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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2401.04877 | Valerio Faraoni | Numa Karolinski and Valerio Faraoni | Einstein gravity as the thermal equilibrium state of a nonminimally
coupled scalar field geometry | 13 pages, latex, one figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We test ideas of the recently proposed first-order thermodynamics of
scalar-tensor gravity using an exact geometry sourced by a conformally coupled
scalar field. We report a non-monotonic behaviour of the effective
``temperature of gravity'' not observed before and due to a new term in the
equation describing the rel... | [
{
"created": "Wed, 10 Jan 2024 02:07:17 GMT",
"version": "v1"
}
] | 2024-01-11 | [
[
"Karolinski",
"Numa",
""
],
[
"Faraoni",
"Valerio",
""
]
] | We test ideas of the recently proposed first-order thermodynamics of scalar-tensor gravity using an exact geometry sourced by a conformally coupled scalar field. We report a non-monotonic behaviour of the effective ``temperature of gravity'' not observed before and due to a new term in the equation describing the relax... |
0707.4681 | David Delphenich | David Delphenich | A more direct representation for complex relativity | 33 pages | AnnalenPhys.16:615-639,1997 | 10.1002/andp.200610250 | null | gr-qc | null | An alternative to the representation of complex relativity by self-dual
complex 2-forms on the spacetime manifold is presented by assuming that that
the bundle of real 2-forms is given an almost-complex structure. From this, one
can define a complex orthogonal structure on the bundle of 2-forms, which
results in a mo... | [
{
"created": "Tue, 31 Jul 2007 19:58:01 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Delphenich",
"David",
""
]
] | An alternative to the representation of complex relativity by self-dual complex 2-forms on the spacetime manifold is presented by assuming that that the bundle of real 2-forms is given an almost-complex structure. From this, one can define a complex orthogonal structure on the bundle of 2-forms, which results in a more... |
2302.01458 | Valerio Faraoni | Valerio Faraoni and Sonia Jose | Cosmological analogies for geophysical flows, Lagrangians, and new
analogue gravity systems | 8 pages, latex, to appear in Eur. Phys. J. C | null | 10.1140/epjc/s10052-023-11292-6 | null | gr-qc physics.geo-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Formal analogies between the ordinary differential equations describing
geophysical flows and Friedmann cosmology are developed. As a result, one
obtains Lagrangian and Hamiltonian formulations of these equations, while
laboratory experiments aimed at testing geophysical flows are shown to
constitute analogue gravity... | [
{
"created": "Thu, 2 Feb 2023 23:02:22 GMT",
"version": "v1"
}
] | 2023-03-01 | [
[
"Faraoni",
"Valerio",
""
],
[
"Jose",
"Sonia",
""
]
] | Formal analogies between the ordinary differential equations describing geophysical flows and Friedmann cosmology are developed. As a result, one obtains Lagrangian and Hamiltonian formulations of these equations, while laboratory experiments aimed at testing geophysical flows are shown to constitute analogue gravity s... |
2401.01992 | Leandro Gomes G | Leandro G. Gomes | Breaking the Cosmological Principle into pieces: a prelude to the
intrinsically homogeneous and isotropic spacetimes | 22 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this manuscript, we show that three fundamental building blocks are
supporting the Cosmological Principle. The first of them states that there is a
special frame in the universe where the spatial geometry is intrinsically
homogeneous and isotropic. The second demands the existence of a fiducial
observer to whom th... | [
{
"created": "Wed, 3 Jan 2024 21:50:42 GMT",
"version": "v1"
}
] | 2024-01-05 | [
[
"Gomes",
"Leandro G.",
""
]
] | In this manuscript, we show that three fundamental building blocks are supporting the Cosmological Principle. The first of them states that there is a special frame in the universe where the spatial geometry is intrinsically homogeneous and isotropic. The second demands the existence of a fiducial observer to whom the ... |
gr-qc/9501010 | S\vren Holst | S\"oren Holst (Institute for Theoretical Physics, Stockholm
University) | Gott time machines in the Anti-de Sitter space | 11 pages | Gen.Rel.Grav. 28 (1996) 387-403 | 10.1007/BF02105083 | USITP-95-01 | gr-qc | null | In 1991 Gott presented a solution of Einstein's field equations in 2+1
dimensions with $\Lambda = 0$ that contained closed timelike curves (CTC's).
This solution was remarkable because at first it did not seem to be unphysical
in any other respect. Later, however, it was shown that Gott's solution is
tachyonic in a c... | [
{
"created": "Thu, 12 Jan 1995 13:35:37 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Holst",
"Sören",
"",
"Institute for Theoretical Physics, Stockholm\n University"
]
] | In 1991 Gott presented a solution of Einstein's field equations in 2+1 dimensions with $\Lambda = 0$ that contained closed timelike curves (CTC's). This solution was remarkable because at first it did not seem to be unphysical in any other respect. Later, however, it was shown that Gott's solution is tachyonic in a cer... |
2007.05371 | Bogeun Gwak | Supakchai Ponglertsakul and Bogeun Gwak | Radiation Spectra and Effective Temperatures in Higher-Dimensional
Charged-de Sitter Black Holes | 36 pages, 33 figures, published in PRD | Phys. Rev. D 104, 024028 (2021) | 10.1103/PhysRevD.104.024028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, a scalar field propagating in a higher-dimensional
Reissner-Nordstr\"om-de Sitter black hole is investigated. Scalar fields are
assumed to have non-minimal coupling to the brane or bulk scalar curvature.
Five different {definitions} of black hole temperatures are discussed:
temperature based on surface... | [
{
"created": "Fri, 10 Jul 2020 13:13:04 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jul 2021 14:04:39 GMT",
"version": "v2"
}
] | 2021-07-16 | [
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Gwak",
"Bogeun",
""
]
] | In this study, a scalar field propagating in a higher-dimensional Reissner-Nordstr\"om-de Sitter black hole is investigated. Scalar fields are assumed to have non-minimal coupling to the brane or bulk scalar curvature. Five different {definitions} of black hole temperatures are discussed: temperature based on surface g... |
2001.09378 | Luis Nunez A | J. Ospino and L.A. Nunez | Karmarkar scalar condition | 13 pages, 1 figures. arXiv admin note: text overlap with
arXiv:1810.03059 | null | 10.1140/epjc/s10052-020-7738-8 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present the Karmarkar condition in terms of the structure
scalars obtained from the orthogonal decomposition of the Riemann tensor. This
the new expression becomes an algebraic relation among the physical variables,
and not a differential equation between the metric coefficients. By using the
Karmarka... | [
{
"created": "Sun, 26 Jan 2020 00:41:52 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Ospino",
"J.",
""
],
[
"Nunez",
"L. A.",
""
]
] | In this work we present the Karmarkar condition in terms of the structure scalars obtained from the orthogonal decomposition of the Riemann tensor. This the new expression becomes an algebraic relation among the physical variables, and not a differential equation between the metric coefficients. By using the Karmarkar ... |
1105.2405 | Plyatsko Roman | Roman Plyatsko, Oleksandr Stefanyshyn, Mykola Fenyk | On a Representation of Mathisson-Papaetrou-Dixon Equations in the Kerr
Metric | 15 pages | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New representation of the exact Mathisson-Papapetrou-Dixon equations at the
Mathisson-Pirani condition in the Kerr metric which does not contain the
third-order derivatives of the coordinates of a spinning particle is obtained.
For this purpose the integrals of energy and angular momentum of the spinning
particle as ... | [
{
"created": "Thu, 12 May 2011 08:57:46 GMT",
"version": "v1"
}
] | 2011-05-13 | [
[
"Plyatsko",
"Roman",
""
],
[
"Stefanyshyn",
"Oleksandr",
""
],
[
"Fenyk",
"Mykola",
""
]
] | New representation of the exact Mathisson-Papapetrou-Dixon equations at the Mathisson-Pirani condition in the Kerr metric which does not contain the third-order derivatives of the coordinates of a spinning particle is obtained. For this purpose the integrals of energy and angular momentum of the spinning particle as we... |
gr-qc/0301004 | John J. Oh | Sung-Won Kim, Won Tae Kim, John J. Oh, Ki-Hyuk Yee | Duality of Quasilocal Gravitational Energy and Charges with
Non-orthogonal Boundaries | 19pages, 1figure, RevTex | Phys.Rev. D67 (2003) 104027 | 10.1103/PhysRevD.67.104027 | SOGANG-HEP 303/02 | gr-qc hep-th | null | We study the duality of quasilocal energy and charges with non-orthogonal
boundaries in the (2+1)-dimensional low-energy string theory. Quasilocal
quantities shown in the previous work and some new variables arisen from
considering the non-orthogonal boundaries as well are presented, and the boost
relations between t... | [
{
"created": "Thu, 2 Jan 2003 06:29:06 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kim",
"Sung-Won",
""
],
[
"Kim",
"Won Tae",
""
],
[
"Oh",
"John J.",
""
],
[
"Yee",
"Ki-Hyuk",
""
]
] | We study the duality of quasilocal energy and charges with non-orthogonal boundaries in the (2+1)-dimensional low-energy string theory. Quasilocal quantities shown in the previous work and some new variables arisen from considering the non-orthogonal boundaries as well are presented, and the boost relations between tho... |
2304.14035 | Piyabut Burikham | Byon N. Jayawiguna, Piyabut Burikham | Gravitational Perturbation in Nonlocal Modified Tolman VII Model | 35 pages, 12 figures, 4 tables | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In comparison to the original Tolman VII model, Exact Modified Tolman VII
(EMTVII) with one additional parameter can increase the compactness of compact
object. When the compactness is in the ultracompact regime, the quasinormal
modes~(QNMs) of the trapped mode as well as the gravitational echoes become
more viable. ... | [
{
"created": "Thu, 27 Apr 2023 09:00:15 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2023 07:16:15 GMT",
"version": "v2"
},
{
"created": "Sun, 31 Dec 2023 08:37:52 GMT",
"version": "v3"
}
] | 2024-01-02 | [
[
"Jayawiguna",
"Byon N.",
""
],
[
"Burikham",
"Piyabut",
""
]
] | In comparison to the original Tolman VII model, Exact Modified Tolman VII (EMTVII) with one additional parameter can increase the compactness of compact object. When the compactness is in the ultracompact regime, the quasinormal modes~(QNMs) of the trapped mode as well as the gravitational echoes become more viable. St... |
1701.02098 | Jose Luis Hernandez-Pastora | J.L. Hernandez-Pastora and L. Herrera | Interior solution for the Kerr metric | 10 pages, 7 figures and 1 table. Published in Physical Revew D. arXiv
admin note: substantial text overlap with arXiv:1607.02315 | Phys. Rev.D95, 024003, (2017) | 10.1103/PhysRevD.95.024003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A, recently presented, general procedure to find static and axially
symmetric, interior solutions to the Einstein equations, is extended to the
stationary case, and applied to find an interior solution for the Kerr metric.
The solution, which is generated by an anisotropic fluid, verifies the energy
conditions for a ... | [
{
"created": "Mon, 9 Jan 2017 09:07:16 GMT",
"version": "v1"
}
] | 2017-01-10 | [
[
"Hernandez-Pastora",
"J. L.",
""
],
[
"Herrera",
"L.",
""
]
] | A, recently presented, general procedure to find static and axially symmetric, interior solutions to the Einstein equations, is extended to the stationary case, and applied to find an interior solution for the Kerr metric. The solution, which is generated by an anisotropic fluid, verifies the energy conditions for a wi... |
gr-qc/0611010 | Nicolae Tarfulea | Douglas N. Arnold and Nicolae Tarfulea | Boundary conditions for the Einstein-Christoffel formulation of
Einstein's equations | null | null | null | null | gr-qc | null | Specifying boundary conditions continues to be a challenge in numerical
relativity in order to obtain a long time convergent numerical simulation of
Einstein's equations in domains with artificial boundaries. In this paper, we
address this problem for the Einstein--Christoffel (EC) symmetric hyperbolic
formulation of... | [
{
"created": "Thu, 2 Nov 2006 01:05:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Arnold",
"Douglas N.",
""
],
[
"Tarfulea",
"Nicolae",
""
]
] | Specifying boundary conditions continues to be a challenge in numerical relativity in order to obtain a long time convergent numerical simulation of Einstein's equations in domains with artificial boundaries. In this paper, we address this problem for the Einstein--Christoffel (EC) symmetric hyperbolic formulation of E... |
0909.4150 | Andrea Geralico | Donato Bini, Andrea Geralico, Orlando Luongo and Hernando Quevedo | Generalized Kerr spacetime with an arbitrary mass quadrupole moment:
geometric properties vs particle motion | 24 pages, IOP macros used, eps figures n. 28; to appear on Classical
and Quantum Gravity, 2009 | Class.Quant.Grav.26:225006,2009 | 10.1088/0264-9381/26/22/225006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact solution of Einstein's field equations in empty space first found in
1985 by Quevedo and Mashhoon is analyzed in detail. This solution generalizes
Kerr spacetime to include the case of matter with arbitrary mass quadrupole
moment and is specified by three parameters, the mass $M$, the angular momentum
per un... | [
{
"created": "Wed, 23 Sep 2009 08:27:06 GMT",
"version": "v1"
}
] | 2009-12-10 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Quevedo",
"Hernando",
""
]
] | An exact solution of Einstein's field equations in empty space first found in 1985 by Quevedo and Mashhoon is analyzed in detail. This solution generalizes Kerr spacetime to include the case of matter with arbitrary mass quadrupole moment and is specified by three parameters, the mass $M$, the angular momentum per unit... |
0804.1882 | Hakan Andreasson | Hakan Andreasson | Sharp bounds on the critical stability radius for relativistic charged
spheres | 20 pages, 1 figure | Commun. Math. Phys. 288, 715-730 (2009). | 10.1007/s00220-008-0690-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper by Giuliani and Rothman \cite{GR}, the problem of finding a
lower bound on the radius $R$ of a charged sphere with mass M and charge Q<M is
addressed. Such a bound is referred to as the critical stability radius.
Equivalently, it can be formulated as the problem of finding an upper bound on
M for gi... | [
{
"created": "Fri, 11 Apr 2008 11:58:45 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Andreasson",
"Hakan",
""
]
] | In a recent paper by Giuliani and Rothman \cite{GR}, the problem of finding a lower bound on the radius $R$ of a charged sphere with mass M and charge Q<M is addressed. Such a bound is referred to as the critical stability radius. Equivalently, it can be formulated as the problem of finding an upper bound on M for give... |
1302.3055 | Kourosh Nozari | Kourosh Nozari and N. Rashidi | Cosmological dynamics of a hybrid chameleon scenario | 10 pages, Accepted for Publication in Adv. High Energy Phys | Adv.High Energy Phys. 2013 (2013) 803735 | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a hybrid scalar field which is non-minimally coupled to the
matter and models a chameleon cosmology. By introducing an effective potential,
we study the dependence of the effective potential's minimum and hybrid
chameleon field's masses to the local matter density. In a dynamical system
technique, we anal... | [
{
"created": "Wed, 13 Feb 2013 11:24:31 GMT",
"version": "v1"
}
] | 2013-06-26 | [
[
"Nozari",
"Kourosh",
""
],
[
"Rashidi",
"N.",
""
]
] | We consider a hybrid scalar field which is non-minimally coupled to the matter and models a chameleon cosmology. By introducing an effective potential, we study the dependence of the effective potential's minimum and hybrid chameleon field's masses to the local matter density. In a dynamical system technique, we analyz... |
1710.05330 | Guo Yanhong | Yan-Hong Guo, Zhong-Xi Yu, and Ji-rong Ren | Catalyst type of interactions between dark energy and dark matter | 8 pages,3 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we focus on three specific interactions of dark sector in the
existence of baryonic matter and radiation. First, we attempt to assume
baryonic matter and radiation can affect the conversion between dark energy and
dark matter like the way catalyst influences the conversion rate of two
materials in some... | [
{
"created": "Sun, 15 Oct 2017 13:23:56 GMT",
"version": "v1"
}
] | 2017-10-17 | [
[
"Guo",
"Yan-Hong",
""
],
[
"Yu",
"Zhong-Xi",
""
],
[
"Ren",
"Ji-rong",
""
]
] | In this paper, we focus on three specific interactions of dark sector in the existence of baryonic matter and radiation. First, we attempt to assume baryonic matter and radiation can affect the conversion between dark energy and dark matter like the way catalyst influences the conversion rate of two materials in some r... |
gr-qc/0702117 | Guillermo A. Mena Marugan | Jeronimo Cortez, Guillermo A. Mena Marugan, Jose M. Velhinho | Uniqueness of the Fock quantization of the Gowdy $T^3$ model | 14 pages | Phys.Rev.D75:084027,2007 | 10.1103/PhysRevD.75.084027 | null | gr-qc | null | After its reduction by a gauge-fixing procedure, the family of linearly
polarized Gowdy $T^3$ cosmologies admit a scalar field description whose
evolution is governed by a Klein-Gordon type equation in a flat background in
1+1 dimensions with the spatial topology of $S^1$, though in the presence of a
time-dependent p... | [
{
"created": "Wed, 21 Feb 2007 16:39:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cortez",
"Jeronimo",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
],
[
"Velhinho",
"Jose M.",
""
]
] | After its reduction by a gauge-fixing procedure, the family of linearly polarized Gowdy $T^3$ cosmologies admit a scalar field description whose evolution is governed by a Klein-Gordon type equation in a flat background in 1+1 dimensions with the spatial topology of $S^1$, though in the presence of a time-dependent pot... |
1205.2224 | Kirill Bronnikov | K. A. Bronnikov, R. A. Konoplya, A. Zhidenko | Instabilities of wormholes and regular black holes supported by a
phantom scalar field | 12 pages, 9 figures. Final version published in PRD. Eqs (29) and
(30) corrected | Phys. Rev. D 86, 024028 (2012) | 10.1103/PhysRevD.86.024028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We test the stability of various wormholes and black holes supported by a
scalar field with a negative kinetic term. The general axial perturbations and
the monopole type of polar perturbations are considered in the linear
approximation. Two classes of objects are considered: (i) wormholes with flat
asymptotic behavi... | [
{
"created": "Thu, 10 May 2012 10:23:37 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jul 2012 04:46:16 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Jul 2013 17:02:57 GMT",
"version": "v3"
}
] | 2013-07-15 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We test the stability of various wormholes and black holes supported by a scalar field with a negative kinetic term. The general axial perturbations and the monopole type of polar perturbations are considered in the linear approximation. Two classes of objects are considered: (i) wormholes with flat asymptotic behavior... |
2102.09623 | Marcos Leopoldo Wayhs Basso | Marcos L. W. Basso and Jonas Maziero | The Effect of Stationary Axisymmetric Spacetimes in Interferometric
Visibility | 11 pages, 4 figures. arXiv admin note: text overlap with
arXiv:2101.06320 | Gen. Relativ. Gravit. 53, 70 (2021) | 10.1007/s10714-021-02840-0 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we consider a scenario in which a spin-1/2 quanton goes
through a superposition of co-rotating and counter-rotating geodetic circular
paths, which play the role of the paths of a Mach-Zehnder interferometer in a
stationary and axisymmetric spacetime. Since the spin of the particle plays the
role o... | [
{
"created": "Thu, 18 Feb 2021 21:28:11 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jul 2021 22:18:21 GMT",
"version": "v2"
}
] | 2021-07-23 | [
[
"Basso",
"Marcos L. W.",
""
],
[
"Maziero",
"Jonas",
""
]
] | In this manuscript, we consider a scenario in which a spin-1/2 quanton goes through a superposition of co-rotating and counter-rotating geodetic circular paths, which play the role of the paths of a Mach-Zehnder interferometer in a stationary and axisymmetric spacetime. Since the spin of the particle plays the role of ... |
1807.00043 | William East | William E. East | Massive Boson Superradiant Instability of Black Holes: Nonlinear Growth,
Saturation, and Gravitational Radiation | 7 pages, 5 figures; revised to match PRL version | Phys. Rev. Lett. 121, 131104 (2018) | 10.1103/PhysRevLett.121.131104 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the superradiant instability of a massive boson around a spinning
black hole in full general relativity without assuming spatial symmetries. We
focus on the case of a rapidly spinning black hole in the presence of a vector
boson with a Compton wavelength comparable to the black hole radius, which is
the regi... | [
{
"created": "Fri, 29 Jun 2018 19:26:03 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Sep 2018 19:28:38 GMT",
"version": "v2"
}
] | 2018-09-28 | [
[
"East",
"William E.",
""
]
] | We study the superradiant instability of a massive boson around a spinning black hole in full general relativity without assuming spatial symmetries. We focus on the case of a rapidly spinning black hole in the presence of a vector boson with a Compton wavelength comparable to the black hole radius, which is the regime... |
2404.01659 | Tayyab Naseer | Tayyab Naseer, M. Sharif | Study of Decoupled Anisotropic Solutions in
$f(R,T,R_{\rho\eta}T^{\rho\eta})$ Theory | 29 pages, 10 figures | Universe 8(2022)62 | 10.3390/universe8020062 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider isotropic solution and extend it to two different
exact well-behaved spherical anisotropic solutions through minimal geometric
deformation method in $f(R,T,R_{\rho\eta}T^{\rho\eta})$ gravity. We only deform
the radial metric component that separates the field equations into two sets
corresp... | [
{
"created": "Tue, 2 Apr 2024 06:06:35 GMT",
"version": "v1"
}
] | 2024-04-03 | [
[
"Naseer",
"Tayyab",
""
],
[
"Sharif",
"M.",
""
]
] | In this paper, we consider isotropic solution and extend it to two different exact well-behaved spherical anisotropic solutions through minimal geometric deformation method in $f(R,T,R_{\rho\eta}T^{\rho\eta})$ gravity. We only deform the radial metric component that separates the field equations into two sets correspon... |
2111.09857 | Athanasios Bakopoulos | Athanasios Bakopoulos, Christos Charmousis, Panagiota Kanti | Traversable wormholes in beyond Horndeski theories | null | JCAP05(2022)022 | 10.1088/1475-7516/2022/05/022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a large class of explicit, asymptotically flat and regular
wormhole solutions in higher order scalar tensor theories. The solutions are
vacuum solutions of scalar tensor theory and no matter (exotic or regular) is
introduced in order to support them. They are constructed via a general
disformal transform... | [
{
"created": "Thu, 18 Nov 2021 18:35:23 GMT",
"version": "v1"
},
{
"created": "Sun, 15 May 2022 20:16:40 GMT",
"version": "v2"
}
] | 2022-05-17 | [
[
"Bakopoulos",
"Athanasios",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Kanti",
"Panagiota",
""
]
] | We construct a large class of explicit, asymptotically flat and regular wormhole solutions in higher order scalar tensor theories. The solutions are vacuum solutions of scalar tensor theory and no matter (exotic or regular) is introduced in order to support them. They are constructed via a general disformal transformat... |
1712.03294 | Jeffrey Winicour | Istv\'an R\'acz and Jeffrey Winicour | Toward computing gravitational initial data without elliptic solvers | Title and presentation changed | Classical and Quantum Gravity, v. 35, p. 135002 (2018) | 10.1088/1361-6382/aac5c5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two new methods have been proposed for solving the gravitational constraints
without using elliptic solvers by formulating them as either an
algebraic-hyperbolic or parabolic-hyperbolic system. Here, we compare these two
methods and present a unified computational infrastructure for their
implementation as numerical ... | [
{
"created": "Fri, 8 Dec 2017 22:07:01 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Apr 2018 14:29:06 GMT",
"version": "v2"
}
] | 2018-08-28 | [
[
"Rácz",
"István",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | Two new methods have been proposed for solving the gravitational constraints without using elliptic solvers by formulating them as either an algebraic-hyperbolic or parabolic-hyperbolic system. Here, we compare these two methods and present a unified computational infrastructure for their implementation as numerical ev... |
2312.12557 | V. N. Yershov | V.N. Yershov, A.A. Raikov and E.A. Popova | Two-body problem in curved spacetime: exploring gravitational wave
transient cases | 27 pages, 4 figures, 2 tables | Physica Scripta, 2023, 98, 075019 | 10.1088/1402-4896/ace00c | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare two versions of the GW150914 gravitational wave signal analysis by
the LIGO/Virgo collaboration. The first version was published in 2016 by this
collaboration along with their announcement of the first experimental detection
of gravitational waves. It was based on the gravitational wave waveforms with
the ... | [
{
"created": "Tue, 19 Dec 2023 19:53:26 GMT",
"version": "v1"
}
] | 2023-12-21 | [
[
"Yershov",
"V. N.",
""
],
[
"Raikov",
"A. A.",
""
],
[
"Popova",
"E. A.",
""
]
] | We compare two versions of the GW150914 gravitational wave signal analysis by the LIGO/Virgo collaboration. The first version was published in 2016 by this collaboration along with their announcement of the first experimental detection of gravitational waves. It was based on the gravitational wave waveforms with the fu... |
2306.11285 | Nobuyoshi Komatsu | Nobuyoshi Komatsu | Evolution of thermodynamic quantities on cosmological horizon in
$\Lambda(t)$ model | Final version accepted for publication in PRD. A reference is
updated. [14 pages, 9 figures] | Phys. Rev. D 108, 083515 (2023) | 10.1103/PhysRevD.108.083515 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | The horizon of a flat Friedmann--Robertson--Walker (FRW) universe is
considered to be dynamic when the Hubble parameter $H$ and the Hubble radius
$r_{H}$ vary with time, unlike for de Sitter universes. To clarify the
thermodynamics on a dynamic horizon, the evolution of a dynamical
Kodama--Hayward temperature and Bek... | [
{
"created": "Tue, 20 Jun 2023 04:41:43 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Sep 2023 01:45:09 GMT",
"version": "v2"
}
] | 2023-10-17 | [
[
"Komatsu",
"Nobuyoshi",
""
]
] | The horizon of a flat Friedmann--Robertson--Walker (FRW) universe is considered to be dynamic when the Hubble parameter $H$ and the Hubble radius $r_{H}$ vary with time, unlike for de Sitter universes. To clarify the thermodynamics on a dynamic horizon, the evolution of a dynamical Kodama--Hayward temperature and Beken... |
1201.4904 | Gabor Kunstatter | Gabor Kunstatter, Tim Taves and Hideki Maeda | Geometrodynamics of spherically symmetric Lovelock gravity | 10 pages, references and derivation details added, final version
accepted by CQG (Fast Track) | Class.Quant.Grav. 29 (2012) 092001 | 10.1088/0264-9381/29/9/092001 | CECS-PHY-12/01 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the Hamiltonian for spherically symmetric Lovelock gravity using
the geometrodynamics approach pioneered by Kucha\v{r} in the context of
four-dimensional general relativity. When written in terms of the areal radius,
the generalized Misner-Sharp mass and their conjugate momenta, the generic
Lovelock action ... | [
{
"created": "Tue, 24 Jan 2012 01:37:33 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Mar 2012 20:45:23 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Kunstatter",
"Gabor",
""
],
[
"Taves",
"Tim",
""
],
[
"Maeda",
"Hideki",
""
]
] | We derive the Hamiltonian for spherically symmetric Lovelock gravity using the geometrodynamics approach pioneered by Kucha\v{r} in the context of four-dimensional general relativity. When written in terms of the areal radius, the generalized Misner-Sharp mass and their conjugate momenta, the generic Lovelock action an... |
0809.1214 | Ettore Minguzzi | E. Minguzzi | K-causality coincides with stable causality | 11 pages, 2 figures | Commun.Math.Phys.290:239-248,2009 | 10.1007/s00220-009-0794-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is proven that K-causality coincides with stable causality, and that in a
K-causal spacetime the relation K^+ coincides with the Seifert's relation. As a
consequence the causal relation "the spacetime is strongly causal and the
closure of the causal relation is transitive" stays between stable causality
and causal... | [
{
"created": "Sun, 7 Sep 2008 10:03:58 GMT",
"version": "v1"
}
] | 2011-06-24 | [
[
"Minguzzi",
"E.",
""
]
] | It is proven that K-causality coincides with stable causality, and that in a K-causal spacetime the relation K^+ coincides with the Seifert's relation. As a consequence the causal relation "the spacetime is strongly causal and the closure of the causal relation is transitive" stays between stable causality and causal c... |
1107.3964 | Oleg Zaslavskii | O. B. Zaslavskii | Acceleration of particles by rotating black holes: near-horizon geometry
and kinematics | 8 pages | Grav. and Cosmol., 18 (2012) 139 | 10.1134/S0202289312020144 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nowadays, the effect of infinite energy in the centre of mass frame due to
near-horizon collisions attracts much attention.We show generality of the
effect combining two seemingly completely different approaches based on
properties of a particle with respect to its local light cone and calculating
its velocity in the... | [
{
"created": "Wed, 20 Jul 2011 13:07:55 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Zaslavskii",
"O. B.",
""
]
] | Nowadays, the effect of infinite energy in the centre of mass frame due to near-horizon collisions attracts much attention.We show generality of the effect combining two seemingly completely different approaches based on properties of a particle with respect to its local light cone and calculating its velocity in the l... |
2304.06365 | Tayyaba Naz | Tayyaba Naz, G. Mustafa, M. Farasat Shamir | Existence of Wormholes in $f(\mathcal{G})$ Gravity using Symmetries | 10 pages, 7 figures | Int. J. Geom. Methods Mod. Phys. 19 (2022) 2250100 | 10.1142/S0219887822501006 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The current study examines the geometry of static wormholes with anisotropic
matter distribution in context of modified $f(\mathcal{G})$ gravity. We
consider the well known Noether and conformal symmetries, which help in
investigating wormholes in $f(\mathcal{G})$ gravity. For this purpose, we
develop symmetry genera... | [
{
"created": "Thu, 13 Apr 2023 09:39:33 GMT",
"version": "v1"
}
] | 2023-04-14 | [
[
"Naz",
"Tayyaba",
""
],
[
"Mustafa",
"G.",
""
],
[
"Shamir",
"M. Farasat",
""
]
] | The current study examines the geometry of static wormholes with anisotropic matter distribution in context of modified $f(\mathcal{G})$ gravity. We consider the well known Noether and conformal symmetries, which help in investigating wormholes in $f(\mathcal{G})$ gravity. For this purpose, we develop symmetry generato... |
1807.04512 | Aur\'elien Hees | A. Hees and O. Minazzoli and E. Savalle and Y. V. Stadnik and P. Wolf | Violation of the equivalence principle from light scalar dark matter | 19 pages, 4 figures, version accepted for publication in Phys. Rev. D
(references updated) | Phys. Rev. D 98, 064051 (2018) | 10.1103/PhysRevD.98.064051 | null | gr-qc hep-ph physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the local observational consequences of a violation
of the Einstein Equivalence Principle induced by models of light scalar Dark
Matter (DM). We focus on two different models where the scalar field couples
linearly or quadratically to the standard model of matter fields. For both
these cases, ... | [
{
"created": "Thu, 12 Jul 2018 10:14:54 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Sep 2018 18:50:10 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Sep 2018 18:53:37 GMT",
"version": "v3"
}
] | 2018-10-03 | [
[
"Hees",
"A.",
""
],
[
"Minazzoli",
"O.",
""
],
[
"Savalle",
"E.",
""
],
[
"Stadnik",
"Y. V.",
""
],
[
"Wolf",
"P.",
""
]
] | In this paper, we study the local observational consequences of a violation of the Einstein Equivalence Principle induced by models of light scalar Dark Matter (DM). We focus on two different models where the scalar field couples linearly or quadratically to the standard model of matter fields. For both these cases, we... |
1111.1437 | Yury F. Pirogov | Yu. F. Pirogov | Unimodular bimode gravity and the coherent scalar-graviton field as
galaxy dark matter | 38 pages, 10 figures; exposition improved, remarks added, accepted
for publication | Eur. Phys. J. C 72 (2012) 2017 | 10.1140/epjc/s10052-012-2017-y | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The explicit violation of the general gauge invariance/relativity is adopted
as the origin of dark matter and dark energy of the gravitational nature. The
violation of the local scale invariance alone, with the residual unimodular
one, is considered. Besides the four-volume preserving deformation mode -- the
transver... | [
{
"created": "Sun, 6 Nov 2011 17:03:04 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Nov 2011 15:02:47 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Sep 2012 19:32:51 GMT",
"version": "v3"
}
] | 2015-06-03 | [
[
"Pirogov",
"Yu. F.",
""
]
] | The explicit violation of the general gauge invariance/relativity is adopted as the origin of dark matter and dark energy of the gravitational nature. The violation of the local scale invariance alone, with the residual unimodular one, is considered. Besides the four-volume preserving deformation mode -- the transverse... |
gr-qc/9306034 | null | Joseph D. Romano | On the Constraint Algebra of Degenerate Relativity | 14 pages (Latex file), UMDGR-93-204 | Phys.Rev. D48 (1993) 5676-5683 | 10.1103/PhysRevD.48.5676 | null | gr-qc | null | As shown by Ashtekar in the mid 80's, general relativity can be extended to
incorporate degenerate metrics. This extension is not unique, however, as one
can change the form of the hamiltonian constraints and obtain an {\it
alternative} degenerate extension of general relativity that disagrees with
Ashtekar's origina... | [
{
"created": "Mon, 28 Jun 1993 16:27:10 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Romano",
"Joseph D.",
""
]
] | As shown by Ashtekar in the mid 80's, general relativity can be extended to incorporate degenerate metrics. This extension is not unique, however, as one can change the form of the hamiltonian constraints and obtain an {\it alternative} degenerate extension of general relativity that disagrees with Ashtekar's original ... |
1501.06676 | Jiliang Jing | Zehua Tian, Jieci Wang, Heng Fan, and Jiliang Jing | Relativistic Quantum Metrology in Open System Dynamics | 20 ppages, 4 figures | Scientific Reports, 07946 (2015) | 10.1038/srep07946 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum metrology studies the ultimate limit of precision in estimating a
physical quantity if quantum strategies are exploited. Here we investigate the
evolution of a two-level atom as a detector which interacts with a massless
scalar field using the master equation approach for open quantum system. We
employ local ... | [
{
"created": "Tue, 27 Jan 2015 07:55:29 GMT",
"version": "v1"
}
] | 2015-01-28 | [
[
"Tian",
"Zehua",
""
],
[
"Wang",
"Jieci",
""
],
[
"Fan",
"Heng",
""
],
[
"Jing",
"Jiliang",
""
]
] | Quantum metrology studies the ultimate limit of precision in estimating a physical quantity if quantum strategies are exploited. Here we investigate the evolution of a two-level atom as a detector which interacts with a massless scalar field using the master equation approach for open quantum system. We employ local qu... |
2201.12189 | Genly Le\'on | Andronikos Paliathanasis (DUT, Durban and Chile Austral U., Valdivia),
Genly Leon (Catolica del Norte U. and DUT, Durban) | $f(T,B)$ gravity in a Friedmann-Lema\^{\i}tre-Robertson-Walker universe
with nonzero spatial curvature | 18 pages. 4 compound figures | Math Meth Appl Sci. 2022;1-18 (2022) | 10.1002/mma.8728 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate exact solutions and the asymptotic dynamics for the
Friedmann-Lema\^{\i}tre-Robertson-Walker universe with nonzero spatial
curvature in the fourth-order modified teleparallel gravitational theory known
as $f\left( T, B\right) $ theory. We show that the field equations admit a
minisuperspace description... | [
{
"created": "Fri, 28 Jan 2022 15:41:45 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Sep 2022 09:10:27 GMT",
"version": "v2"
}
] | 2022-09-20 | [
[
"Paliathanasis",
"Andronikos",
"",
"DUT, Durban and Chile Austral U., Valdivia"
],
[
"Leon",
"Genly",
"",
"Catolica del Norte U. and DUT, Durban"
]
] | We investigate exact solutions and the asymptotic dynamics for the Friedmann-Lema\^{\i}tre-Robertson-Walker universe with nonzero spatial curvature in the fourth-order modified teleparallel gravitational theory known as $f\left( T, B\right) $ theory. We show that the field equations admit a minisuperspace description, ... |
2009.06817 | Lijing Shao | Lijing Shao | Pulsar tests of the graviton mass | 5 pages, 1 figure; submitted to Astronomische Nachrichten | Astron. Nachr. 342 (2021) 300 | 10.1002/asna.202113923 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Einstein's general relativity (GR), gravity is described by a massless
spin-2 metric field, and the extension of GR to include a mass term for the
graviton has profound implication for gravitation and cosmology. Besides the
gravity experiments carried out in the Solar System and those recently with
gravitational w... | [
{
"created": "Tue, 15 Sep 2020 01:46:22 GMT",
"version": "v1"
}
] | 2021-03-23 | [
[
"Shao",
"Lijing",
""
]
] | In Einstein's general relativity (GR), gravity is described by a massless spin-2 metric field, and the extension of GR to include a mass term for the graviton has profound implication for gravitation and cosmology. Besides the gravity experiments carried out in the Solar System and those recently with gravitational wav... |
1309.4231 | Uma Papnoi | Sushant G Ghosh, Uma Papnoi | Spinning Higher Dimensional Einstein-Yang-Mills black holes | Accepted for publication in EPJC | null | 10.1140/epjc/s10052-014-3016-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a Kerr-Newman-like spacetimes starting from higher dimensional
(HD) Einstein-Yang-Mills black holes via complex transformations suggested by
Newman-Janis. The new metrics are HD generalization of Kerr-Newman spacetimes
which has a geometry precisely that of Kerr-Newman in 4D corresponding to
Yang-Mills (... | [
{
"created": "Tue, 17 Sep 2013 08:51:40 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Aug 2014 05:12:54 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Ghosh",
"Sushant G",
""
],
[
"Papnoi",
"Uma",
""
]
] | We construct a Kerr-Newman-like spacetimes starting from higher dimensional (HD) Einstein-Yang-Mills black holes via complex transformations suggested by Newman-Janis. The new metrics are HD generalization of Kerr-Newman spacetimes which has a geometry precisely that of Kerr-Newman in 4D corresponding to Yang-Mills (YM... |
1106.6016 | Frank Hellmann | John W. Barrett and Frank Hellmann | Holonomy observables in Ponzano-Regge type state sum models | 15 pages, 2 figures | null | 10.1088/0264-9381/29/4/045006 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study observables on group elements in the Ponzano-Regge model. We show
that these observables have a natural interpretation in terms of Feynman
diagrams on a sphere and contrast them to the well studied observables on the
spin labels. We elucidate this interpretation by showing how they arise from
the no-gravity ... | [
{
"created": "Wed, 29 Jun 2011 18:06:01 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Barrett",
"John W.",
""
],
[
"Hellmann",
"Frank",
""
]
] | We study observables on group elements in the Ponzano-Regge model. We show that these observables have a natural interpretation in terms of Feynman diagrams on a sphere and contrast them to the well studied observables on the spin labels. We elucidate this interpretation by showing how they arise from the no-gravity li... |
0705.0122 | Luciano Gottardi | L. Gottardi, A.de Waard, A.Usenko, G.Frossati, M.Podt, J.Flokstra,
M.Bassan, V.Fafone, Y.Minenkov, A.Rocchi | Sensitivity of the spherical gravitational wave detector MiniGRAIL
operating at 5 K | 8 pages, 5 figures, submitted to Physical Review D | Phys.Rev.D76:102005,2007 | 10.1103/PhysRevD.76.102005 | null | gr-qc | null | We present the performances and the strain sensitivity of the first spherical
gravitational wave detector equipped with a capacitive transducer and read out
by a low noise two-stage SQUID amplifier and operated at a temperature of 5 K.
We characterized the detector performance in terms of thermal and electrical
noise... | [
{
"created": "Tue, 1 May 2007 15:13:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gottardi",
"L.",
""
],
[
"de Waard",
"A.",
""
],
[
"Usenko",
"A.",
""
],
[
"Frossati",
"G.",
""
],
[
"Podt",
"M.",
""
],
[
"Flokstra",
"J.",
""
],
[
"Bassan",
"M.",
""
],
[
"Fafone",
"V.",
... | We present the performances and the strain sensitivity of the first spherical gravitational wave detector equipped with a capacitive transducer and read out by a low noise two-stage SQUID amplifier and operated at a temperature of 5 K. We characterized the detector performance in terms of thermal and electrical noise i... |
1812.03136 | Yen Chin Ong | Yuan Yao, Meng-Shi Hou, Yen Chin Ong | A Complementary Third Law for Black Hole Thermodynamics | 10 pages, 5 figures; improved and published version | Eur. Phys. J. C 79 (2019) 513 | 10.1140/epjc/s10052-019-7003-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are some examples in the literature, in which despite the fact that the
underlying theory or model does not impose a lower bound on the size of black
holes, the final temperature under Hawking evaporation is nevertheless finite
and nonzero. We show that under some loose conditions, the black hole is
necessarily... | [
{
"created": "Fri, 7 Dec 2018 17:53:30 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jun 2019 07:34:36 GMT",
"version": "v2"
}
] | 2019-06-25 | [
[
"Yao",
"Yuan",
""
],
[
"Hou",
"Meng-Shi",
""
],
[
"Ong",
"Yen Chin",
""
]
] | There are some examples in the literature, in which despite the fact that the underlying theory or model does not impose a lower bound on the size of black holes, the final temperature under Hawking evaporation is nevertheless finite and nonzero. We show that under some loose conditions, the black hole is necessarily a... |
0708.2098 | Sourav Sur | Saurya Das (Lethbridge U.), S. Shankaranarayanan (Potsdam, Max Planck
Inst.), Sourav Sur (Lethbridge U.) | Where are the degrees of freedom responsible for black hole entropy? | 6 pages, 4 figures, Invited talk at Theory Canada III, Edmonton,
Alberta, Canada, June 16, 2007 | Can.J.Phys.86:653-658,2008 | 10.1139/P07-183 | null | gr-qc hep-th | null | Considering the entanglement between quantum field degrees of freedom inside
and outside the horizon as a plausible source of black hole entropy, we address
the question: {\it where are the degrees of freedom that give rise to this
entropy located?} When the field is in ground state, the black hole area law is
obeyed... | [
{
"created": "Wed, 15 Aug 2007 20:17:08 GMT",
"version": "v1"
}
] | 2008-11-07 | [
[
"Das",
"Saurya",
"",
"Lethbridge U."
],
[
"Shankaranarayanan",
"S.",
"",
"Potsdam, Max Planck\n Inst."
],
[
"Sur",
"Sourav",
"",
"Lethbridge U."
]
] | Considering the entanglement between quantum field degrees of freedom inside and outside the horizon as a plausible source of black hole entropy, we address the question: {\it where are the degrees of freedom that give rise to this entropy located?} When the field is in ground state, the black hole area law is obeyed a... |
1609.05756 | Olivier Sarbach | Manuel D. Morales and Olivier Sarbach | Evolution of scalar fields surrounding black holes on compactified
constant mean curvature hypersurfaces | Updated version which includes a discussion of the Newman-Penrose
scalar and which has some typos corrected. 33 pages, 19 figures, to appear in
Physical Review D | Phys. Rev. D 95, 044001 (2017) | 10.1103/PhysRevD.95.044001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the goal for high accuracy modeling of gravitational radiation
emitted by isolated systems, recently, there has been renewed interest in the
numerical solution of the hyperboloidal initial value problem for Einstein's
field equations in which the outer boundary of the numerical grid is placed at
null inf... | [
{
"created": "Mon, 19 Sep 2016 14:56:30 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2017 22:29:52 GMT",
"version": "v2"
}
] | 2017-02-08 | [
[
"Morales",
"Manuel D.",
""
],
[
"Sarbach",
"Olivier",
""
]
] | Motivated by the goal for high accuracy modeling of gravitational radiation emitted by isolated systems, recently, there has been renewed interest in the numerical solution of the hyperboloidal initial value problem for Einstein's field equations in which the outer boundary of the numerical grid is placed at null infin... |
1103.0346 | Koji Ishidoshiro | Koji Ishidoshiro, Masaki Ando, Akiteru Takamori, Hirotaka Takahashi,
Kenshi Okada, Nobuyuki Matsumoto, Wataru Kokuyama, Nobuyuki Kanda, Yoichi Aso
and Kimio Tsubono | Upper Limit on Gravitational Wave Backgrounds at 0.2 Hz with Torsion-bar
Antenna | 4 pages, 5 figures | Phys.Rev.Lett.106:161101,2011 | 10.1103/PhysRevLett.106.161101 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first upper limit on gravitational wave (GW) backgrounds at an
unexplored frequency of 0.2 Hz using a torsion-bar antenna (TOBA). A TOBA was
proposed to search for low-frequency GWs. We have developed a small-scaled TOBA
and successfully found {\Omega}gw(f) < 4.3 \times 1017 at 0.2 Hz as
demonstration ... | [
{
"created": "Wed, 2 Mar 2011 04:51:37 GMT",
"version": "v1"
}
] | 2011-05-09 | [
[
"Ishidoshiro",
"Koji",
""
],
[
"Ando",
"Masaki",
""
],
[
"Takamori",
"Akiteru",
""
],
[
"Takahashi",
"Hirotaka",
""
],
[
"Okada",
"Kenshi",
""
],
[
"Matsumoto",
"Nobuyuki",
""
],
[
"Kokuyama",
"Wataru",
""
... | We present the first upper limit on gravitational wave (GW) backgrounds at an unexplored frequency of 0.2 Hz using a torsion-bar antenna (TOBA). A TOBA was proposed to search for low-frequency GWs. We have developed a small-scaled TOBA and successfully found {\Omega}gw(f) < 4.3 \times 1017 at 0.2 Hz as demonstration of... |
gr-qc/0408070 | Dr. Anirudh Pradhan | Anirudh Pradhan, A. K. Yadav and L. Yadav | Generation of Bianchi type V cosmological models with varying
$\Lambda$-term | 16 pages, 3 figures, submitted to CJP | Czech.J.Phys.55:503-518,2005 | 10.1007/s10582-005-0057-3 | null | gr-qc | null | Bianchi type V perfect fluid cosmological models are investigated with
cosmological term $\Lambda$ varying with time. Using a generation technique
(Camci {\it et al.}, 2001), it is shown that the Einstein's field equations are
solvable for any arbitrary cosmic scale function. Solutions for particular
forms of cosmic ... | [
{
"created": "Fri, 20 Aug 2004 09:38:32 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Yadav",
"A. K.",
""
],
[
"Yadav",
"L.",
""
]
] | Bianchi type V perfect fluid cosmological models are investigated with cosmological term $\Lambda$ varying with time. Using a generation technique (Camci {\it et al.}, 2001), it is shown that the Einstein's field equations are solvable for any arbitrary cosmic scale function. Solutions for particular forms of cosmic sc... |
1512.04058 | Eugeny Babichev | Eugeny Babichev, Richard Brito, Paolo Pani | Linear stability of nonbidiagonal black holes in massive gravity | 13 pages, 2 figures; v2: References added; v3: matches published
version; v4: acknowledgement added | Phys. Rev. D 93, 044041 (2016) | 10.1103/PhysRevD.93.044041 | LPT-Orsay-16-06 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider generic linear perturbations of a nonbidiagonal class of static
black-hole solutions in massive (bi)gravity. We show that the quasinormal
spectrum of these solutions coincides with that of a Schwarzschild black hole
in general relativity, thus proving that these solutions are mode stable. This
is in contr... | [
{
"created": "Sun, 13 Dec 2015 14:35:31 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Dec 2015 19:12:33 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Feb 2016 14:15:09 GMT",
"version": "v3"
},
{
"created": "Fri, 16 Sep 2016 16:07:58 GMT",
"version": "v4"
}
] | 2016-09-19 | [
[
"Babichev",
"Eugeny",
""
],
[
"Brito",
"Richard",
""
],
[
"Pani",
"Paolo",
""
]
] | We consider generic linear perturbations of a nonbidiagonal class of static black-hole solutions in massive (bi)gravity. We show that the quasinormal spectrum of these solutions coincides with that of a Schwarzschild black hole in general relativity, thus proving that these solutions are mode stable. This is in contras... |
1504.06892 | Ismael Delgado Gaspar M.Sc. | I. Delgado Gaspar, A. P\'erez Mart\'inez, G. Piccinelli and Roberto A.
Sussman | A non-perturbative study of the evolution of cosmic magnetised sources | Accepted in General Relativity and Gravitation. The final publication
will be available at Springer via http://dx.doi.org/10.1007/s10714-015-2004-3 | null | 10.1007/s10714-015-2004-3 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We undertake a hydrodynamical study of a mixture of tightly coupled
primordial radiation, neutrinos, baryons, electrons and positrons, together
with a gas of already decoupled dark matter WIMPS and an already existing
"frozen" magnetic field in the infinite conductivity regime. Considering this
cosmic fluid as the so... | [
{
"created": "Sun, 26 Apr 2015 23:18:49 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Dec 2015 22:59:35 GMT",
"version": "v2"
}
] | 2015-12-08 | [
[
"Gaspar",
"I. Delgado",
""
],
[
"Martínez",
"A. Pérez",
""
],
[
"Piccinelli",
"G.",
""
],
[
"Sussman",
"Roberto A.",
""
]
] | We undertake a hydrodynamical study of a mixture of tightly coupled primordial radiation, neutrinos, baryons, electrons and positrons, together with a gas of already decoupled dark matter WIMPS and an already existing "frozen" magnetic field in the infinite conductivity regime. Considering this cosmic fluid as the sour... |
1710.09697 | Robert Monjo Dr | Robert Monjo | Study of the observational compatibility of an inhomogeneous cosmology
with linear expansion according to SNe Ia | 12 pages, 3 figures | Phys. Rev. D 96, 103505, 2017 | 10.1103/PhysRevD.96.103505 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most of current cosmological theories are built combining an isotropic and
homogeneous manifold with a scale factor that depends on time. If one supposes
a hyperconical universe with linear expansion, an inhomogeneous metric can be
obtained by an appropriate transformation that preserves the proper time. This
model l... | [
{
"created": "Tue, 24 Oct 2017 22:25:22 GMT",
"version": "v1"
},
{
"created": "Tue, 1 May 2018 21:38:28 GMT",
"version": "v2"
},
{
"created": "Sun, 17 Jun 2018 12:11:27 GMT",
"version": "v3"
},
{
"created": "Fri, 28 Sep 2018 21:44:03 GMT",
"version": "v4"
}
] | 2018-10-02 | [
[
"Monjo",
"Robert",
""
]
] | Most of current cosmological theories are built combining an isotropic and homogeneous manifold with a scale factor that depends on time. If one supposes a hyperconical universe with linear expansion, an inhomogeneous metric can be obtained by an appropriate transformation that preserves the proper time. This model loc... |
2212.12071 | Manuel Gonzalez-Espinoza | Manuel Gonzalez-Espinoza, Giovanni Otalora, Yoelsy Leyva, Joel
Saavedra | Dynamics of dark energy in a scalar-vector-torsion theory | 21 pages, 21 figures, version published in EPJ Plus | Eur. Phys. J. Plus 138, 600 (2023) | 10.1140/epjp/s13360-023-04237-1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological dynamics of dark energy in a scalar-vector-torsion
theory. The vector field is described by the cosmic triad and the scalar field
is of the quintessence type with non-minimal coupling to gravity. The coupling
to gravity is introduced through the interaction between the scalar field and
torsi... | [
{
"created": "Thu, 22 Dec 2022 23:07:03 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jul 2023 11:42:57 GMT",
"version": "v2"
}
] | 2023-07-11 | [
[
"Gonzalez-Espinoza",
"Manuel",
""
],
[
"Otalora",
"Giovanni",
""
],
[
"Leyva",
"Yoelsy",
""
],
[
"Saavedra",
"Joel",
""
]
] | We study the cosmological dynamics of dark energy in a scalar-vector-torsion theory. The vector field is described by the cosmic triad and the scalar field is of the quintessence type with non-minimal coupling to gravity. The coupling to gravity is introduced through the interaction between the scalar field and torsion... |
1806.10119 | Mahmood Roshan | Elham Nazari and Mahmood Roshan | Post-Newtonian magnetohydrodynamics | Accepted version in ApJ | The Astrophysical Journal, Volume 868 (2018), Number 2, 1-14 | 10.3847/1538-4357/aaeb25 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we derive the post-Newtonian equations of the ideal
Magnetohydrodynamics. To do so, we use the modern approach to post-Newtonian
theory, where the harmonic gauge is used instead of the standard post-Newtonian
gauge, and find the post-Newtonian metric in the presence of the
electromagnetic fields. We sh... | [
{
"created": "Tue, 26 Jun 2018 17:29:35 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Aug 2018 16:40:36 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Oct 2018 08:05:41 GMT",
"version": "v3"
}
] | 2018-12-04 | [
[
"Nazari",
"Elham",
""
],
[
"Roshan",
"Mahmood",
""
]
] | In this paper, we derive the post-Newtonian equations of the ideal Magnetohydrodynamics. To do so, we use the modern approach to post-Newtonian theory, where the harmonic gauge is used instead of the standard post-Newtonian gauge, and find the post-Newtonian metric in the presence of the electromagnetic fields. We show... |
2312.17073 | Ufuk Aydemir | Ufuk Aydemir | Axion dark matter with not quite black hole domination | 26 pages, 3 figures. Minor changes in the text, typos fixed,
references added. Published version | Turk. J. Phys. 48 (2024) 3, 50-74 | 10.55730/1300-0101.2758 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | We investigate the effects of an early cosmological period dominated by
primordial 2-2-holes on axion dark matter. The 2-2-holes emerge as a new family
of horizonless classical solutions for ultracompact matter distributions in
quadratic gravity, a candidate theory of quantum gravity. Thermal 2-2-holes,
sourced by re... | [
{
"created": "Thu, 28 Dec 2023 15:35:49 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2024 09:56:20 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Jun 2024 14:31:06 GMT",
"version": "v3"
}
] | 2024-06-26 | [
[
"Aydemir",
"Ufuk",
""
]
] | We investigate the effects of an early cosmological period dominated by primordial 2-2-holes on axion dark matter. The 2-2-holes emerge as a new family of horizonless classical solutions for ultracompact matter distributions in quadratic gravity, a candidate theory of quantum gravity. Thermal 2-2-holes, sourced by rela... |
1110.4694 | Marko Vojinovic | Aleksandar Mikovic, Marko Vojinovic | Poincare 2-group and quantum gravity | v3: published version | Class. Quant. Grav. 29, 165003 (2012) | 10.1088/0264-9381/29/16/165003 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that General Relativity can be formulated as a constrained
topological theory for flat 2-connections associated to the Poincar\'e 2-group.
Matter can be consistently coupled to gravity in this formulation. We also show
that the edge lengths of the spacetime manifold triangulation arise as the
basic variables ... | [
{
"created": "Fri, 21 Oct 2011 03:15:34 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Oct 2011 15:46:08 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Jan 2013 20:05:47 GMT",
"version": "v3"
}
] | 2013-01-15 | [
[
"Mikovic",
"Aleksandar",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We show that General Relativity can be formulated as a constrained topological theory for flat 2-connections associated to the Poincar\'e 2-group. Matter can be consistently coupled to gravity in this formulation. We also show that the edge lengths of the spacetime manifold triangulation arise as the basic variables in... |
1503.04589 | Julien Larena | Roberto A. Sussman and Julien Larena | Gravitational entropy of local cosmic voids | 24 pages, 6 figures. Replaced to match the published version | Class. Quantum Grav. 32 (2015) 165012 | 10.1088/0264-9381/32/16/165012 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We undertake a non-perturbative study of the evolution of the "gravitational
entropy" proposed by Clifton, Ellis and Tavakol (CET) on local expanding cosmic
CDM voids of $\sim 50-100$ Mpc size described as spherical under-dense regions
with negative spatial curvature, whose dynamics is determined by
Lemaitre-Tolman-B... | [
{
"created": "Mon, 16 Mar 2015 10:13:55 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Mar 2015 07:53:10 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Aug 2015 07:57:49 GMT",
"version": "v3"
}
] | 2015-08-26 | [
[
"Sussman",
"Roberto A.",
""
],
[
"Larena",
"Julien",
""
]
] | We undertake a non-perturbative study of the evolution of the "gravitational entropy" proposed by Clifton, Ellis and Tavakol (CET) on local expanding cosmic CDM voids of $\sim 50-100$ Mpc size described as spherical under-dense regions with negative spatial curvature, whose dynamics is determined by Lemaitre-Tolman-Bon... |
1302.5249 | Andrea Maselli | Andrea Maselli, Leonardo Gualtieri, Francesco Pannarale, Valeria
Ferrari | MG13 proceedings: On the validity of the adiabatic approximation in
compact binary inspirals | 3 pages, no figure, Prepared for proceedings of the international
conference "Thirteenth Marcel Grossmann Meeting" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the post-Newtonian-Affine model to assess the validity of the
adiabatic approximation in modeling tidal effects in the phase evolution of
compact binary systems. We compute the dynamical evolution of the tidal tensor,
which we estimate at the 2 PN order, and of the quadrupole tensor, finding that
their ratio, ... | [
{
"created": "Thu, 21 Feb 2013 11:04:55 GMT",
"version": "v1"
}
] | 2013-02-22 | [
[
"Maselli",
"Andrea",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Pannarale",
"Francesco",
""
],
[
"Ferrari",
"Valeria",
""
]
] | We use the post-Newtonian-Affine model to assess the validity of the adiabatic approximation in modeling tidal effects in the phase evolution of compact binary systems. We compute the dynamical evolution of the tidal tensor, which we estimate at the 2 PN order, and of the quadrupole tensor, finding that their ratio, i.... |
gr-qc/0604023 | Jairzinho Ramos | Jairzinho Ramos and Robert Gilmore | Derivation of Source-Free Maxwell and Gravitational Radiation Equations
by Group Theoretical Methods | 15 pages, no figures, to appear in Int. J. Mod. Phys. D | Int.J.Mod.Phys. D15 (2006) 505-520 | 10.1142/S021827180600822X | null | gr-qc | null | We derive source-free Maxwell-like equations in flat spacetime for any
helicity "j" by comparing the transformation properties of the 2(2j+1) states
that carry the manifestly covariant representations of the inhomogeneous
Lorentz group with the transformation properties of the two helicity "j" states
that carry the i... | [
{
"created": "Wed, 5 Apr 2006 21:17:17 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ramos",
"Jairzinho",
""
],
[
"Gilmore",
"Robert",
""
]
] | We derive source-free Maxwell-like equations in flat spacetime for any helicity "j" by comparing the transformation properties of the 2(2j+1) states that carry the manifestly covariant representations of the inhomogeneous Lorentz group with the transformation properties of the two helicity "j" states that carry the irr... |
1508.00331 | Farruh Atamurotov | Ahmadjon Abdujabbarov, Farruh Atamurotov, Naresh Dadhich, Bobomurat
Ahmedov and Zden\v{e}k Stuchl\'ik | Energetics and optical properties of $6$-dimensional rotating black hole
in pure Gauss-Bonnet gravity | 10 pages, 8 figures | null | 10.1140/epjc/s10052-015-3604-5 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study physical processes around a rotating black hole in pure Gauss-Bonnet
(GB) gravity. In pure GB gravity, gravitational potential has slower fall off
as compared to the corresponding Einstein potential in the same dimension. It
is therefore expected that the energetics of pure GB black hole would be
weaker, and... | [
{
"created": "Mon, 3 Aug 2015 07:26:47 GMT",
"version": "v1"
}
] | 2015-09-30 | [
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Atamurotov",
"Farruh",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | We study physical processes around a rotating black hole in pure Gauss-Bonnet (GB) gravity. In pure GB gravity, gravitational potential has slower fall off as compared to the corresponding Einstein potential in the same dimension. It is therefore expected that the energetics of pure GB black hole would be weaker, and o... |
1511.02479 | Eduardo Rodrigues | Juliana Celestino, H. P. de Oliveira and E. L. Rodrigues | Nonlinear evolution of cylindrical gravitational waves: numerical method
and physical aspects | 11 pages, 8 figures | Phys. Rev. D 93, 104018 (2016) | 10.1103/PhysRevD.93.104018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General cylindrical waves are the simplest axisymmetrical gravitational waves
that contain both $+$ and $\times$ modes of polarization. In this paper, we
have studied the evolution of general cylindrical gravitational waves in the
realm of the characteristic scheme with a numerical code based on the
Galerkin-Collocat... | [
{
"created": "Sun, 8 Nov 2015 13:01:35 GMT",
"version": "v1"
}
] | 2016-05-18 | [
[
"Celestino",
"Juliana",
""
],
[
"de Oliveira",
"H. P.",
""
],
[
"Rodrigues",
"E. L.",
""
]
] | General cylindrical waves are the simplest axisymmetrical gravitational waves that contain both $+$ and $\times$ modes of polarization. In this paper, we have studied the evolution of general cylindrical gravitational waves in the realm of the characteristic scheme with a numerical code based on the Galerkin-Collocatio... |
1702.05366 | Esraa Elkhateeb | Esraa Elkhateeb | A Viable Dark Fluid Model | 16 pages and 5 figures | Astrophys Space Sci 363, 7 (2018) | 10.1007/s10509-017-3221-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We Consider a cosmological model based on a generalization of the equation of
state proposed by Nojiri and Odintsov [46] and \v{S}tefan\v{c}i'c [47], [48].
We argue that this model works as a dark fluid model which can interpolate
between dust equation of state and the dark energy equation of state. We show
how the a... | [
{
"created": "Thu, 16 Feb 2017 10:16:27 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2023 11:17:51 GMT",
"version": "v2"
}
] | 2023-02-17 | [
[
"Elkhateeb",
"Esraa",
""
]
] | We Consider a cosmological model based on a generalization of the equation of state proposed by Nojiri and Odintsov [46] and \v{S}tefan\v{c}i'c [47], [48]. We argue that this model works as a dark fluid model which can interpolate between dust equation of state and the dark energy equation of state. We show how the asy... |
2010.00875 | Damianos Iosifidis | Damianos Iosifidis | Non-Riemannian Cosmology: The role of Shear Hypermomentum | 14 pages, no figures | null | 10.1142/S0219887821501292 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the usual Einstein-Hilbert action in a Metric-Affine setup and in
the presence of a Perfect Hyperfluid. In order to decode the role of shear
hypermomentum, we impose vanishing spin and dilation parts on the sources and
allow only for non-vanishing shear. We then consider an FLRW background and
derive the ... | [
{
"created": "Fri, 2 Oct 2020 09:04:10 GMT",
"version": "v1"
}
] | 2021-08-04 | [
[
"Iosifidis",
"Damianos",
""
]
] | We consider the usual Einstein-Hilbert action in a Metric-Affine setup and in the presence of a Perfect Hyperfluid. In order to decode the role of shear hypermomentum, we impose vanishing spin and dilation parts on the sources and allow only for non-vanishing shear. We then consider an FLRW background and derive the ge... |
gr-qc/9711062 | Emre Sermutlu | Emre Sermutlu | Smarr's Formula for Black Holes in String Theory | 16 pages, LaTeX | null | null | UPR/777-T | gr-qc | null | We investigate thermodynamical properties of four and five dimensional black
hole solutions of toroidally compactified string theory. We derive an analog of
Smarr's formula and verify it directly using the metric.
| [
{
"created": "Thu, 20 Nov 1997 17:04:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sermutlu",
"Emre",
""
]
] | We investigate thermodynamical properties of four and five dimensional black hole solutions of toroidally compactified string theory. We derive an analog of Smarr's formula and verify it directly using the metric. |
gr-qc/0304059 | Graham Shore | Graham M Shore (University of Wales, Swansea) | Quantum Gravitational Optics | 28 pages, 5 figures. Review article commissioned by `Contemporary
Physics' | Contemp.Phys. 44 (2003) 503-521 | 10.1080/00107510310001617106 | SWAT 03-375 | gr-qc | null | In quantum theory, the curved spacetime of Einstein's general theory of
relativity acts as a dispersive optical medium for the propagation of light.
Gravitational rainbows and birefringence replace the classical picture of light
rays mapping out the null geodesics of curved spacetime. Even more remarkably,
{\it super... | [
{
"created": "Tue, 15 Apr 2003 20:20:10 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Shore",
"Graham M",
"",
"University of Wales, Swansea"
]
] | In quantum theory, the curved spacetime of Einstein's general theory of relativity acts as a dispersive optical medium for the propagation of light. Gravitational rainbows and birefringence replace the classical picture of light rays mapping out the null geodesics of curved spacetime. Even more remarkably, {\it superlu... |
1601.05609 | E M Howard Dr. | E. M. Howard | Causal Stability Conditions for General Relativistic Spacetimes | 7 pages, 2 figures, published in Journal of Physical Science and
Application 2 (7) (2012) 258-264 | Journal of Physical Science and Application 2 (7) (2012) 258-264 | null | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | A brief overview of some open questions in general relativity with important
consequences for causality theory is presented, aiming to a better
understanding of the causal structure of the spacetime. Special attention is
accorded to the problem of fundamental causal stability conditions. Several
questions are raised ... | [
{
"created": "Thu, 21 Jan 2016 12:38:38 GMT",
"version": "v1"
}
] | 2016-01-28 | [
[
"Howard",
"E. M.",
""
]
] | A brief overview of some open questions in general relativity with important consequences for causality theory is presented, aiming to a better understanding of the causal structure of the spacetime. Special attention is accorded to the problem of fundamental causal stability conditions. Several questions are raised an... |
2011.13955 | Justin Feng | Sumanta Chakraborty and Justin C. Feng | Perturbations of the almost Killing equation and their implications | 21 pages. Matches published version | Phys. Rev. D 103, 084020 (2021) | 10.1103/PhysRevD.103.084020 | Phys. Rev. D 103, 084020 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Killing vectors play a crucial role in characterizing the symmetries of a
given spacetime. However, realistic astrophysical systems are in most cases
only approximately symmetric. Even in the case of an astrophysical black hole,
one might expect Killing symmetries to exist only in an approximate sense due
to perturba... | [
{
"created": "Fri, 27 Nov 2020 19:02:16 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Apr 2021 15:03:33 GMT",
"version": "v2"
}
] | 2021-04-21 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"Feng",
"Justin C.",
""
]
] | Killing vectors play a crucial role in characterizing the symmetries of a given spacetime. However, realistic astrophysical systems are in most cases only approximately symmetric. Even in the case of an astrophysical black hole, one might expect Killing symmetries to exist only in an approximate sense due to perturbati... |
gr-qc/0309090 | Karlucio Castello-Branco | K. H. C. Castello-Branco and E. Abdalla | Analytic determination of the asymptotic quasi-normal mode spectrum of
small Schwarzschild-de Sitter black holes | revtex4, 10 pages, 1 figure, substantial changes, references added | null | null | null | gr-qc hep-th | null | Following the monodromy technique performed by Motl and Neitzke, we consider
the analytic determination of the highly damped (asymptotic) quasi-normal modes
of small Schwarzschild-de Sitter (SdS) black holes. We comment the result as
compared to the recent numerical data of Konoplya and Zhidenko.
| [
{
"created": "Thu, 18 Sep 2003 21:33:29 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Mar 2004 17:29:24 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Castello-Branco",
"K. H. C.",
""
],
[
"Abdalla",
"E.",
""
]
] | Following the monodromy technique performed by Motl and Neitzke, we consider the analytic determination of the highly damped (asymptotic) quasi-normal modes of small Schwarzschild-de Sitter (SdS) black holes. We comment the result as compared to the recent numerical data of Konoplya and Zhidenko. |
gr-qc/9806075 | Haret Rosu | H.C. Rosu | Ermakov approach for empty FRW minisuperspace oscillators | 3 pages, twocolumn style | null | null | null | gr-qc | null | The formal Ermakov approach for empty FRW minisuperspace cosmological models
of arbitrary Hartle-Hawking factor ordering and the corresponding squeezing
features are briefly discussed as a possible means of describing cosmological
evolution
| [
{
"created": "Thu, 18 Jun 1998 15:38:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rosu",
"H. C.",
""
]
] | The formal Ermakov approach for empty FRW minisuperspace cosmological models of arbitrary Hartle-Hawking factor ordering and the corresponding squeezing features are briefly discussed as a possible means of describing cosmological evolution |
gr-qc/0303078 | Hing Tong Cho | Hing Tong Cho | Dirac Quasi-Normal Modes in Schwarzschild Black Hole Spacetimes | 22 pages in Revtex4 style, 7 figures (eps files) | Phys.Rev. D68 (2003) 024003 | null | null | gr-qc hep-th | null | We evaluate both the massless and the massive Dirac quasi-normal mode
frequencies in the Schwarzschild black hole spacetime using the WKB
approximation. For the massless case, we find that, similar to those for the
integral spin fields, the real parts of the frequencies increase with the
angular momentum number $\kap... | [
{
"created": "Thu, 20 Mar 2003 06:19:44 GMT",
"version": "v1"
}
] | 2009-09-29 | [
[
"Cho",
"Hing Tong",
""
]
] | We evaluate both the massless and the massive Dirac quasi-normal mode frequencies in the Schwarzschild black hole spacetime using the WKB approximation. For the massless case, we find that, similar to those for the integral spin fields, the real parts of the frequencies increase with the angular momentum number $\kappa... |
gr-qc/9910079 | Carlo Rovelli | Marcus Gaul, Carlo Rovelli | Loop Quantum Gravity and the Meaning of Diffeomorphism Invariance | Lectures given at the 35th Karpacz Winter School on Theoretical
Physics: From Cosmology to Quantum Gravity. 52 pages. 17 eps figures | Lect.Notes Phys. 541 (2000) 277-324 | null | MPI-PhT-99/46 | gr-qc hep-ph hep-th | null | This series of lectures gives a simple and self-contained introduction to the
non-perturbative and background independent loop approach of canonical quantum
gravity. The Hilbert space of kinematical quantum states is constructed and a
complete basis of spin network states is introduced. An application of the
formalis... | [
{
"created": "Sat, 23 Oct 1999 02:18:10 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Dec 1999 17:37:35 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Gaul",
"Marcus",
""
],
[
"Rovelli",
"Carlo",
""
]
] | This series of lectures gives a simple and self-contained introduction to the non-perturbative and background independent loop approach of canonical quantum gravity. The Hilbert space of kinematical quantum states is constructed and a complete basis of spin network states is introduced. An application of the formalism ... |
2212.03789 | Qing Gao | Qing Gao, Yujie You, Yungui Gong, Chao Zhang and Chunyu Zhang | Testing alternative theories of gravity with space-based gravitational
wave detectors | 21 pages, 3 figures, 4 tables. Typos corrected and references
updated. Published in PRD | Phys. Rev. D 108 (2023) 024027 | 10.1103/PhysRevD.108.024027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use gravitational waves (GWs) from binary black holes (BBHs) and neutron
stars inspiraling into intermediate-mass black holes to evaluate how accurately
the future space-based GW detectors such as LISA, Taiji and TianQin and their
combined networks can determine source parameters and constrain alternative
theories... | [
{
"created": "Wed, 7 Dec 2022 17:12:38 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jul 2023 09:29:29 GMT",
"version": "v2"
}
] | 2023-07-19 | [
[
"Gao",
"Qing",
""
],
[
"You",
"Yujie",
""
],
[
"Gong",
"Yungui",
""
],
[
"Zhang",
"Chao",
""
],
[
"Zhang",
"Chunyu",
""
]
] | We use gravitational waves (GWs) from binary black holes (BBHs) and neutron stars inspiraling into intermediate-mass black holes to evaluate how accurately the future space-based GW detectors such as LISA, Taiji and TianQin and their combined networks can determine source parameters and constrain alternative theories o... |
gr-qc/0510113 | David Burton | M. Epstein, D.A. Burton and R.W. Tucker | Relativistic Anelasticity | 29 pages | Class.Quant.Grav.23:3545-3571,2006 | 10.1088/0264-9381/23/10/020 | null | gr-qc | null | A formulation of Continuum Mechanics within the context of General Relativity
is presented that allows for the incorporation of certain types of anelastic
material behaviour, such as viscoelasticity and plasticity. The approach is
based on the concept of a four-dimensional body-time complex structured as a
principal ... | [
{
"created": "Wed, 26 Oct 2005 10:01:01 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Oct 2005 16:30:22 GMT",
"version": "v2"
}
] | 2010-11-05 | [
[
"Epstein",
"M.",
""
],
[
"Burton",
"D. A.",
""
],
[
"Tucker",
"R. W.",
""
]
] | A formulation of Continuum Mechanics within the context of General Relativity is presented that allows for the incorporation of certain types of anelastic material behaviour, such as viscoelasticity and plasticity. The approach is based on the concept of a four-dimensional body-time complex structured as a principal bu... |
1411.2909 | Harold Erbin | Harold Erbin | Deciphering and generalizing Demianski-Janis-Newman algorithm | 14 pp. (+ 4 app.); v2: modifications to improve clarity, match
published version, available at Springer via
http://dx.doi.org/10.1007/s10714-016-2054-1 | Gen.Rel.Grav. 48:5 (2016) | 10.1007/s10714-016-2054-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the case of vanishing cosmological constant, Demia\'nski has shown that
the Janis-Newman algorithm can be generalized in order to include a NUT charge
and another parameter $c$, in addition to the angular momentum. Moreover it was
proved that only a NUT charge can be added for non-vanishing cosmological
constant. ... | [
{
"created": "Tue, 11 Nov 2014 18:20:17 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Apr 2016 06:19:30 GMT",
"version": "v2"
}
] | 2016-04-18 | [
[
"Erbin",
"Harold",
""
]
] | In the case of vanishing cosmological constant, Demia\'nski has shown that the Janis-Newman algorithm can be generalized in order to include a NUT charge and another parameter $c$, in addition to the angular momentum. Moreover it was proved that only a NUT charge can be added for non-vanishing cosmological constant. Ho... |
2112.08174 | Hing Tong Cho | H. T. Cho and B. L. Hu | Quantum Noise of Gravitons and Stochastic Force on Geodesic Separation | 43 pages | Phys. Rev. D105, 086004 (2022) | 10.1103/PhysRevD.105.086004 | null | gr-qc astro-ph.CO hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | In this work we consider the effects of gravitons and their fluctuations on
the dynamics of two masses using the Feynman-Vernon influence functional
formalism, applied to nonequilibrium quantum field theory and semiclassical
stochastic gravity earlier by Calzetta, Hu and Verdaguer [1-3], and most
recently, to this pr... | [
{
"created": "Wed, 15 Dec 2021 14:52:44 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Apr 2022 03:40:25 GMT",
"version": "v2"
}
] | 2023-01-10 | [
[
"Cho",
"H. T.",
""
],
[
"Hu",
"B. L.",
""
]
] | In this work we consider the effects of gravitons and their fluctuations on the dynamics of two masses using the Feynman-Vernon influence functional formalism, applied to nonequilibrium quantum field theory and semiclassical stochastic gravity earlier by Calzetta, Hu and Verdaguer [1-3], and most recently, to this prob... |
0710.4696 | Jose Natario | Filipe C. Mena, Jose Natario, Paul Tod | Avoiding closed timelike curves with a collapsing rotating null dust
shell | 6 pages; v2: references added; v3: remark added for final published
version | Class.Quant.Grav.25:045016,2008 | 10.1088/0264-9381/25/4/045016 | null | gr-qc | null | We present an idealised model of gravitational collapse, describing a
collapsing rotating cylindrical shell of null dust in flat space, with the
metric of a spinning cosmic string as the exterior. We find that the shell
bounces before closed timelike curves can be formed. Our results also suggest
slightly different d... | [
{
"created": "Thu, 25 Oct 2007 09:16:17 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Oct 2007 11:20:15 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Feb 2008 14:01:47 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Mena",
"Filipe C.",
""
],
[
"Natario",
"Jose",
""
],
[
"Tod",
"Paul",
""
]
] | We present an idealised model of gravitational collapse, describing a collapsing rotating cylindrical shell of null dust in flat space, with the metric of a spinning cosmic string as the exterior. We find that the shell bounces before closed timelike curves can be formed. Our results also suggest slightly different def... |
gr-qc/0202034 | Jacob D. Bekenstein | Jacob D. Bekenstein and Gilad Gour (Hebrew University) | Building blocks of a black hole | PhysRevTeX, 14 pages | Phys.Rev. D66 (2002) 024005 | 10.1103/PhysRevD.66.024005 | null | gr-qc astro-ph hep-th quant-ph | null | What is the nature of the energy spectrum of a black hole ? The algebraic
approach to black hole quantization requires the horizon area eigenvalues to be
equally spaced. As stressed long ago by by Mukhanov, such eigenvalues must be
exponentially degenerate with respect to the area quantum number if one is to
understa... | [
{
"created": "Mon, 11 Feb 2002 06:41:11 GMT",
"version": "v1"
},
{
"created": "Thu, 2 May 2002 15:00:46 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Bekenstein",
"Jacob D.",
"",
"Hebrew University"
],
[
"Gour",
"Gilad",
"",
"Hebrew University"
]
] | What is the nature of the energy spectrum of a black hole ? The algebraic approach to black hole quantization requires the horizon area eigenvalues to be equally spaced. As stressed long ago by by Mukhanov, such eigenvalues must be exponentially degenerate with respect to the area quantum number if one is to understand... |
1004.2276 | Abhay Shah | Tobias S. Keidl, Abhay G. Shah, John L. Friedman, Dong-Hoon Kim, and
Larry R. Price | Gravitational Self-force in a Radiation Gauge | 38 pages, 3 Tables. Changes for publication. Accepted to PRD | Phys.Rev.D82:124012,2010 | 10.1103/PhysRevD.82.124012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this, the first of two companion papers, we present a method for finding
the gravitational self-force in a modified radiation gauge for a particle
moving on a geodesic in a Schwarzschild or Kerr spacetime. An extension of an
earlier result by Wald is used to show the spin-weight $\pm 2$ perturbed Weyl
scalar ($\ps... | [
{
"created": "Tue, 13 Apr 2010 21:52:54 GMT",
"version": "v1"
},
{
"created": "Tue, 4 May 2010 22:07:30 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Oct 2010 02:37:33 GMT",
"version": "v3"
},
{
"created": "Wed, 22 Oct 2014 13:50:02 GMT",
"version": "v4"
}
] | 2014-10-23 | [
[
"Keidl",
"Tobias S.",
""
],
[
"Shah",
"Abhay G.",
""
],
[
"Friedman",
"John L.",
""
],
[
"Kim",
"Dong-Hoon",
""
],
[
"Price",
"Larry R.",
""
]
] | In this, the first of two companion papers, we present a method for finding the gravitational self-force in a modified radiation gauge for a particle moving on a geodesic in a Schwarzschild or Kerr spacetime. An extension of an earlier result by Wald is used to show the spin-weight $\pm 2$ perturbed Weyl scalar ($\psi_... |
2108.04864 | Jeferson De Oliveira | B. Cuadros-Melgar, R. D. B. Fontana and Jeferson de Oliveira | Superradiance and instabilities in black holes surrounded by anisotropic
fluids | 26 pages, 2 figures | Physical Review D 104 104039 (2021) | 10.1103/PhysRevD.104.104039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we analyze the propagation of a charged scalar field in a
Reissner-Nordstr\"om black hole endowed with one anisotropic fluid that can
play the role of a cosmological term for certain set of parameters. The
evolution of a scalar wave scattering is examined giving rise to the same
superradiant scattering ... | [
{
"created": "Tue, 10 Aug 2021 18:32:46 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Dec 2021 12:42:05 GMT",
"version": "v2"
}
] | 2021-12-02 | [
[
"Cuadros-Melgar",
"B.",
""
],
[
"Fontana",
"R. D. B.",
""
],
[
"de Oliveira",
"Jeferson",
""
]
] | In this paper we analyze the propagation of a charged scalar field in a Reissner-Nordstr\"om black hole endowed with one anisotropic fluid that can play the role of a cosmological term for certain set of parameters. The evolution of a scalar wave scattering is examined giving rise to the same superradiant scattering co... |
gr-qc/0306121 | Sujit Chatterjee | S.Chatterjee and A.Banerjee | C-field cosmological model in higher dimensions | 9 pages, latex | Gen.Rel.Grav. 36 (2004) 303-313 | 10.1023/B:GERG.0000010477.10127.3f | null | gr-qc | null | Hoyle and Narlikar's $C$-field cosmology is extended in the framework of
higher dimensional spacetime and a class of exact solutions is obtained.
Adjusting the arbitrary constants of integration one can show that our model is
amenable to the desirable property of dimensional reduction so that the
universe ends up in ... | [
{
"created": "Fri, 27 Jun 2003 08:45:30 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Chatterjee",
"S.",
""
],
[
"Banerjee",
"A.",
""
]
] | Hoyle and Narlikar's $C$-field cosmology is extended in the framework of higher dimensional spacetime and a class of exact solutions is obtained. Adjusting the arbitrary constants of integration one can show that our model is amenable to the desirable property of dimensional reduction so that the universe ends up in an... |
gr-qc/0403041 | Andr\'as L\'aszl\'o | Andr\'as L\'aszl\'o | Mathematical Clarification of General Relativistic Variational
Principles | 17 pages | null | null | null | gr-qc | null | In this paper a mathematically precise global (i.e. not the usual local)
approach is presented to the variational principles of general relativistic
classical field theories.
Problems of the classic (usual) approaches are also discussed in comparison.
The aim of developing a global approach is to provide a possib... | [
{
"created": "Wed, 10 Mar 2004 15:05:30 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Mar 2004 18:41:40 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Sep 2004 16:47:38 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"László",
"András",
""
]
] | In this paper a mathematically precise global (i.e. not the usual local) approach is presented to the variational principles of general relativistic classical field theories. Problems of the classic (usual) approaches are also discussed in comparison. The aim of developing a global approach is to provide a possible too... |
1609.00083 | Gaurav Khanna | Gaurav Khanna, Richard H. Price | Black Hole Ringing, Quasinormal Modes, and Light Rings | 6 pages, 7 figures; to appear in PRD (rapid comm.) | Phys. Rev. D 95, 081501 (2017) | 10.1103/PhysRevD.95.081501 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modelling of gravitational waves from binary black hole inspiral has played
an important role in the recent observations of such signals. The late-stage
ringdown phase of the gravitational waveform is often associated with the null
particle orbit ("light ring") of the black hole spacetime. With simple models
we show ... | [
{
"created": "Thu, 1 Sep 2016 01:39:55 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Sep 2016 20:25:43 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Apr 2017 11:57:59 GMT",
"version": "v3"
}
] | 2017-05-03 | [
[
"Khanna",
"Gaurav",
""
],
[
"Price",
"Richard H.",
""
]
] | Modelling of gravitational waves from binary black hole inspiral has played an important role in the recent observations of such signals. The late-stage ringdown phase of the gravitational waveform is often associated with the null particle orbit ("light ring") of the black hole spacetime. With simple models we show th... |
1107.1575 | Mark J. Hadley | Mark J Hadley | The asymmetric Kerr metric as a source of CP violation | 4 pages | Europhys.Lett.95:21003,2011 | 10.1209/0295-5075/95/21003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All experimental evidence for violation of discrete spacetime symmetries:
Parity and Time reversal and the related Charge conjugation/Parity combination
(P, T and CP respectively) has been obtained on earth in a gravitational
potential that is P and T anisotropic. It is suggested that the origin of the
observed CP vi... | [
{
"created": "Fri, 8 Jul 2011 08:25:08 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Hadley",
"Mark J",
""
]
] | All experimental evidence for violation of discrete spacetime symmetries: Parity and Time reversal and the related Charge conjugation/Parity combination (P, T and CP respectively) has been obtained on earth in a gravitational potential that is P and T anisotropic. It is suggested that the origin of the observed CP viol... |
2304.01993 | Leonardo Giuliano Trombetta | Francisco D. Mazzitelli and Leonardo G. Trombetta | Constraining a stochastic variation of the gravitational coupling with
binary systems | 24 pages, 2 figures | Phys. Rev. D 107, 124038 (2023) | 10.1103/PhysRevD.107.124038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the effect of stochastic fluctuations of the gravitational
coupling G on the evolution of binary systems. We work at an elementary level,
in the Newtonian limit, and focusing mainly on laser ranging. We show that, due
to cumulative effects, observational data may be used to put bounds on the
stochastic fl... | [
{
"created": "Tue, 4 Apr 2023 17:51:29 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jun 2023 17:11:24 GMT",
"version": "v2"
}
] | 2023-06-19 | [
[
"Mazzitelli",
"Francisco D.",
""
],
[
"Trombetta",
"Leonardo G.",
""
]
] | We consider the effect of stochastic fluctuations of the gravitational coupling G on the evolution of binary systems. We work at an elementary level, in the Newtonian limit, and focusing mainly on laser ranging. We show that, due to cumulative effects, observational data may be used to put bounds on the stochastic fluc... |
1106.6096 | Kiyoshi Shiraishi | Takuya Maki (Japan Women's College of Physical Education), Nahomi Kan
(Yamaguchi Junior College), Kiyoshi Shiraishi (Yamaguchi University) | Dirac-Born-Infeld-Einstein theory with Weyl invariance | 11pages, note added, references added | Journal of Modern Physics, Vol. 3 No. 9, 2012, pp. 1081-1087 | 10.4236/jmp.2012.39142 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Weyl invariant gravity has been investigated as the fundamental theory of the
vector inflation. Accordingly, we consider a Weyl invariant extension of
Dirac-Born-Infeld type gravity. We find that an appropriate choice of the
metric removes the scalar degree of freedom which is at the first sight
required by the local... | [
{
"created": "Thu, 30 Jun 2011 01:30:08 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Jul 2011 05:03:09 GMT",
"version": "v2"
}
] | 2012-10-02 | [
[
"Maki",
"Takuya",
"",
"Japan Women's College of Physical Education"
],
[
"Kan",
"Nahomi",
"",
"Yamaguchi Junior College"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | Weyl invariant gravity has been investigated as the fundamental theory of the vector inflation. Accordingly, we consider a Weyl invariant extension of Dirac-Born-Infeld type gravity. We find that an appropriate choice of the metric removes the scalar degree of freedom which is at the first sight required by the local s... |
gr-qc/9807060 | Shinsuke Kawai | Shinsuke Kawai and Jiro Soda | Nonsingular Bianchi type I cosmological solutions from 1-loop
superstring effective action | One section and one figure added, to be published in Phys. Rev. D | Phys.Rev. D59 (1999) 063506 | 10.1103/PhysRevD.59.063506 | KUCP119 | gr-qc hep-th | null | Non-singular Bianchi type I solutions are found from the effective action
with a superstring-motivated Gauss-Bonnet term. These anisotropic non-singular
solutions evolve from the asymptotic Minkowski region, subsequently
super-inflate, and then smoothly continue either to Kasner-type (expanding in
two directions and ... | [
{
"created": "Wed, 22 Jul 1998 12:42:47 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jan 1999 16:10:16 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kawai",
"Shinsuke",
""
],
[
"Soda",
"Jiro",
""
]
] | Non-singular Bianchi type I solutions are found from the effective action with a superstring-motivated Gauss-Bonnet term. These anisotropic non-singular solutions evolve from the asymptotic Minkowski region, subsequently super-inflate, and then smoothly continue either to Kasner-type (expanding in two directions and sh... |
2309.13656 | Jose Barrientos | Jos\'e Barrientos, Adolfo Cisterna, Konstantinos Pallikaris | Pleban\'ski-Demia\'nski \`a la Ehlers-Harrison: Exact Rotating and
Accelerating Type I Black Holes | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Recently, it was shown that type D black holes, encompassed in the large
Pleban\'ski--Demia\'nski (PD) family, exhibit a wide class of algebraically
general generalizations via the application of Ehlers and Harrison
transformations. In this work, we first discuss some mathematical details
behind the composition of su... | [
{
"created": "Sun, 24 Sep 2023 14:50:07 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2024 15:26:03 GMT",
"version": "v2"
}
] | 2024-01-24 | [
[
"Barrientos",
"José",
""
],
[
"Cisterna",
"Adolfo",
""
],
[
"Pallikaris",
"Konstantinos",
""
]
] | Recently, it was shown that type D black holes, encompassed in the large Pleban\'ski--Demia\'nski (PD) family, exhibit a wide class of algebraically general generalizations via the application of Ehlers and Harrison transformations. In this work, we first discuss some mathematical details behind the composition of such... |
1806.05441 | Ramil Izmailov N | R.F. Lukmanova, G.Y. Tuleganova, R.N. Izmailov, and K.K. Nandi | Lensing observables: Massless dyonic vis-\`a-vis Ellis wormhole | 16 pages, 7 figures | Phys. Rev. D 97, 124027 (2018) | 10.1103/PhysRevD.97.124027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stable massless wormholes are theoretically interesting in their own right as
well as for astrophysical applications, especially as galactic halo objects.
Therefore, the study of gravitational lensing observables for such objects is
of importance, and we do here by applying the parametric post-Newtonian method
of Kee... | [
{
"created": "Thu, 14 Jun 2018 10:00:57 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Nov 2023 09:46:37 GMT",
"version": "v2"
}
] | 2023-11-17 | [
[
"Lukmanova",
"R. F.",
""
],
[
"Tuleganova",
"G. Y.",
""
],
[
"Izmailov",
"R. N.",
""
],
[
"Nandi",
"K. K.",
""
]
] | Stable massless wormholes are theoretically interesting in their own right as well as for astrophysical applications, especially as galactic halo objects. Therefore, the study of gravitational lensing observables for such objects is of importance, and we do here by applying the parametric post-Newtonian method of Keeto... |
gr-qc/0103102 | Alan D. Rendall | Alan D. Rendall and Marsha Weaver | Manufacture of Gowdy spacetimes with spikes | 25 pages | Class.Quant.Grav. 18 (2001) 2959-2976 | 10.1088/0264-9381/18/15/310 | AEI-2001-037 | gr-qc | null | In numerical studies of Gowdy spacetimes evidence has been found for the
development of localized features (spikes) involving large gradients near the
singularity. The rigorous mathematical results available up to now did not
cover this kind of situation. In this work we show the existence of large
classes of Gowdy s... | [
{
"created": "Wed, 28 Mar 2001 14:08:13 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Rendall",
"Alan D.",
""
],
[
"Weaver",
"Marsha",
""
]
] | In numerical studies of Gowdy spacetimes evidence has been found for the development of localized features (spikes) involving large gradients near the singularity. The rigorous mathematical results available up to now did not cover this kind of situation. In this work we show the existence of large classes of Gowdy spa... |
2210.16397 | Paul R. Anderson | Paul R. Anderson, Shohreh Gholizadeh Siahmazgi, and Zachary P.
Scofield | Infrared Effects and the Unruh State | Background material added, minor changes and corrections, published
version with minor misprints corrected and a few other minor changes
including information added to footnote 1, 28 pages, 2 figures | 2023 Class. Quantum Grav. 40 135004 | 10.1088/1361-6382/acd0fd | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detailed behaviors of the modes of quantized scalar fields in the Unruh state
for various eternal black holes in two dimensions are investigated. It is shown
that the late-time behaviors of some of the modes of the quantum fields and of
the symmetric two-point function are determined by infrared effects. The nature
o... | [
{
"created": "Fri, 28 Oct 2022 20:38:25 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Nov 2022 21:36:28 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Jun 2023 16:48:39 GMT",
"version": "v3"
}
] | 2023-06-08 | [
[
"Anderson",
"Paul R.",
""
],
[
"Siahmazgi",
"Shohreh Gholizadeh",
""
],
[
"Scofield",
"Zachary P.",
""
]
] | Detailed behaviors of the modes of quantized scalar fields in the Unruh state for various eternal black holes in two dimensions are investigated. It is shown that the late-time behaviors of some of the modes of the quantum fields and of the symmetric two-point function are determined by infrared effects. The nature of ... |
1110.3187 | Tomislav Prokopec | Tomislav Prokopec | Symmetry breaking and the Goldstone theorem in de Sitter space | 22 pages, 2 figures, published version | JCAP 1212 (2012) 023 | 10.1088/1475-7516/2012/12/023 | ITP-UU-11/38, SPIN-11/29 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an O(N) symmetric scalar field model in the mean field (Hartree)
approximation and show that the symmetry can be broken in de Sitter space. We
find that the phase transition can be of first order, and that its strength
depends non-analytically on the parameters of the model. We also show that the
would-be... | [
{
"created": "Fri, 14 Oct 2011 12:30:01 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Apr 2013 17:19:19 GMT",
"version": "v2"
}
] | 2013-04-02 | [
[
"Prokopec",
"Tomislav",
""
]
] | We consider an O(N) symmetric scalar field model in the mean field (Hartree) approximation and show that the symmetry can be broken in de Sitter space. We find that the phase transition can be of first order, and that its strength depends non-analytically on the parameters of the model. We also show that the would-be G... |
gr-qc/9905097 | Vitaly Vanchurin | Vitaly Vanchurin, Alexander Vilenkin, Serge Winitzki | Predictability crisis in inflationary cosmology and its resolution | 23 pages, 13 figures | Phys.Rev.D61:083507,2000 | 10.1103/PhysRevD.61.083507 | null | gr-qc astro-ph hep-ph hep-th | null | Models of inflationary cosmology can lead to variation of observable
parameters ("constants of Nature") on extremely large scales. The question of
making probabilistic predictions for today's observables in such models has
been investigated in the literature. Because of the infinite thermalized volume
resulting from ... | [
{
"created": "Tue, 25 May 1999 21:43:38 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Sep 1999 19:08:46 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Vanchurin",
"Vitaly",
""
],
[
"Vilenkin",
"Alexander",
""
],
[
"Winitzki",
"Serge",
""
]
] | Models of inflationary cosmology can lead to variation of observable parameters ("constants of Nature") on extremely large scales. The question of making probabilistic predictions for today's observables in such models has been investigated in the literature. Because of the infinite thermalized volume resulting from et... |
2010.12984 | Thomas Osburn | Justin Y. J. Burton and Thomas Osburn | Reissner-Nordstr\"om perturbation framework with gravitational wave
applications | Accepted for publication by Physical Review D | null | 10.1103/PhysRevD.102.104030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new convenient framework for modeling Reissner-Nordstr\"om black
hole perturbations from charged distributions of matter. Using this framework,
we quantify how gravitational wave observations of compact binary systems would
be affected if one or both components were charged. Our approach streamlines
the ... | [
{
"created": "Sat, 24 Oct 2020 20:56:30 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Burton",
"Justin Y. J.",
""
],
[
"Osburn",
"Thomas",
""
]
] | We present a new convenient framework for modeling Reissner-Nordstr\"om black hole perturbations from charged distributions of matter. Using this framework, we quantify how gravitational wave observations of compact binary systems would be affected if one or both components were charged. Our approach streamlines the (l... |
1102.4468 | Edmundo M. Monte | Edmundo M. Monte | Topological and Geometrical Properties of Brane-Worlds | 9 pages, accepted for publication in Int. J. Geom. Metho. Mod. Phys | null | 10.1142/S0219887811005580 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometrical and topological properties of the bulk (environment
space) when we modify the geometry or topology of a brane-world. Through the
characterization of a spherically symmetric space-time as a local brane-world
immersed into six dimensional pseudo-Euclidean spaces, with different
signatures of th... | [
{
"created": "Tue, 22 Feb 2011 11:30:16 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Aug 2011 12:37:43 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Aug 2011 12:45:05 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Monte",
"Edmundo M.",
""
]
] | We study the geometrical and topological properties of the bulk (environment space) when we modify the geometry or topology of a brane-world. Through the characterization of a spherically symmetric space-time as a local brane-world immersed into six dimensional pseudo-Euclidean spaces, with different signatures of the ... |
2107.14750 | Anna Heffernan | Anna Heffernan | Regularization of a scalar charged particle for generic orbits in Kerr
spacetime | 25 pages, updated with published version, accepted by Phys. Rev. D on
July 7, 2022, published Sept 15, 2022 | Phys. Rev. D 106, 064031 (2022) | 10.1103/PhysRevD.106.064031 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A scalar charged particle moving in a curved background spacetime will emit a
field affecting its own motion; the resolving of this resulting motion is often
referred to as the self-force problem. This also serves as a toy model for the
astrophysically interesting compact body binaries, extreme mass ratio
inspirals, ... | [
{
"created": "Fri, 30 Jul 2021 16:48:09 GMT",
"version": "v1"
},
{
"created": "Wed, 18 May 2022 15:29:41 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Sep 2022 18:26:15 GMT",
"version": "v3"
}
] | 2022-09-28 | [
[
"Heffernan",
"Anna",
""
]
] | A scalar charged particle moving in a curved background spacetime will emit a field affecting its own motion; the resolving of this resulting motion is often referred to as the self-force problem. This also serves as a toy model for the astrophysically interesting compact body binaries, extreme mass ratio inspirals, ta... |
gr-qc/0011112 | Don Marolf | Donald Marolf | Group Averaging and Refined Algebraic Quantization: Where are we now? | 10 pages, for the proceedings of the 9th Marcel Grossmann Conference,
Rome 2000 | null | null | SU-GP/11-2 | gr-qc | null | Refined Algebraic Quantization and Group Averaging are powerful methods for
quantizing constrained systems. They give constructive algorithms for
generating observables and the physical inner product. This work outlines the
current status of these ideas with an eye toward quantum gravity. The main goal
is provide a d... | [
{
"created": "Thu, 30 Nov 2000 00:02:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Marolf",
"Donald",
""
]
] | Refined Algebraic Quantization and Group Averaging are powerful methods for quantizing constrained systems. They give constructive algorithms for generating observables and the physical inner product. This work outlines the current status of these ideas with an eye toward quantum gravity. The main goal is provide a des... |
2109.00358 | Sunil Maurya DR. | S. K. Maurya, Ksh. Newton Singh, M. Govender, Sudan Hansraj | Gravitationally decoupled strange star model beyond standard maximum
mass limit in Einstein-Gauss-Bonnet gravity | 16 pages, and 12 figures | null | 10.3847/1538-4357/ac4255 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The recent theoretical advance known as the Minimal Geometric Deformation
(MGD) method has initiated a renewed interest in investigating higher curvature
gravitational effects in relativistic astrophysics. In this work, we model a
strange star within the context of Einstein-Gauss-Bonnet gravity with the help
of the M... | [
{
"created": "Tue, 31 Aug 2021 10:07:14 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Sep 2021 05:53:09 GMT",
"version": "v2"
}
] | 2022-02-16 | [
[
"Maurya",
"S. K.",
""
],
[
"Singh",
"Ksh. Newton",
""
],
[
"Govender",
"M.",
""
],
[
"Hansraj",
"Sudan",
""
]
] | The recent theoretical advance known as the Minimal Geometric Deformation (MGD) method has initiated a renewed interest in investigating higher curvature gravitational effects in relativistic astrophysics. In this work, we model a strange star within the context of Einstein-Gauss-Bonnet gravity with the help of the MGD... |
gr-qc/9403009 | Jemal Guven | Jemal Guven | The isolation of gravitational instantons: Flat tori V flat R^4 | 15 pages, ICN-UNAM 94-10 | Phys.Rev. D49 (1994) 5126-5130 | 10.1103/PhysRevD.49.5126 | null | gr-qc | null | The role of topology in the perturbative solution of the Euclidean Einstein
equations about flat instantons is examined.
| [
{
"created": "Wed, 2 Mar 1994 18:28:18 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Guven",
"Jemal",
""
]
] | The role of topology in the perturbative solution of the Euclidean Einstein equations about flat instantons is examined. |
2003.03579 | Iber\^e Kuntz | Roberto Casadio, Iber\^e Kuntz | Bootstrapped Newtonian quantum gravity | LaTeX, 13 pages, no figures | null | 10.1140/epjc/s10052-020-8146-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute quantum corrections for the gravitational potential obtained by
including a derivative self-coupling in its classical dynamics as a toy model
for analysing quantum gravity in the strong field regime. In particular, we
focus on quantum corrections to the classical solutions in the vacuum outside
localised m... | [
{
"created": "Sat, 7 Mar 2020 13:51:30 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2020 13:07:36 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Jun 2020 15:20:10 GMT",
"version": "v3"
}
] | 2020-07-15 | [
[
"Casadio",
"Roberto",
""
],
[
"Kuntz",
"Iberê",
""
]
] | We compute quantum corrections for the gravitational potential obtained by including a derivative self-coupling in its classical dynamics as a toy model for analysing quantum gravity in the strong field regime. In particular, we focus on quantum corrections to the classical solutions in the vacuum outside localised mat... |
gr-qc/9711038 | Ivan S. N. Booth | I. S. N. Booth, R. B. Mann | Cosmological Pair Creation of Charged and Rotating Black Holes | 8 pages, Latex, 4 figures; to appear in the proceedings of the
Seventh Canadian Conference on General Relativity and Relativistic
Astrophysics (Calgary 1997). Revision - 2 figures improved, 2 paragraphs
added, 2 acknowledgements added | null | null | WATPHYS-TH97/15 | gr-qc | null | In this paper, we investigate the pair creation of charged and rotating black
hole pairs in a background with a positive cosmological constant. Instantons to
describe this situation are constructed from the Kerr-Newmann deSitter
solutions to the Einstein-Maxwell equations and the actions of these instantons
are calcu... | [
{
"created": "Tue, 11 Nov 1997 16:36:06 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Dec 1997 21:32:26 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Booth",
"I. S. N.",
""
],
[
"Mann",
"R. B.",
""
]
] | In this paper, we investigate the pair creation of charged and rotating black hole pairs in a background with a positive cosmological constant. Instantons to describe this situation are constructed from the Kerr-Newmann deSitter solutions to the Einstein-Maxwell equations and the actions of these instantons are calcula... |
1510.02359 | Mohammad Nouri-Zonoz | R. Gharechahi, M. Nouri-Zonoz and A. Tavanfar | A tale of two velocities: Threading vs Slicing | 24 Pages,7 figures, 2 sections are added in this new version | Int. J. Geom. Meth. Mod. Phys. Vol. 15 (2018) 1850047 | 10.1142/S0219887818500470 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two principal definitions of a 3-velocity assigned to a test particle
following timelike trajectories in stationary spacetimes are introduced and
analyzed systematically. These definitions are based on the $1+3$ (threading)
and $3+1$ (slicing) spacetime decomposition formalisms and defined relative to
two different s... | [
{
"created": "Thu, 8 Oct 2015 15:16:32 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Nov 2015 13:53:24 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Dec 2015 15:16:39 GMT",
"version": "v3"
},
{
"created": "Sat, 4 Mar 2017 08:40:15 GMT",
"version": "v4"
}
] | 2017-12-14 | [
[
"Gharechahi",
"R.",
""
],
[
"Nouri-Zonoz",
"M.",
""
],
[
"Tavanfar",
"A.",
""
]
] | Two principal definitions of a 3-velocity assigned to a test particle following timelike trajectories in stationary spacetimes are introduced and analyzed systematically. These definitions are based on the $1+3$ (threading) and $3+1$ (slicing) spacetime decomposition formalisms and defined relative to two different set... |
0806.2390 | Masato Minamitsuji | Masato Minamitsuji | Self-accelerating solutions in the cascading DGP braneworld | 4 pages, critical changes | Phys.Lett.B684:92-95,2010 | 10.1016/j.physletb.2010.01.010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The self-accelerating branch of the Dvali-Gabadadze-Porrati (DGP)
five-dimensional braneworld has provided a compelling model for the current
cosmic acceleration. Recent observations, however, have not favored it so much.
We discuss the solutions which contain a de Sitter 3-brane in the cascading DGP
braneworld model... | [
{
"created": "Sat, 14 Jun 2008 17:22:11 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Nov 2009 09:00:54 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Jan 2010 06:15:26 GMT",
"version": "v3"
}
] | 2010-02-01 | [
[
"Minamitsuji",
"Masato",
""
]
] | The self-accelerating branch of the Dvali-Gabadadze-Porrati (DGP) five-dimensional braneworld has provided a compelling model for the current cosmic acceleration. Recent observations, however, have not favored it so much. We discuss the solutions which contain a de Sitter 3-brane in the cascading DGP braneworld model, ... |
gr-qc/9903074 | D. V. Ahluwalia | D. V. Ahluwalia (Zacatecas) | Quantum Gravity - Testing Time for Theories | null | Nature 398:199,1999 | 10.1038/18325 | null | gr-qc astro-ph hep-ph hep-th | null | The extreme smallness of both the Planck length, on the one side, and the
ratio of the gravitational to the electrical forces between, say, two
electrons, on the other side has led to a widespread belief that the realm of
quantum gravity is beyond terrestrial experiments. A series of classical and
quantum arguments a... | [
{
"created": "Thu, 18 Mar 1999 23:20:19 GMT",
"version": "v1"
}
] | 2011-06-16 | [
[
"Ahluwalia",
"D. V.",
"",
"Zacatecas"
]
] | The extreme smallness of both the Planck length, on the one side, and the ratio of the gravitational to the electrical forces between, say, two electrons, on the other side has led to a widespread belief that the realm of quantum gravity is beyond terrestrial experiments. A series of classical and quantum arguments are... |
1002.0121 | Antoine Folacci | Yves D\'ecanini, Antoine Folacci and Bernard Raffaelli | Unstable circular null geodesics of static spherically symmetric black
holes, Regge poles and quasinormal frequencies | v2: One reference corrected, typos fixed. v3: We now discuss the
meaning of superluminal dispersion relations for the "surface waves" lying on
the photon sphere. v4: Version to appear in Phys. Rev. D. | Phys.Rev.D81:104039,2010 | 10.1103/PhysRevD.81.104039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a wide class of static spherically symmetric black holes of
arbitrary dimension with a photon sphere (a hypersurface on which a massless
particle can orbit the black hole on unstable circular null geodesics). This
class includes various spacetimes of physical interest such as Schwarzschild,
Schwarzschild-... | [
{
"created": "Sun, 31 Jan 2010 12:59:56 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Apr 2010 04:42:29 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Apr 2010 06:32:58 GMT",
"version": "v3"
},
{
"created": "Wed, 5 May 2010 17:11:42 GMT",
"version": "v4"
}
] | 2010-05-20 | [
[
"Décanini",
"Yves",
""
],
[
"Folacci",
"Antoine",
""
],
[
"Raffaelli",
"Bernard",
""
]
] | We consider a wide class of static spherically symmetric black holes of arbitrary dimension with a photon sphere (a hypersurface on which a massless particle can orbit the black hole on unstable circular null geodesics). This class includes various spacetimes of physical interest such as Schwarzschild, Schwarzschild-Ta... |
2304.14465 | Genly Le\'on | Genly Leon, Miguel A. Garc\'ia-Aspeitia, Guillermo Fernandez-Anaya,
Alberto Hern\'andez-Almada, Juan Maga\~na and Esteban Gonz\'alez | Cosmology under the fractional calculus approach: a possible $H_0$
tension resolution? | We have gathered information from arXiv:2207.00878 and
arXiv:2303.16409 to create a report on the topic of [gr-qc]. The report
focuses on the presentation given by Genly Leon at the Tensions in Cosmology
Corfu2022 conference, titled "Cosmology under the fractional calculus
approach: a possible $H_0$ tension res... | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a new field of study called fractional cosmology has emerged. It
uses fractional calculus to modify the standard derivative equations and change
the Friedmann equations. The evolution of cosmic species densities is also
affected by the $\mu$ fractional parameter and the age of the Universe $t_0$.
This new a... | [
{
"created": "Thu, 27 Apr 2023 18:51:42 GMT",
"version": "v1"
}
] | 2023-05-01 | [
[
"Leon",
"Genly",
""
],
[
"García-Aspeitia",
"Miguel A.",
""
],
[
"Fernandez-Anaya",
"Guillermo",
""
],
[
"Hernández-Almada",
"Alberto",
""
],
[
"Magaña",
"Juan",
""
],
[
"González",
"Esteban",
""
]
] | Recently, a new field of study called fractional cosmology has emerged. It uses fractional calculus to modify the standard derivative equations and change the Friedmann equations. The evolution of cosmic species densities is also affected by the $\mu$ fractional parameter and the age of the Universe $t_0$. This new app... |
2001.02953 | Serge Sedov Yu | M.V. Gorbatenko, S.Yu. Sedov | Comparison of conformal gravitation theories by solutions analogous to
Reissner-Nordstr\"om ones | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact solution was produced for one of the versions of conformal
-invariant gravitation theories (conformal geometrodynamics - CG) for the body
with a mass and an electric charge. The solution is analogous to the
Reissner-Nordstr\"{o}m solution in the general relativity theory. Its similar
solution was earlier pro... | [
{
"created": "Thu, 9 Jan 2020 12:50:58 GMT",
"version": "v1"
}
] | 2020-01-10 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Sedov",
"S. Yu.",
""
]
] | An exact solution was produced for one of the versions of conformal -invariant gravitation theories (conformal geometrodynamics - CG) for the body with a mass and an electric charge. The solution is analogous to the Reissner-Nordstr\"{o}m solution in the general relativity theory. Its similar solution was earlier produ... |
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