter and radiation, the braneworld possesses a new effective
degree of freed... | [
{
"created": "Thu, 3 Mar 2016 21:00:26 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2016 20:26:12 GMT",
"version": "v2"
}
] | 2016-07-27 | [
[
"Bag",
"Satadru",
""
],
[
"Viznyuk",
"Alexander",
""
],
[
"Shtanov",
"Yuri",
""
],
[
"Sahni",
"Varun",
""
]
] | We obtain a closed system of equations for scalar perturbations in a multi-component braneworld. Our braneworld possesses a phantom-like equation of state at late times, $w_{\rm eff} < -1$, but no big-rip future singularity. In addition to matter and radiation, the braneworld possesses a new effective degree of freedom... |
2312.10972 | Sukanya Mitra Dr. | Sukanya Mitra | Acausality in truncated 'MIS'-type theory | Accepted for publication in Physical Review D Letters | null | null | null | gr-qc hep-ph hep-th nucl-th | http://creativecommons.org/licenses/by/4.0/ | The causal-stable Muller-Israel-Stewart (MIS) theory is known to have a
finite number of out of equilibrium derivative order corrections but requires
treating the viscosity tensor as a separate degree of freedom with its own
equations of motion, apart from the fundamental fluid degrees of freedom like
velocity and te... | [
{
"created": "Mon, 18 Dec 2023 06:55:51 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2024 01:48:42 GMT",
"version": "v2"
}
] | 2024-05-22 | [
[
"Mitra",
"Sukanya",
""
]
] | The causal-stable Muller-Israel-Stewart (MIS) theory is known to have a finite number of out of equilibrium derivative order corrections but requires treating the viscosity tensor as a separate degree of freedom with its own equations of motion, apart from the fundamental fluid degrees of freedom like velocity and temp... |
1509.07398 | Mariam Bouhmadi-Lopez | Imanol Albarran, Mariam Bouhmadi-L\'opez, Francisco Cabral, Prado
Mart\'in-Moruno | The quantum realm of the "Little Sibling" of the Big Rip singularity | 17 pages, 2 figures, RevTex4-1 | JCAP 11 (2015) 044 | 10.1088/1475-7516/2015/11/044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the quantum behaviour of the "Little Sibling" of the Big Rip
singularity (LSBR) [1]. The quantisation is carried within the
geometrodynamical approach given by the Wheeler--DeWitt (WDW) equation. The
classical model is based on a Friedmann--Lema\^{i}tre--Robertson--Walker
Universe filled by a perfect fluid... | [
{
"created": "Thu, 24 Sep 2015 15:03:12 GMT",
"version": "v1"
}
] | 2015-12-02 | [
[
"Albarran",
"Imanol",
""
],
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Cabral",
"Francisco",
""
],
[
"Martín-Moruno",
"Prado",
""
]
] | We analyse the quantum behaviour of the "Little Sibling" of the Big Rip singularity (LSBR) [1]. The quantisation is carried within the geometrodynamical approach given by the Wheeler--DeWitt (WDW) equation. The classical model is based on a Friedmann--Lema\^{i}tre--Robertson--Walker Universe filled by a perfect fluid t... |
gr-qc/9604026 | null | M. Bianchi, E. Coccia, C.N. Colacino, V. Fafone, F. Fucito | Testing Theories of Gravity with a Spherical Gravitational Wave Detector | latex file, 16 pages, 1 figure | Class.Quant.Grav. 13 (1996) 2865-2874 | 10.1088/0264-9381/13/11/003 | ROM2F-96-15 | gr-qc hep-th | null | We consider the possibility of discriminating different theories of gravity
using a recently proposed gravitational wave detector of spherical shape. We
argue that the spin content of different theories can be extracted relating the
measurements of the excited spheroidal vibrational eigenmodes to the
Newman-Penrose p... | [
{
"created": "Fri, 12 Apr 1996 13:21:39 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Bianchi",
"M.",
""
],
[
"Coccia",
"E.",
""
],
[
"Colacino",
"C. N.",
""
],
[
"Fafone",
"V.",
""
],
[
"Fucito",
"F.",
""
]
] | We consider the possibility of discriminating different theories of gravity using a recently proposed gravitational wave detector of spherical shape. We argue that the spin content of different theories can be extracted relating the measurements of the excited spheroidal vibrational eigenmodes to the Newman-Penrose par... |
1308.1235 | Andrzej Rostworowski | Maciej Maliborski and Andrzej Rostworowski | Lecture Notes on Turbulent Instability of Anti-de Sitter Spacetime | Lecture notes from the NRHEP spring school held at IST-Lisbon, March
2013. To be published by IJMPA (V. Cardoso, L. Gualtieri, C. Herdeiro and U.
Sperhake, Eds., 2013); v2: sec. 6 and acknowledgments added, matches
published version | International Journal of Modern Physics A, Vol. 28 (2013) 1340020 | 10.1142/S0217751X13400204 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In these lecture notes we discuss recently conjectured instability of anti-de
Sitter space, resulting in gravitational collapse of a large class of
arbitrarily small initial perturbations. We uncover the technical details used
in the numerical study of spherically symmetric Einstein-massless scalar field
system with ... | [
{
"created": "Tue, 6 Aug 2013 11:04:01 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2013 07:27:13 GMT",
"version": "v2"
}
] | 2013-09-24 | [
[
"Maliborski",
"Maciej",
""
],
[
"Rostworowski",
"Andrzej",
""
]
] | In these lecture notes we discuss recently conjectured instability of anti-de Sitter space, resulting in gravitational collapse of a large class of arbitrarily small initial perturbations. We uncover the technical details used in the numerical study of spherically symmetric Einstein-massless scalar field system with ne... |
2102.10649 | Alexander Zhidenko | R. A. Konoplya, J. Kunz, A. Zhidenko | Blandford-Znajek mechanism in the general stationary axially-symmetric
black-hole spacetime | 8 pages, revtex | JCAP 12 (2021) 002 | 10.1088/1475-7516/2021/12/002 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Blandford-Znajek process of electromagnetic extraction of
energy from a general axially symmetric asymptotically flat slowly rotating
black hole. Using the general parametrization of the black-hole spacetime we
construct formulas for the flux of the magnetic field and the rate of energy
extraction, wh... | [
{
"created": "Sun, 21 Feb 2021 17:21:06 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Jul 2021 21:55:11 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Dec 2021 22:21:01 GMT",
"version": "v3"
}
] | 2021-12-03 | [
[
"Konoplya",
"R. A.",
""
],
[
"Kunz",
"J.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We consider the Blandford-Znajek process of electromagnetic extraction of energy from a general axially symmetric asymptotically flat slowly rotating black hole. Using the general parametrization of the black-hole spacetime we construct formulas for the flux of the magnetic field and the rate of energy extraction, whic... |
1512.06672 | T. Padmanabhan | T. Padmanabhan | One hundred years of General Relativity: Summary, Status and Prospects | Extended version of: (a) Guest Editorial written for Current Science
and (b) Plenary Talk at the 28th Texas Symposium on Relativistic Astrophysics
(Geneva, 13-18 Dec); 13 pages; no figures | Current Science, 109, 1215-1219 (2015) | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity (GR) revolutionized the way we thought about gravity.
After briefly describing the key successes of GR and its impact, I will discuss
the major conceptual challenges it faces today. I conclude by outlining the
prospective future directions of development, which hold the promise of
deepening our und... | [
{
"created": "Mon, 21 Dec 2015 15:46:08 GMT",
"version": "v1"
}
] | 2015-12-22 | [
[
"Padmanabhan",
"T.",
""
]
] | General Relativity (GR) revolutionized the way we thought about gravity. After briefly describing the key successes of GR and its impact, I will discuss the major conceptual challenges it faces today. I conclude by outlining the prospective future directions of development, which hold the promise of deepening our under... |
1001.3267 | Przemyslaw Malkiewicz | Przemyslaw Malkiewicz | Propagation of extended objects across singularity of time dependent
orbifold | 4 pages, prepared for the proceedings of the Grassmannian Conference
in Fundamental Cosmology (Grasscosmofun'09), 14-19 September 2009, Szczecin,
Poland | Annalen Phys.19:304-307,2010 | 10.1002/andp.201010433 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we argue that the compactified Milne space is a promising model
of the cosmological singularity. It is shown that extended objects like strings
propagate in a well-defined manner across the singularity of the embedding
space. Then a proposal for quantization of extended objects in the case of a
membrane... | [
{
"created": "Tue, 19 Jan 2010 11:57:35 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Malkiewicz",
"Przemyslaw",
""
]
] | In this paper we argue that the compactified Milne space is a promising model of the cosmological singularity. It is shown that extended objects like strings propagate in a well-defined manner across the singularity of the embedding space. Then a proposal for quantization of extended objects in the case of a membrane i... |
2105.07929 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Maximum force and cosmic censorship | 7 pages, no figures, to appear in Phys. Rev. D | null | 10.1103/PhysRevD.103.124010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although the idea that there is a maximum force in nature seems untenable, we
explore whether this concept can make sense in the restricted context of black
holes. We discuss uniformly accelerated and cosmological black holes and we
find that, although a maximum force acting on these black holes can in
principle be i... | [
{
"created": "Mon, 17 May 2021 15:08:51 GMT",
"version": "v1"
}
] | 2021-06-16 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | Although the idea that there is a maximum force in nature seems untenable, we explore whether this concept can make sense in the restricted context of black holes. We discuss uniformly accelerated and cosmological black holes and we find that, although a maximum force acting on these black holes can in principle be int... |
2205.13569 | Haroldo Cilas Duarte Lima Junior | Haroldo C. D. Lima Junior, Mateus M. Corr\^ea, Caio F. B. Macedo and
Lu\'is C. B. Crispino | Tidal forces in dirty black hole spacetimes | Published in The European Physical Journal C | null | 10.1140/epjc/s10052-022-10410-0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Black holes can be inserted in very rich astrophysical environments, such as
accretion disks. Although isolated black holes are simple objects in general
relativity, their accretion disks may significantly enrich the field
configurations of their surroundings. Alternative theories of gravity can lead
to novel black h... | [
{
"created": "Thu, 26 May 2022 18:17:43 GMT",
"version": "v1"
}
] | 2022-05-30 | [
[
"Junior",
"Haroldo C. D. Lima",
""
],
[
"Corrêa",
"Mateus M.",
""
],
[
"Macedo",
"Caio F. B.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Black holes can be inserted in very rich astrophysical environments, such as accretion disks. Although isolated black holes are simple objects in general relativity, their accretion disks may significantly enrich the field configurations of their surroundings. Alternative theories of gravity can lead to novel black hol... |
2403.18606 | Lai Zhao | Lai Zhao, Meirong Tang, Zhaoyi Xu | The Lensing Effect of Quantum-Corrected Black Hole and Parameter
Constraints from EHT Observations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum-corrected black hole model demonstrates significant potential in
the study of gravitational lensing effects. By incorporating quantum effects,
this model addresses the singularity problem in classical black holes. In this
paper, we investigate the impact of the quantum correction parameter on the
lensing ... | [
{
"created": "Wed, 27 Mar 2024 14:24:43 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jul 2024 13:43:30 GMT",
"version": "v2"
}
] | 2024-07-31 | [
[
"Zhao",
"Lai",
""
],
[
"Tang",
"Meirong",
""
],
[
"Xu",
"Zhaoyi",
""
]
] | The quantum-corrected black hole model demonstrates significant potential in the study of gravitational lensing effects. By incorporating quantum effects, this model addresses the singularity problem in classical black holes. In this paper, we investigate the impact of the quantum correction parameter on the lensing ef... |
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