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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0710.2395 | Seokcheon Lee | Seokcheon Lee | Stability of Palatini-f(R) cosmology | 12 pages, References added, Detail calculations are added in the
appendix | null | null | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolution of linear cosmological perturbations in modified theories of
gravity is investigated assuming the Palatini formalism. It has been discussed
about the stability problem in this model based on the equivalence between f(R)
gravity and the scalar tensor theory. However, we study this problem in the
physical... | [
{
"created": "Fri, 12 Oct 2007 07:21:58 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jan 2008 07:21:36 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Jun 2008 09:58:28 GMT",
"version": "v3"
}
] | 2008-06-18 | [
[
"Lee",
"Seokcheon",
""
]
] | The evolution of linear cosmological perturbations in modified theories of gravity is investigated assuming the Palatini formalism. It has been discussed about the stability problem in this model based on the equivalence between f(R) gravity and the scalar tensor theory. However, we study this problem in the physical f... |
1709.06549 | Pedram Niazy | Pedram Niazy and Amir H. Abbassi | An analytical approach to the CMB anisotropies in a Spatially Closed
background | 15 pages, 8 figures | Astroparticle physics journal,94 (2017) | 10.1016/j.astropartphys.2017.08.003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scalar mode temperature fluctuations of the cosmic microwave background
has been derived in a spatially closed universe from two different methods.
First, by following the photon trajectory after the last scattering and then
from the Boltzmann equation in a closed background and the line of sight
integral method.... | [
{
"created": "Tue, 19 Sep 2017 17:51:02 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Niazy",
"Pedram",
""
],
[
"Abbassi",
"Amir H.",
""
]
] | The scalar mode temperature fluctuations of the cosmic microwave background has been derived in a spatially closed universe from two different methods. First, by following the photon trajectory after the last scattering and then from the Boltzmann equation in a closed background and the line of sight integral method. A... |
gr-qc/0604078 | Alan J. Weinstein | Osamu Miyakawa, Robert Ward, Rana Adhikari, Matthew Evans, Benjamin
Abbott, Rolf Bork, Daniel Busby, Jay Heefner, Alexander Ivanov, Michael
Smith, Robert Taylor, Stephen Vass, Alan Weinstein, Monica Varvella, Seiji
Kawamura, Fumiko Kawazoe, Shihori Sakata, Conor Mow-Lowry | Measurement of Optical Response of a Detuned Resonant Sideband
Extraction Interferometer | 6 pages, 4 figures, for submission to Phys Rev Letters | Phys.Rev. D74 (2006) 022001 | 10.1103/PhysRevD.74.022001 | null | gr-qc | null | We report on the optical response of a suspended-mass detuned resonant
sideband extraction (RSE) interferometer with power recycling. The purpose of
the detuned RSE configuration is to manipulate and optimize the optical
response of the interferometer to differential displacements (induced by
gravitational waves) as ... | [
{
"created": "Tue, 18 Apr 2006 18:12:53 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Miyakawa",
"Osamu",
""
],
[
"Ward",
"Robert",
""
],
[
"Adhikari",
"Rana",
""
],
[
"Evans",
"Matthew",
""
],
[
"Abbott",
"Benjamin",
""
],
[
"Bork",
"Rolf",
""
],
[
"Busby",
"Daniel",
""
],
[
"Heefn... | We report on the optical response of a suspended-mass detuned resonant sideband extraction (RSE) interferometer with power recycling. The purpose of the detuned RSE configuration is to manipulate and optimize the optical response of the interferometer to differential displacements (induced by gravitational waves) as a ... |
2310.13645 | Mattia Villani Dr | Mattia Villani | Perturbative and semi-analytical solutions to Teukolsky equations for
massive fermions | 17 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we aim at solving the Teukolsky equations for a fermion with
mass $m_e\neq 0$ in the presence of a rotating black hole with mass $M$. We
consider two different regimes: $\tilde{m}_e= M^{-1} m_e\ll 1$ and $a\omega \ll
1$; $\tilde{m}_e\ll 1$ and $a\omega \gtrsim 1$. We treat each of these two
regimes in d... | [
{
"created": "Fri, 20 Oct 2023 16:44:51 GMT",
"version": "v1"
}
] | 2023-10-23 | [
[
"Villani",
"Mattia",
""
]
] | In this work, we aim at solving the Teukolsky equations for a fermion with mass $m_e\neq 0$ in the presence of a rotating black hole with mass $M$. We consider two different regimes: $\tilde{m}_e= M^{-1} m_e\ll 1$ and $a\omega \ll 1$; $\tilde{m}_e\ll 1$ and $a\omega \gtrsim 1$. We treat each of these two regimes in dif... |
gr-qc/0507117 | Filimonova Irina V | A.M. Cherepashchuk | Searches for Black Holes. the Most Recent Results | Plenary talk presented at Workshop on High Energy Physics&Field
Theory (Protvino, Russia, 2004) | null | null | hepft/2004/1 | gr-qc | null | Black holes were predicted by Einstein General Relativity (GR). Because of
unusual properties of these objects their existence is almost unbelievable.
There are gravitation theories which do not predict the black hole appearance.
By now, astronomers discovered a few hundreds of massive and highly compact
objects with... | [
{
"created": "Thu, 28 Jul 2005 10:05:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cherepashchuk",
"A. M.",
""
]
] | Black holes were predicted by Einstein General Relativity (GR). Because of unusual properties of these objects their existence is almost unbelievable. There are gravitation theories which do not predict the black hole appearance. By now, astronomers discovered a few hundreds of massive and highly compact objects with o... |
gr-qc/9306018 | Hans-Juergen Matschull | H.-J. Matschull and H. Nicolai | Canonical Quantum Supergravity in Three Dimensions, (some lines lost
during submission) | 40 pages, LaTeX, DESY 93-073 | Nucl.Phys. B411 (1994) 609-646 | 10.1016/0550-3213(94)90464-2 | null | gr-qc hep-th | null | We discuss the canonical treatment and quantization of matter coupled
supergravity in three dimensions, with special emphasis on $N=2$ supergravity.
We then analyze the quantum constraint algebra; certain operator ordering
ambiguities are found to be absent due to local supersymmetry. We show that the
supersymmetry c... | [
{
"created": "Tue, 15 Jun 1993 14:36:54 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jun 1993 10:23:01 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Matschull",
"H. -J.",
""
],
[
"Nicolai",
"H.",
""
]
] | We discuss the canonical treatment and quantization of matter coupled supergravity in three dimensions, with special emphasis on $N=2$ supergravity. We then analyze the quantum constraint algebra; certain operator ordering ambiguities are found to be absent due to local supersymmetry. We show that the supersymmetry con... |
2109.12345 | Betti Hartmann | Y. Brihaye, B. Hartmann, B. Kleihaus and J. Kunz | Horndeski Proca stars with vector hair | v2: three figures added, discussion on photon orbits added; matches
version accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.105.044050 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study Proca stars in a vector-tensor gravity model inspired by Horndeski's
generalized Einstein-Maxwell field equations, supplemented with a mass term for
the vector field. We discuss the effects of the non-minimal coupling term on
the properties of the resulting Proca stars. %and show that they can form
vector ha... | [
{
"created": "Sat, 25 Sep 2021 11:25:48 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jan 2022 20:48:17 GMT",
"version": "v2"
}
] | 2022-03-09 | [
[
"Brihaye",
"Y.",
""
],
[
"Hartmann",
"B.",
""
],
[
"Kleihaus",
"B.",
""
],
[
"Kunz",
"J.",
""
]
] | We study Proca stars in a vector-tensor gravity model inspired by Horndeski's generalized Einstein-Maxwell field equations, supplemented with a mass term for the vector field. We discuss the effects of the non-minimal coupling term on the properties of the resulting Proca stars. %and show that they can form vector hair... |
1609.04202 | Yuri Pavlov | A. A. Grib, Yu. V. Pavlov | Comparison of particle properties in Kerr metric and in rotating
coordinates | 20 pages, 3 figures | Gen. Relativ. Gravit. 49 (2017) 78 | 10.1007/s10714-017-2238-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Properties of particles in Kerr metric are compared with properties of
particles in rotating coordinates in Minkowski space-time. It is shown that
particles with negative and zero energies existing in the ergosphere of the
rotating black hole also exist in the region out of the static limit in
rotating coordinates in... | [
{
"created": "Wed, 14 Sep 2016 10:16:16 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Jul 2017 20:00:41 GMT",
"version": "v2"
}
] | 2017-07-04 | [
[
"Grib",
"A. A.",
""
],
[
"Pavlov",
"Yu. V.",
""
]
] | Properties of particles in Kerr metric are compared with properties of particles in rotating coordinates in Minkowski space-time. It is shown that particles with negative and zero energies existing in the ergosphere of the rotating black hole also exist in the region out of the static limit in rotating coordinates in M... |
0908.4329 | Jakub Mielczarek | Jakub Mielczarek | The Observational Implications of Loop Quantum Cosmology | 11 pages, 7 figures | Phys.Rev.D81:063503,2010 | 10.1103/PhysRevD.81.063503 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider realistic model of inflation embedded in the
framework of loop quantum cosmology. Phase of inflation is preceded here by the
phase of a quantum bounce. We show how parameters of inflation depend on the
initial conditions established in the contracting, pre-bounce phase. Our
investigations in... | [
{
"created": "Sat, 29 Aug 2009 09:32:53 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Mielczarek",
"Jakub",
""
]
] | In this paper we consider realistic model of inflation embedded in the framework of loop quantum cosmology. Phase of inflation is preceded here by the phase of a quantum bounce. We show how parameters of inflation depend on the initial conditions established in the contracting, pre-bounce phase. Our investigations indi... |
2206.13705 | Yiqian Chen | Yiqian Chen, Guangzhou Guo, Peng Wang, Houwen Wu, Haitang Yang | Appearance of an Infalling Star in Black Holes with Multiple Photon
Spheres | 28 pages,10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Photon spheres play a pivotal role in the imaging of luminous objects near
black holes. In this paper, we examine observational appearances of a star
freely falling in hairy black holes, which can possess one or two photon
spheres outside the event horizon. When there exists a single photon sphere,
the total luminosi... | [
{
"created": "Tue, 28 Jun 2022 02:34:49 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jul 2022 11:29:32 GMT",
"version": "v2"
}
] | 2022-07-07 | [
[
"Chen",
"Yiqian",
""
],
[
"Guo",
"Guangzhou",
""
],
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | Photon spheres play a pivotal role in the imaging of luminous objects near black holes. In this paper, we examine observational appearances of a star freely falling in hairy black holes, which can possess one or two photon spheres outside the event horizon. When there exists a single photon sphere, the total luminosity... |
1603.03821 | Mauricio Bellini | Marcos R. A. Arcod\'ia, Mauricio Bellini (IFIMAR - CONICET & UNMdP) | Geometric back-reaction in pre-inflation from relativistic quantum
geometry | improved version | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The pre-inflationary evolution of the universe describes the beginning of the
expansion from a static initial state, such that the Hubble parameter is
initially zero, but increases to an asymptotic constant value, in which it
could achieve a de Sitter (inflationary) expansion. The expansion is driven by
a background ... | [
{
"created": "Fri, 11 Mar 2016 23:30:32 GMT",
"version": "v1"
},
{
"created": "Wed, 4 May 2016 20:40:13 GMT",
"version": "v2"
},
{
"created": "Thu, 26 May 2016 20:24:29 GMT",
"version": "v3"
}
] | 2016-05-30 | [
[
"Arcodía",
"Marcos R. A.",
"",
"IFIMAR - CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR - CONICET & UNMdP"
]
] | The pre-inflationary evolution of the universe describes the beginning of the expansion from a static initial state, such that the Hubble parameter is initially zero, but increases to an asymptotic constant value, in which it could achieve a de Sitter (inflationary) expansion. The expansion is driven by a background ph... |
2308.09174 | Fabio Duvan Lora Clavijo | German D. Prada-M\'endez, F. D. Lora-Clavijo and J. M.
Vel\'asquez-Cadavid | Synchrotron emitting Komissarov torus around naked singularities | 27 pages, 9 figures. Accepted for publication in Classical and
Quantum Gravity | Classical and Quantum Gravity, Volume 40, Number 19, 31 August
2023 | 10.1088/1361-6382/acf17e | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From a theoretical perspective, matter accretion processes around compact
objects are highly relevant as they serve as a natural laboratory to test
general relativity in the strong field regime. This enables us to validate
fundamental concepts such as the no-hair theorem, the cosmic censorship
hypothesis, and the exi... | [
{
"created": "Thu, 17 Aug 2023 20:24:41 GMT",
"version": "v1"
}
] | 2023-09-07 | [
[
"Prada-Méndez",
"German D.",
""
],
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Velásquez-Cadavid",
"J. M.",
""
]
] | From a theoretical perspective, matter accretion processes around compact objects are highly relevant as they serve as a natural laboratory to test general relativity in the strong field regime. This enables us to validate fundamental concepts such as the no-hair theorem, the cosmic censorship hypothesis, and the exist... |
gr-qc/9911022 | K. Srinivasan | K. Srinivasan and T. Padmanabhan | A novel approach to particle production in an uniform electric field | 12 pages, Revtex file | null | null | IUCAA-42/99 | gr-qc hep-th | null | We outline a different method of describing scalar field particle production
in a uniform electric field. In the standard approach, the (analytically
continued) harmonic oscillator paradigm is important in describing particle
production. However, there is another gauge in which the particle production
process has str... | [
{
"created": "Sun, 7 Nov 1999 06:12:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Srinivasan",
"K.",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We outline a different method of describing scalar field particle production in a uniform electric field. In the standard approach, the (analytically continued) harmonic oscillator paradigm is important in describing particle production. However, there is another gauge in which the particle production process has strik... |
2304.08360 | Dario Sauro | Riccardo Martini, Gregorio Paci, Dario Sauro | Covariant spin-parity decomposition of the Torsion and Path Integrals | 29 pages, 1 table, published version | Class.Quant.Grav. 40 (2023) 19, 195005 | 10.1088/1361-6382/acf08b | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a functional measure over the torsion tensor. We discuss two
completely equivalent choices for the Wheeler-DeWitt supermetric for this
field, the first one being based on its algebraic decomposition, the other
inspired by teleparallel theories of gravity. The measure is formally defined
by requiring the no... | [
{
"created": "Mon, 17 Apr 2023 15:22:31 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jan 2024 16:07:57 GMT",
"version": "v2"
}
] | 2024-01-25 | [
[
"Martini",
"Riccardo",
""
],
[
"Paci",
"Gregorio",
""
],
[
"Sauro",
"Dario",
""
]
] | We propose a functional measure over the torsion tensor. We discuss two completely equivalent choices for the Wheeler-DeWitt supermetric for this field, the first one being based on its algebraic decomposition, the other inspired by teleparallel theories of gravity. The measure is formally defined by requiring the norm... |
1702.06745 | Ettore Minguzzi | E. Minguzzi | Affine sphere spacetimes which satisfy the relativity principle | 17 pages, 3+3 figures | Phys. Rev. D95, 024019 (2017) | 10.1103/PhysRevD.95.024019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of Lorentz-Finsler spacetime theories the relativity principle
holds at a spacetime point if the indicatrix (observer space) is homogeneous.
We point out that in four spacetime dimensions there are just three kinematical
models which respect an exact form of the relativity principle and for which
all o... | [
{
"created": "Wed, 22 Feb 2017 10:42:32 GMT",
"version": "v1"
}
] | 2017-02-23 | [
[
"Minguzzi",
"E.",
""
]
] | In the context of Lorentz-Finsler spacetime theories the relativity principle holds at a spacetime point if the indicatrix (observer space) is homogeneous. We point out that in four spacetime dimensions there are just three kinematical models which respect an exact form of the relativity principle and for which all obs... |
0807.3804 | J. Ponce de Leon | J. Ponce de Leon | Wave-like Solutions for Bianchi type-I cosmologies in 5D | null | JCAP 0810:014,2008 | 10.1088/1475-7516/2008/10/014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive exact solutions to the vacuum Einstein field equations in 5D, under
the assumption that (i) the line element in 5D possesses self-similar symmetry,
in the classical understanding of Sedov, Taub and Zeldovich, and that (ii) the
metric tensor is diagonal and independent of the coordinates for ordinary 3D
spac... | [
{
"created": "Thu, 24 Jul 2008 07:05:48 GMT",
"version": "v1"
}
] | 2009-03-12 | [
[
"de Leon",
"J. Ponce",
""
]
] | We derive exact solutions to the vacuum Einstein field equations in 5D, under the assumption that (i) the line element in 5D possesses self-similar symmetry, in the classical understanding of Sedov, Taub and Zeldovich, and that (ii) the metric tensor is diagonal and independent of the coordinates for ordinary 3D space.... |
1601.03701 | Gergely Sz\'ekely | Gergely Sz\'ekely | On some Symmetry Axioms in Relativity Theories | 15 pages, 1 figure | Symmetry: Cutlure and Science, Vol. 26. No. 4, 405-420, 2015 | null | null | gr-qc math-ph math.LO math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we review two symmetry axioms of special relativity and their
connections to each other together with their role in some famous predictions
of relativity theory, such as time dilation, length contraction, and the twin
paradox. We also discuss briefly counterparts of these symmetry axioms in
general rela... | [
{
"created": "Thu, 14 Jan 2016 19:20:42 GMT",
"version": "v1"
}
] | 2016-01-15 | [
[
"Székely",
"Gergely",
""
]
] | In this paper we review two symmetry axioms of special relativity and their connections to each other together with their role in some famous predictions of relativity theory, such as time dilation, length contraction, and the twin paradox. We also discuss briefly counterparts of these symmetry axioms in general relati... |
1606.06971 | Jinn-Ouk Gong | Jinn-Ouk Gong | Multi-field inflation and cosmological perturbations | (v1) 59 pages, 8 figures, invited review for International Journal of
Modern Physics D; (v2) 60 pages, typos corrected and references added | null | 10.1142/S021827181740003X | APCTP-Pre2016-012 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a concise review on multi-field inflation and cosmological
perturbations. We discuss convenient and physically meaningful bases in terms
of which perturbations can be systematically studied. We give formal accounts
on the gauge fixing conditions and present the perturbation action in two
gauges. We also br... | [
{
"created": "Mon, 20 Jun 2016 21:11:22 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Aug 2016 07:17:57 GMT",
"version": "v2"
}
] | 2017-02-08 | [
[
"Gong",
"Jinn-Ouk",
""
]
] | We provide a concise review on multi-field inflation and cosmological perturbations. We discuss convenient and physically meaningful bases in terms of which perturbations can be systematically studied. We give formal accounts on the gauge fixing conditions and present the perturbation action in two gauges. We also brie... |
1912.04203 | Jeronimo Cortez | Jer\'onimo Cortez, Guillermo A. Mena Marug\'an, Jos\'e Velhinho | Quantum linear scalar fields with time dependent potentials: Overview
and applications to cosmology | 57 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we present an overview of uniqueness results derived in recent
years for the quantization of Gowdy cosmological models and for (test)
Klein-Gordon fields minimally coupled to
Friedmann-Lema\^{\i}tre-Robertson-Walker, de Sitter, and Bianchi I spacetimes.
These results are attained by imposing the criteri... | [
{
"created": "Mon, 9 Dec 2019 17:36:56 GMT",
"version": "v1"
}
] | 2019-12-10 | [
[
"Cortez",
"Jerónimo",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Velhinho",
"José",
""
]
] | In this work, we present an overview of uniqueness results derived in recent years for the quantization of Gowdy cosmological models and for (test) Klein-Gordon fields minimally coupled to Friedmann-Lema\^{\i}tre-Robertson-Walker, de Sitter, and Bianchi I spacetimes. These results are attained by imposing the criteria ... |
1505.06481 | Oleg Tsupko | Oleg Yu. Tsupko | Unbound motion of massive particles in the Schwarzschild metric:
Analytical description in case of strong deflection | See also our previous paper arXiv:1305.7032 | Physical Review D 89, 084075 (2014) | 10.1103/PhysRevD.89.084075 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deflection angles of massive test particles moving along an unbound
trajectory in the Schwarzschild metric are considered for the case of large
deflection. We analytically consider the strong deflection limit, which is
opposite to the commonly applied small deflection approximation and corresponds
to the situation wh... | [
{
"created": "Sun, 24 May 2015 21:07:41 GMT",
"version": "v1"
},
{
"created": "Tue, 26 May 2015 13:21:38 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Tsupko",
"Oleg Yu.",
""
]
] | Deflection angles of massive test particles moving along an unbound trajectory in the Schwarzschild metric are considered for the case of large deflection. We analytically consider the strong deflection limit, which is opposite to the commonly applied small deflection approximation and corresponds to the situation when... |
0706.4402 | Ludovico Carbone | L. Carbone, A. Cavalleri, G. Ciani, R. Dolesi, M. Hueller, D.
Tombolato, S. Vitale, and W. J. Weber | Thermal gradient-induced forces on geodetic reference masses for LISA | 21 pages, 16 figures, submitted to Physical Review D | Phys.Rev.D76:102003,2007 | 10.1103/PhysRevD.76.102003 | null | gr-qc | null | The low frequency sensitivity of space-borne gravitational wave observatories
will depend critically on the geodetic purity of the trajectories of orbiting
test masses. Fluctuations in the temperature difference across the enclosure
surrounding the free-falling test mass can produce noisy forces through several
proce... | [
{
"created": "Fri, 29 Jun 2007 13:29:27 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Carbone",
"L.",
""
],
[
"Cavalleri",
"A.",
""
],
[
"Ciani",
"G.",
""
],
[
"Dolesi",
"R.",
""
],
[
"Hueller",
"M.",
""
],
[
"Tombolato",
"D.",
""
],
[
"Vitale",
"S.",
""
],
[
"Weber",
"W. J.",
... | The low frequency sensitivity of space-borne gravitational wave observatories will depend critically on the geodetic purity of the trajectories of orbiting test masses. Fluctuations in the temperature difference across the enclosure surrounding the free-falling test mass can produce noisy forces through several process... |
0711.1952 | Nakia Carlevaro | Nakia Carlevaro, Giovanni Montani | Study of the Quasi-isotropic Solution near the Cosmological Singularity
in Presence of Bulk-Viscosity | 15 pages, no figure | Int. J. Mod. Phys. D 17, 881-896 (2008) | 10.1142/S0218271808012553 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the dynamical behavior of a quasi-isotropic Universe in the
presence of a cosmological fluid endowed with bulk viscosity. We express the
viscosity coefficient as a power-law of the fluid energy density:
$\zeta=\zeta_0\epsilon^{s}$. Then we fix $s=1/2$ as the only case in which
viscosity plays a significant... | [
{
"created": "Tue, 13 Nov 2007 11:34:22 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jul 2008 15:50:43 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Mar 2009 11:21:07 GMT",
"version": "v3"
}
] | 2009-03-24 | [
[
"Carlevaro",
"Nakia",
""
],
[
"Montani",
"Giovanni",
""
]
] | We analyze the dynamical behavior of a quasi-isotropic Universe in the presence of a cosmological fluid endowed with bulk viscosity. We express the viscosity coefficient as a power-law of the fluid energy density: $\zeta=\zeta_0\epsilon^{s}$. Then we fix $s=1/2$ as the only case in which viscosity plays a significant r... |
gr-qc/9503024 | Steve Carlip | Steven Carlip | Lectures in (2+1)-Dimensional Gravity | 42 pages, LaTeX, four eps figures (two figures from picture
environment now replaced by eps figures to accomodate old versions of LaTeX;
three references corrected) | J.Korean Phys.Soc.28:S447-S467,1995 | null | UCD-95-6 | gr-qc | null | These lectures briefly review our current understanding of classical and
quantum gravity in three spacetime dimensions, concentrating on the quantum
mechanics of closed universes and the (2+1)-dimensional black hole. Three
formulations of the classical theory and three approaches to quantization are
discussed in some... | [
{
"created": "Tue, 14 Mar 1995 19:39:16 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Mar 1995 04:01:44 GMT",
"version": "v2"
}
] | 2010-04-28 | [
[
"Carlip",
"Steven",
""
]
] | These lectures briefly review our current understanding of classical and quantum gravity in three spacetime dimensions, concentrating on the quantum mechanics of closed universes and the (2+1)-dimensional black hole. Three formulations of the classical theory and three approaches to quantization are discussed in some d... |
1904.03032 | Burkhard Kleihaus | Christian Hoffmann, Theodora Ioannidou, Sarah Kahlen, Burkhard
Kleihaus, Jutta Kunz | Wormholes Immersed in Rotating Matter | 6 pages, 3 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Ellis wormholes immersed in rotating matter in the form of an
ordinary complex boson field. The resulting wormholes may possess full
reflection symmetry with respect to the two asymptotically flat spacetime
regions. However, there arise also wormhole solutions where the reflection
symmetry is broken. The ... | [
{
"created": "Fri, 5 Apr 2019 12:32:10 GMT",
"version": "v1"
}
] | 2019-04-08 | [
[
"Hoffmann",
"Christian",
""
],
[
"Ioannidou",
"Theodora",
""
],
[
"Kahlen",
"Sarah",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We consider Ellis wormholes immersed in rotating matter in the form of an ordinary complex boson field. The resulting wormholes may possess full reflection symmetry with respect to the two asymptotically flat spacetime regions. However, there arise also wormhole solutions where the reflection symmetry is broken. The la... |
gr-qc/9511036 | J. Frauendiener | J\"org Frauendiener (Max-Planck-Institut f\"ur Gravitationsphysik) and
George A. J. Sparling (Department of Mathematics and Statistics, University
of Pittsburgh) | On a class of consistent linear higher spin equations on curved
manifolds | 32 pages, REVTEX | J.Geom.Phys. 30 (1999) 54-101 | 10.1016/S0393-0440(98)00050-3 | null | gr-qc | null | We analyze a class of linear wave equations for odd half spin that have a
well posed initial value problem. We demonstrate consistency of the equations
in curved space-times. They generalize the Weyl neutrino equation. We show that
there exists an associated invariant exact set of spinor fields indicating that
the ch... | [
{
"created": "Sat, 11 Nov 1995 16:35:13 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Frauendiener",
"Jörg",
"",
"Max-Planck-Institut für Gravitationsphysik"
],
[
"Sparling",
"George A. J.",
"",
"Department of Mathematics and Statistics, University\n of Pittsburgh"
]
] | We analyze a class of linear wave equations for odd half spin that have a well posed initial value problem. We demonstrate consistency of the equations in curved space-times. They generalize the Weyl neutrino equation. We show that there exists an associated invariant exact set of spinor fields indicating that the char... |
1107.4167 | Sergey Vyatchanin | Alexey G. Gurkovsky, Daniel Heiner, Stefan Hild, Ronny Nawrodt,
Kentaro Somiya, Sergey P. Vyatchanin, Holger Wittel | Reducing Thermal Noise in Future Gravitational Wave Detectors by
employing Khalili Etalons | 13 pages, 9 figures | null | 10.1016/j.physleta.2011.07.063 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Reduction of thermal noise in dielectric mirror coatings is a key issue for
the sensitivity improvement in second and third generation interferometric
gravitational wave detectors. Replacing an end mirror of the interferometer by
an anti-resonant cavity (a so-called Khalili cavity) has been proposed to
realize the re... | [
{
"created": "Thu, 21 Jul 2011 05:15:01 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Gurkovsky",
"Alexey G.",
""
],
[
"Heiner",
"Daniel",
""
],
[
"Hild",
"Stefan",
""
],
[
"Nawrodt",
"Ronny",
""
],
[
"Somiya",
"Kentaro",
""
],
[
"Vyatchanin",
"Sergey P.",
""
],
[
"Wittel",
"Holger",
""
]... | Reduction of thermal noise in dielectric mirror coatings is a key issue for the sensitivity improvement in second and third generation interferometric gravitational wave detectors. Replacing an end mirror of the interferometer by an anti-resonant cavity (a so-called Khalili cavity) has been proposed to realize the redu... |
1508.05338 | Viqar Husain | Viqar Husain and Jorma Louko | Low energy Lorentz violation from modified dispersion at high energies | 5 pages, 3 figures. Revised with title change to emphasize generality
of main result. Version to appear in Phys. Rev. Lett | Phys. Rev. Lett. 116, 061301 (2016) | 10.1103/PhysRevLett.116.061301 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many quantum theories of gravity propose Lorentz violating dispersion
relations of the form $\omega = |k|\, f(|k|/M)$, with recovery of approximate
Lorentz invariance at energy scales much below $M$. We show that a quantum
field with this dispersion predicts drastic low energy Lorentz violation in
atoms modelled as U... | [
{
"created": "Fri, 21 Aug 2015 17:52:31 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2016 03:12:07 GMT",
"version": "v2"
}
] | 2016-02-17 | [
[
"Husain",
"Viqar",
""
],
[
"Louko",
"Jorma",
""
]
] | Many quantum theories of gravity propose Lorentz violating dispersion relations of the form $\omega = |k|\, f(|k|/M)$, with recovery of approximate Lorentz invariance at energy scales much below $M$. We show that a quantum field with this dispersion predicts drastic low energy Lorentz violation in atoms modelled as Unr... |
1611.05721 | Federico Lopez Armengol | Federico G. Lopez Armengol, Gustavo E. Romero | Neutron stars in Scalar-Tensor-Vector Gravity | The final publication is available at Springer via
http://dx.doi.org/10.1007/s10714-017-2184-0 | General Relativity and Gravitation, 49(2), 1-15 (2017) | 10.1007/s10714-017-2184-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-Tensor-Vector Gravity (STVG), also referred as MOdified Gravity (MOG),
is an alternative theory of the gravitational interaction. Its weak field
approximation has been successfully used to described Solar System
observations, galaxy rotation curves, dynamics of clusters of galaxies, and
cosmological data, with... | [
{
"created": "Thu, 17 Nov 2016 14:57:33 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2017 01:41:56 GMT",
"version": "v2"
}
] | 2017-02-02 | [
[
"Armengol",
"Federico G. Lopez",
""
],
[
"Romero",
"Gustavo E.",
""
]
] | Scalar-Tensor-Vector Gravity (STVG), also referred as MOdified Gravity (MOG), is an alternative theory of the gravitational interaction. Its weak field approximation has been successfully used to described Solar System observations, galaxy rotation curves, dynamics of clusters of galaxies, and cosmological data, withou... |
2203.14121 | Bivudutta Mishra Dr. | S.A. Narawade, Laxmipriya Pati, B.Mishra, S.K. Tripathy | Dynamical system analysis for accelerating models in non-metricity
$f(Q)$ gravity | 13 pages, 10 figures, Revision submitted to Physics of the Dark
Universe | Physics of the Dark Universe 36 (2022) 101020 | 10.1016/j.dark.2022.101020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two accelerating cosmological models are presented in symmetric teleparallel
$f(Q)$ gravity, $Q$ be the non-metricity. The models are constructed based on
the assumptions of two different functional forms of $f(Q)$ and a dynamically
changing nature of the deceleration parameter that shows transition at
$t=2n\pm\sqrt{... | [
{
"created": "Sat, 26 Mar 2022 17:43:03 GMT",
"version": "v1"
}
] | 2022-05-25 | [
[
"Narawade",
"S. A.",
""
],
[
"Pati",
"Laxmipriya",
""
],
[
"Mishra",
"B.",
""
],
[
"Tripathy",
"S. K.",
""
]
] | Two accelerating cosmological models are presented in symmetric teleparallel $f(Q)$ gravity, $Q$ be the non-metricity. The models are constructed based on the assumptions of two different functional forms of $f(Q)$ and a dynamically changing nature of the deceleration parameter that shows transition at $t=2n\pm\sqrt{\f... |
1804.02003 | Fran\c{c}ois H\'ebert | Fran\c{c}ois H\'ebert, Lawrence E. Kidder, Saul A. Teukolsky | General-relativistic neutron star evolutions with the discontinuous
Galerkin method | 24 pages, 20 figures, 2 tables. v2: Added figure and paragraphs
discussing convergence in NS simulations. Matches version published in PRD | Phys. Rev. D 98, 044041 (2018) | 10.1103/PhysRevD.98.044041 | null | gr-qc astro-ph.HE physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Simulations of relativistic hydrodynamics often need both high accuracy and
robust shock-handling properties. The discontinuous Galerkin method combines
these features --- a high order of convergence in regions where the solution is
smooth and shock-capturing properties for regions where it is not --- with
geometric ... | [
{
"created": "Thu, 5 Apr 2018 18:01:11 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Aug 2018 11:53:51 GMT",
"version": "v2"
}
] | 2018-08-29 | [
[
"Hébert",
"François",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | Simulations of relativistic hydrodynamics often need both high accuracy and robust shock-handling properties. The discontinuous Galerkin method combines these features --- a high order of convergence in regions where the solution is smooth and shock-capturing properties for regions where it is not --- with geometric fl... |
2204.14018 | Gamal G.L. Nashed | G.G.L. Nashed and Kazuharu Bamba | Compact stellar model in higher torsion gravitational theory | 17 Pages, 9 figures, 3 tables, Accepted in NPB. arXiv admin note:
text overlap with arXiv:2010.06355 | null | 10.1016/j.nuclphysb.2022.115815 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this study, we address the issue of a spherically symmetrical interior
solution to the quadratic form of $f\mathcal{(T)}=\mathcal{T}+\epsilon
\mathcal{T}^2$ gravitational theory using a physical tetrad that provides
vanishing components of the off-components of the field equation, in contrast
to what exists in the... | [
{
"created": "Fri, 29 Apr 2022 11:27:44 GMT",
"version": "v1"
}
] | 2022-05-25 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | In this study, we address the issue of a spherically symmetrical interior solution to the quadratic form of $f\mathcal{(T)}=\mathcal{T}+\epsilon \mathcal{T}^2$ gravitational theory using a physical tetrad that provides vanishing components of the off-components of the field equation, in contrast to what exists in the c... |
1909.06104 | Reinhard Meinel | Reinhard Meinel and Andreas Kleinw\"achter | B\"acklund transforms of the extreme Kerr near-horizon geometry | 7 pages, v3: final version, to appear in Phys. Lett. A | Physics Letters A 384, 126572 (Issue 23, 17 August 2020) | 10.1016/j.physleta.2020.126572 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the method of B\"acklund transformations to generate a new hierarchy
of exact solutions to the vacuum Einstein equations starting from the extreme
Kerr near-horizon geometry. Solutions with extreme Kerr near-horizon
asymptotics containing an arbitrary number of free parameters are included.
| [
{
"created": "Fri, 13 Sep 2019 09:28:03 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Oct 2019 14:01:46 GMT",
"version": "v2"
},
{
"created": "Tue, 12 May 2020 20:12:24 GMT",
"version": "v3"
}
] | 2020-05-21 | [
[
"Meinel",
"Reinhard",
""
],
[
"Kleinwächter",
"Andreas",
""
]
] | We apply the method of B\"acklund transformations to generate a new hierarchy of exact solutions to the vacuum Einstein equations starting from the extreme Kerr near-horizon geometry. Solutions with extreme Kerr near-horizon asymptotics containing an arbitrary number of free parameters are included. |
2407.08320 | Francisco Lobo | David S. Pereira, Jos\'e Pedro Mimoso, Francisco S. N. Lobo | Extension of Buchdahl's Theorem on Reciprocal Solutions | 16 pages. Published in Symmetry | Symmetry 16, 881 (2024) | 10.3390/sym16070881 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the development of Brans-Dicke gravity, it has become well-known that a
conformal transformation of the metric can reformulate this theory,
transferring the coupling of the scalar field from the Ricci scalar to the
matter sector. Specifically, in this new frame, known as the Einstein frame,
Brans-Dicke gravity ... | [
{
"created": "Thu, 11 Jul 2024 09:10:20 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Pereira",
"David S.",
""
],
[
"Mimoso",
"José Pedro",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | Since the development of Brans-Dicke gravity, it has become well-known that a conformal transformation of the metric can reformulate this theory, transferring the coupling of the scalar field from the Ricci scalar to the matter sector. Specifically, in this new frame, known as the Einstein frame, Brans-Dicke gravity is... |
2103.15892 | Mark Hertzberg | Itamar J. Allali, Mark P. Hertzberg | General Relativistic Decoherence with Applications to Dark Matter
Detection | 7 pages in double column format, 1 figure. V2: Updated to resemble
version published in PRL | Phys. Rev. Lett. 127, 031301 (2021) | 10.1103/PhysRevLett.127.031301 | null | gr-qc astro-ph.CO hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum mechanics allows for states in macroscopic superpositions, but they
ordinarily undergo rapid decoherence due to interactions with their
environment. A system that only interacts gravitationally, such as an
arrangement of dark matter (DM), may exhibit slow decoherence. In this Letter,
we compute the decoherenc... | [
{
"created": "Mon, 29 Mar 2021 19:01:17 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jul 2021 18:21:29 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Allali",
"Itamar J.",
""
],
[
"Hertzberg",
"Mark P.",
""
]
] | Quantum mechanics allows for states in macroscopic superpositions, but they ordinarily undergo rapid decoherence due to interactions with their environment. A system that only interacts gravitationally, such as an arrangement of dark matter (DM), may exhibit slow decoherence. In this Letter, we compute the decoherence ... |
0907.0280 | Robert Owen | Robert Owen | The Final Remnant of Binary Black Hole Mergers: Multipolar Analysis | 12 pages, 13 figures. Published version. Some references have been
added and reordered, and the figures cleaned up. | Phys.Rev.D80:084012,2009 | 10.1103/PhysRevD.80.084012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Methods are presented to define and compute source multipoles of dynamical
horizons in numerical relativity codes, extending previous work from the
isolated and dynamical horizon formalisms in a manner that allows for the
consideration of horizons that are not axisymmetric. These methods are then
applied to a binary ... | [
{
"created": "Thu, 2 Jul 2009 02:51:01 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2009 21:34:14 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Apr 2010 22:02:03 GMT",
"version": "v3"
}
] | 2010-04-27 | [
[
"Owen",
"Robert",
""
]
] | Methods are presented to define and compute source multipoles of dynamical horizons in numerical relativity codes, extending previous work from the isolated and dynamical horizon formalisms in a manner that allows for the consideration of horizons that are not axisymmetric. These methods are then applied to a binary bl... |
1906.03718 | Juliano Neves | Juliano C. S. Neves, Alberto Saa | Accretion of perfect fluids onto a class of regular black holes | 9 pages, 1 figure and 1 table. V3 with minor changes. Published in
Annals of Physics | Ann. Phys. 420, 168269 (2020) | 10.1016/j.aop.2020.168269 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the stationary spherical accretion process of perfect fluids onto
a class of spherically symmetric regular black holes corresponding to
quantum-corrected Schwarzschild spacetimes. We show that the accretion rates
can differ from the Schwarzschild case, suggesting that the de Sitter core
inside these regul... | [
{
"created": "Sun, 9 Jun 2019 21:40:42 GMT",
"version": "v1"
},
{
"created": "Wed, 13 May 2020 14:19:39 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Jul 2020 17:50:35 GMT",
"version": "v3"
}
] | 2020-07-28 | [
[
"Neves",
"Juliano C. S.",
""
],
[
"Saa",
"Alberto",
""
]
] | We consider the stationary spherical accretion process of perfect fluids onto a class of spherically symmetric regular black holes corresponding to quantum-corrected Schwarzschild spacetimes. We show that the accretion rates can differ from the Schwarzschild case, suggesting that the de Sitter core inside these regular... |
gr-qc/9511056 | Marcelo Jose Reboucas | G.S. Hall, M.J. Reboucas, J. Santos, A.F.F. Teixeira | On the Algebraic Structure of Second Order Symmetric Tensors in
5-Dimensional Space-times | 10 pages, LaTeX , no figures | Gen.Rel.Grav. 28 (1996) 1107-1113 | 10.1007/BF02113160 | CBPF-NF-080/95 | gr-qc astro-ph | null | A new approach to the algebraic classification of second order symmetric
tensors in 5-dimensional space-times is presented. The possible Segre types for
a symmetric two-tensor are found. A set of canonical forms for each Segre type
is obtained. A theorem which collects together some basic results on the
algebraic str... | [
{
"created": "Tue, 21 Nov 1995 17:37:57 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Hall",
"G. S.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Santos",
"J.",
""
],
[
"Teixeira",
"A. F. F.",
""
]
] | A new approach to the algebraic classification of second order symmetric tensors in 5-dimensional space-times is presented. The possible Segre types for a symmetric two-tensor are found. A set of canonical forms for each Segre type is obtained. A theorem which collects together some basic results on the algebraic struc... |
1605.00583 | Vasilis Oikonomou | V.K. Oikonomou | A Note on Schwarzschild de Sitter Black Holes in Mimetic $F(R)$ Gravity | null | Int. J. Mod. Phys. D, 25, 1650078 (2016) | 10.1142/S0218271816500784 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief note we investigate the conditions under which a Schwarzschild
de Sitter black hole spacetime is a solution of the mimetic $F(R)$ gravity with
Lagrange multiplier and potential. As we demonstrate, the resulting mimetic
$F(R)$ gravity is a slight modification of the ordinary $F(R)$ gravity case,
however ... | [
{
"created": "Mon, 2 May 2016 17:48:24 GMT",
"version": "v1"
}
] | 2016-06-16 | [
[
"Oikonomou",
"V. K.",
""
]
] | In this brief note we investigate the conditions under which a Schwarzschild de Sitter black hole spacetime is a solution of the mimetic $F(R)$ gravity with Lagrange multiplier and potential. As we demonstrate, the resulting mimetic $F(R)$ gravity is a slight modification of the ordinary $F(R)$ gravity case, however th... |
2108.06865 | Jianbo Lu | Jianbo Lu, Yongxin Guo, Guoying Chee | From GR to STG -- Inheritance and development of Einstein's heritages | 29 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A review of General Relativity, Teleparallel Gravity, and Symmetric
Teleparallel gravity is given in this paper. By comparing these theories some
conclusions are obtained. It is argued that the essence of gravity is the
translation connection. The gauge group associated with gravity is merely the
translation group. L... | [
{
"created": "Mon, 16 Aug 2021 02:48:55 GMT",
"version": "v1"
}
] | 2021-08-23 | [
[
"Lu",
"Jianbo",
""
],
[
"Guo",
"Yongxin",
""
],
[
"Chee",
"Guoying",
""
]
] | A review of General Relativity, Teleparallel Gravity, and Symmetric Teleparallel gravity is given in this paper. By comparing these theories some conclusions are obtained. It is argued that the essence of gravity is the translation connection. The gauge group associated with gravity is merely the translation group. Lor... |
1805.01117 | Viktor T. Toth | J. W. Moffat and V. T. Toth | NGC 1052-DF2 And Modified Gravity (MOG) Without Dark Matter | 4 pages, version accepted for publication in MNRAS Letters | Mon.Not.Roy.Astron.Soc. Letters 482 (2019) L1-L3 | 10.1093/mnrasl/sly176 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We model the velocity dispersion of the ultra-diffuse galaxy NGC 1052-DF2
using Newtonian gravity and modified gravity (MOG). The velocity dispersion
predicted by MOG is higher than the Newtonian gravity prediction, but it is
fully consistent with the observed velocity dispersion that is obtained from
the motion of 1... | [
{
"created": "Thu, 3 May 2018 05:03:21 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Sep 2018 18:10:53 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Sep 2018 04:13:10 GMT",
"version": "v3"
}
] | 2018-11-08 | [
[
"Moffat",
"J. W.",
""
],
[
"Toth",
"V. T.",
""
]
] | We model the velocity dispersion of the ultra-diffuse galaxy NGC 1052-DF2 using Newtonian gravity and modified gravity (MOG). The velocity dispersion predicted by MOG is higher than the Newtonian gravity prediction, but it is fully consistent with the observed velocity dispersion that is obtained from the motion of 10 ... |
0801.3324 | Roberto A. Sussman | Roberto A. Sussman | Quasi-local variables in spherical symmetry: numerical applications to
dark matter and dark energy sources | Final version to appear in Physical Review D. More references added.
20 pages, RevTex 4 style, 8 pdf figures | Phys.Rev.D79:025009,2009 | 10.1103/PhysRevD.79.025009 | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A numerical approach is considered for spherically symmetric spacetimes that
generalize Lemaitre-Tolman-Bondi dust solutions to nonzero pressure ("LTB
spacetimes"). We introduce quasi-local (QL) variables that are covariant LTB
objects satisfying evolution equations of Friedman-Lemaitre-Robertson-Walker
(FLRW) cosmol... | [
{
"created": "Tue, 22 Jan 2008 09:44:07 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jan 2008 22:41:41 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Jan 2008 06:34:52 GMT",
"version": "v3"
},
{
"created": "Tue, 7 Oct 2008 07:40:43 GMT",
"version": "v4"
},
{
"cr... | 2010-05-12 | [
[
"Sussman",
"Roberto A.",
""
]
] | A numerical approach is considered for spherically symmetric spacetimes that generalize Lemaitre-Tolman-Bondi dust solutions to nonzero pressure ("LTB spacetimes"). We introduce quasi-local (QL) variables that are covariant LTB objects satisfying evolution equations of Friedman-Lemaitre-Robertson-Walker (FLRW) cosmolog... |
2308.06532 | Min Zhao | Min Zhao, Meirong Tang, Zhaoyi Xu | Quasinormal modes of dark matter core-black hole spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the galactic core, when the scale of dark matter is small, the
distribution of dark matter is that of a constant density dark matter
core.Considering the case of a supermassive black hole coupled to a constant
density dark matter core, we study the quasinormal modes of the black hole in
the constant density dark m... | [
{
"created": "Sat, 12 Aug 2023 11:26:13 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2024 04:33:09 GMT",
"version": "v2"
}
] | 2024-02-22 | [
[
"Zhao",
"Min",
""
],
[
"Tang",
"Meirong",
""
],
[
"Xu",
"Zhaoyi",
""
]
] | In the galactic core, when the scale of dark matter is small, the distribution of dark matter is that of a constant density dark matter core.Considering the case of a supermassive black hole coupled to a constant density dark matter core, we study the quasinormal modes of the black hole in the constant density dark mat... |
1108.1423 | B. S. Sathyaprakash | B.Sathyaprakash, M.Abernathy, F.Acernese, P.Amaro-Seoane, N.Andersson,
K.Arun, F.Barone, B.Barr, M.Barsuglia, M.Beker, N.Beveridge, S.Birindelli,
S.Bose, L.Bosi, S.Braccini, C.Bradaschia, T.Bulik, E.Calloni, G.Cella,
E.Chassande-Mottin, S.Chelkowski, A.Chincarini, J.Clark, E.Coccia,
C.Colacino, J.Colas, A.Cummi... | Scientific Potential of Einstein Telescope | Conforms to conference proceedings, several author names corrected | 2011 Gravitational Waves and Experimental Gravity, eds Etienne
Auge and Jacques Dumarchez and Jean Tran Thanh Van, The Gioi Publishers,
Vietnam | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein gravitational-wave Telescope (ET) is a design study funded by the
European Commission to explore the technological challenges of and scientific
benefits from building a third generation gravitational wave detector. The
three-year study, which concluded earlier this year, has formulated the
conceptual design ... | [
{
"created": "Fri, 5 Aug 2011 22:54:14 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Jun 2012 00:39:30 GMT",
"version": "v2"
}
] | 2012-06-05 | [
[
"Sathyaprakash",
"B.",
""
],
[
"Abernathy",
"M.",
""
],
[
"Acernese",
"F.",
""
],
[
"Amaro-Seoane",
"P.",
""
],
[
"Andersson",
"N.",
""
],
[
"Arun",
"K.",
""
],
[
"Barone",
"F.",
""
],
[
"Barr",
... | Einstein gravitational-wave Telescope (ET) is a design study funded by the European Commission to explore the technological challenges of and scientific benefits from building a third generation gravitational wave detector. The three-year study, which concluded earlier this year, has formulated the conceptual design of... |
gr-qc/0508089 | Dr. Anirudh Pradhan | Anirudh Pradhan, G. S. Khadekar, Vrishali Patki and Saeed Otarod | Kaluza-Klein Type Robertson Walker Cosmological Model With Dynamical
Cosmological Term $\Lambda$ | 16 pages, no figure | Int.J.Theor.Phys.47:1751-1763,2008 | 10.1007/s10773-007-9617-6 | null | gr-qc | null | In this paper we have analyzed the Kaluza-Klein type Robertson Walker (RW)
cosmological models by considering three different forms of variable $\Lambda$:
$\Lambda\sim(\frac{\dot{a}}{a})^2$,$\Lambda\sim(\frac{\ddot{a}} {a})$ and
$\Lambda \sim \rho$. It is found that, the connecting free parameters of the
models with ... | [
{
"created": "Sun, 21 Aug 2005 07:21:36 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Dec 2005 06:28:36 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Khadekar",
"G. S.",
""
],
[
"Patki",
"Vrishali",
""
],
[
"Otarod",
"Saeed",
""
]
] | In this paper we have analyzed the Kaluza-Klein type Robertson Walker (RW) cosmological models by considering three different forms of variable $\Lambda$: $\Lambda\sim(\frac{\dot{a}}{a})^2$,$\Lambda\sim(\frac{\ddot{a}} {a})$ and $\Lambda \sim \rho$. It is found that, the connecting free parameters of the models with co... |
2204.00906 | Mehrdad Farhoudi Prof. | Maryam Shiravand, Saeed Fakhry and Mehrdad Farhoudi | Cosmological Inflation in f(Q, T) Gravity | revised 18 pages, a few figures, references added | Physics of the Dark Universe Volume 37 (2022) 101106 | 10.1016/j.dark.2022.101106 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological inflation within the context of f(Q, T) gravity,
wherein Q is the nonmetricity scalar and T is the trace of the matter
energy-momentum tensor. By choosing a linear combination of Q and T, we first
analyze the realization of an inflationary scenario driven via the geometrical
effects of the l... | [
{
"created": "Sat, 2 Apr 2022 17:22:18 GMT",
"version": "v1"
},
{
"created": "Sun, 29 May 2022 20:30:52 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Aug 2022 13:53:01 GMT",
"version": "v3"
}
] | 2022-08-30 | [
[
"Shiravand",
"Maryam",
""
],
[
"Fakhry",
"Saeed",
""
],
[
"Farhoudi",
"Mehrdad",
""
]
] | We study the cosmological inflation within the context of f(Q, T) gravity, wherein Q is the nonmetricity scalar and T is the trace of the matter energy-momentum tensor. By choosing a linear combination of Q and T, we first analyze the realization of an inflationary scenario driven via the geometrical effects of the lin... |
1405.6319 | Xavier Roy | Xavier Roy | On the 1+3 Formalism in General Relativity | 35 pages. Submitted | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present in this paper the formalism for the splitting of a
four-dimensional Lorentzian manifold by a set of time-like integral curves.
Introducing the geometrical tensors characterizing the local spatial frames
induced by the congruence (namely, the spatial metric tensor, the extrinsic
curvature tensor and the Rie... | [
{
"created": "Sat, 24 May 2014 16:48:35 GMT",
"version": "v1"
}
] | 2014-05-27 | [
[
"Roy",
"Xavier",
""
]
] | We present in this paper the formalism for the splitting of a four-dimensional Lorentzian manifold by a set of time-like integral curves. Introducing the geometrical tensors characterizing the local spatial frames induced by the congruence (namely, the spatial metric tensor, the extrinsic curvature tensor and the Riema... |
gr-qc/9906059 | J. Madore | J. Madore | Noncommutative Geometry for Pedestrians | Lecture given at the International School of Gravitation, Erice, 28
pages, Latex | null | null | LMU-TPW 99-11 | gr-qc | null | A short historical review is made of some recent literature in the field of
noncommutative geometry, especially the efforts to add a gravitational field to
noncommutative models of space-time and to use it as an ultraviolet regulator.
An extensive bibliography has been added containing reference to recent review
arti... | [
{
"created": "Wed, 16 Jun 1999 09:38:45 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Jul 1999 14:45:20 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Madore",
"J.",
""
]
] | A short historical review is made of some recent literature in the field of noncommutative geometry, especially the efforts to add a gravitational field to noncommutative models of space-time and to use it as an ultraviolet regulator. An extensive bibliography has been added containing reference to recent review articl... |
gr-qc/9811025 | Marco Cavagli\`a | Marco Cavaglia | Approximate Canonical Quantization for Cosmological Models | 16 pages, Latex, accepted for publication in Int. Jou. Mod. Phys. D | Int.J.Mod.Phys. D8 (1999) 101 | 10.1142/S0218271899000092 | null | gr-qc hep-th | null | In cosmology minisuperspace models are described by nonlinear
time-reparametrization invariant systems with a finite number of degrees of
freedom. Often these models are not explicitly integrable and cannot be
quantized exactly. Having this in mind, we present a scheme for the
(approximate) quantization of perturbed,... | [
{
"created": "Mon, 9 Nov 1998 13:57:32 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Cavaglia",
"Marco",
""
]
] | In cosmology minisuperspace models are described by nonlinear time-reparametrization invariant systems with a finite number of degrees of freedom. Often these models are not explicitly integrable and cannot be quantized exactly. Having this in mind, we present a scheme for the (approximate) quantization of perturbed, n... |
1908.08735 | Albert Huber | Albert Huber | Junction Conditions and local Spacetimes in General Relativity | 36 pages, matches published version | EPJC 80(12):1132 (2020) | 10.1140/epjc/s10052-020-08714-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, a theoretical framework focussing on local geometric
deformations is introduced in order to cope with the problem of how to join
spacetimes with different geometries and physical properties. Using this
framework, it is shown that two Lorentzian manifolds can be matched in
agreement with the well-... | [
{
"created": "Fri, 23 Aug 2019 09:39:35 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jan 2020 22:42:16 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Jun 2020 17:24:37 GMT",
"version": "v3"
},
{
"created": "Fri, 18 Dec 2020 21:03:06 GMT",
"version": "v4"
}
] | 2020-12-22 | [
[
"Huber",
"Albert",
""
]
] | In the present work, a theoretical framework focussing on local geometric deformations is introduced in order to cope with the problem of how to join spacetimes with different geometries and physical properties. Using this framework, it is shown that two Lorentzian manifolds can be matched in agreement with the well-kn... |
1911.03570 | Milko Estrada | Rodrigo Aros and Milko Estrada and Pablo Pereira | An alternative study about the geometry and the first law of
thermodynamics for AdS Lovelock gravity, using the definition of conserved
charges | null | Entropy 2022, 24(9), 1197 | 10.3390/e24091197 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work it is introduced an extension of the study of the first law of
thermodynamics of black holes based on the geometry of the extended phase space
for AdS Lovelock gravities which includes changes of scales. As expected, the
result obtained coincides with the previously known four dimensional case.
For hig... | [
{
"created": "Fri, 8 Nov 2019 22:46:18 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 2020 00:14:41 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Nov 2020 16:14:39 GMT",
"version": "v3"
},
{
"created": "Thu, 25 Aug 2022 02:32:25 GMT",
"version": "v4"
}
] | 2022-08-31 | [
[
"Aros",
"Rodrigo",
""
],
[
"Estrada",
"Milko",
""
],
[
"Pereira",
"Pablo",
""
]
] | In this work it is introduced an extension of the study of the first law of thermodynamics of black holes based on the geometry of the extended phase space for AdS Lovelock gravities which includes changes of scales. As expected, the result obtained coincides with the previously known four dimensional case. For higher ... |
1212.0422 | Neelima Kelkar Dr | D. Batic, N. G. Kelkar, M. Nowakowski | Orbiting phenomena in black hole scattering | null | Phys. Rev. D 86, 104060 (2012) | 10.1103/PhysRevD.86.104060 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rainbow, glory and orbiting scattering are usually described by the
properties of the classical deflection function related to the real part of the
quantum mechanical scattering phase shift or by the diffractive pattern of the
quantum mechanical cross sections. Here we show that the case of orbiting
scattering of mas... | [
{
"created": "Mon, 3 Dec 2012 15:52:35 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Batic",
"D.",
""
],
[
"Kelkar",
"N. G.",
""
],
[
"Nowakowski",
"M.",
""
]
] | Rainbow, glory and orbiting scattering are usually described by the properties of the classical deflection function related to the real part of the quantum mechanical scattering phase shift or by the diffractive pattern of the quantum mechanical cross sections. Here we show that the case of orbiting scattering of massl... |
gr-qc/9509035 | Jacques Legare | J. Legare and J. W. Moffat | Geodesic and Path Motion in the Nonsymmetric Gravitational Theory | 17 pages, REVTeX 3.0 with amssymb.sty | Gen.Rel.Grav.28:1221-1249,1996 | 10.1007/BF02107382 | UTPT-95-19 | gr-qc | null | We study the problem of test-particle motion in the Nonsymmetric
Gravitational Theory (NGT) assuming the four-velocity of the particle is
parallel-transported along the trajectory. The predicted motion is studied on a
static, spherically symmetric background field, with particular attention paid
to radial and circula... | [
{
"created": "Thu, 21 Sep 1995 13:44:53 GMT",
"version": "v1"
}
] | 2011-02-21 | [
[
"Legare",
"J.",
""
],
[
"Moffat",
"J. W.",
""
]
] | We study the problem of test-particle motion in the Nonsymmetric Gravitational Theory (NGT) assuming the four-velocity of the particle is parallel-transported along the trajectory. The predicted motion is studied on a static, spherically symmetric background field, with particular attention paid to radial and circular ... |
2003.13472 | Seyed Hossein Hendi Dr. | S. N. Sajadi, N. Riazi and S. H. Hendi | Dynamical and Thermal Stabilities of Nonlinearly Charged AdS Black Holes | 17 pages with 15 captioned figures. Published in EPJC | Eur. Phys. J. C 79 (2019) 775 | 10.1140/epjc/s10052-019-7272-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study an extended phase space thermodynamics of a
nonlinearly charged AdS black hole. We examine both the local and global
stabilities, and possible phase transition of the black hole solutions.
Finally, we compute quasi-normal modes via scalar perturbations and compare the
obtained results with tho... | [
{
"created": "Fri, 27 Mar 2020 13:31:28 GMT",
"version": "v1"
}
] | 2020-03-31 | [
[
"Sajadi",
"S. N.",
""
],
[
"Riazi",
"N.",
""
],
[
"Hendi",
"S. H.",
""
]
] | In this paper, we study an extended phase space thermodynamics of a nonlinearly charged AdS black hole. We examine both the local and global stabilities, and possible phase transition of the black hole solutions. Finally, we compute quasi-normal modes via scalar perturbations and compare the obtained results with those... |
2310.17208 | Georgios Pastras | Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras and
Nikolaos Tetradis | Entanglement in Cosmology | 21 pages, 4 figures. v2: references added. v3: version published in
JCAP | null | null | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the evolution of the entanglement entropy for a massless field
within a spherical region throughout the inflationary period and the subsequent
era of radiation domination, starting from the Bunch-Davies vacuum. In order to
focus on the entanglement of modes that are directly accessible to
observations, we ... | [
{
"created": "Thu, 26 Oct 2023 07:50:20 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Nov 2023 17:39:32 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Mar 2024 11:36:59 GMT",
"version": "v3"
}
] | 2024-03-26 | [
[
"Boutivas",
"Konstantinos",
""
],
[
"Katsinis",
"Dimitrios",
""
],
[
"Pastras",
"Georgios",
""
],
[
"Tetradis",
"Nikolaos",
""
]
] | We compute the evolution of the entanglement entropy for a massless field within a spherical region throughout the inflationary period and the subsequent era of radiation domination, starting from the Bunch-Davies vacuum. In order to focus on the entanglement of modes that are directly accessible to observations, we im... |
2312.08352 | Brad Cownden | Brad Cownden, Christiana Pantelidou, Miguel Zilh\~ao | The pseudospectra of black holes in AdS | 38 pages, 13 figures V3: Updated to match the published version in
JHEP | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the stability of quasinormal modes (QNMs) in electrically charged
black brane spacetimes that asymptote to AdS by means of the pseudospectrum.
Methodologically, we adopt ingoing Eddington-Finkelstein coordinates to cast
QNMs in terms of a generalised eigenvalue problem involving a non-selfadjoint
operator; t... | [
{
"created": "Wed, 13 Dec 2023 18:41:53 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Feb 2024 11:20:19 GMT",
"version": "v2"
},
{
"created": "Tue, 21 May 2024 13:22:56 GMT",
"version": "v3"
}
] | 2024-05-22 | [
[
"Cownden",
"Brad",
""
],
[
"Pantelidou",
"Christiana",
""
],
[
"Zilhão",
"Miguel",
""
]
] | We study the stability of quasinormal modes (QNMs) in electrically charged black brane spacetimes that asymptote to AdS by means of the pseudospectrum. Methodologically, we adopt ingoing Eddington-Finkelstein coordinates to cast QNMs in terms of a generalised eigenvalue problem involving a non-selfadjoint operator; thi... |
2205.13580 | Sophie Hourihane | Sophie Hourihane, Katerina Chatziioannou, Marcella Wijngaarden, Derek
Davis, Tyson Littenberg, Neil Cornish | Accurate modeling and mitigation of overlapping signals and glitches in
gravitational-wave data | 26 pages, 25 figures, 7 tables, updating after acceptance to PRD | Phys. Rev. D 106, 042006 15 August 2022 | 10.1103/PhysRevD.106.042006 | P2200160 | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The increasing sensitivity of gravitational-wave detectors has brought about
an increase in the rate of astrophysical signal detections as well as the rate
of "glitches"; transient and non-Gaussian detector noise. Temporal overlap of
signals and glitches in the detector presents a challenge for inference
analyses tha... | [
{
"created": "Thu, 26 May 2022 18:46:14 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Aug 2022 03:30:28 GMT",
"version": "v2"
}
] | 2022-08-18 | [
[
"Hourihane",
"Sophie",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Wijngaarden",
"Marcella",
""
],
[
"Davis",
"Derek",
""
],
[
"Littenberg",
"Tyson",
""
],
[
"Cornish",
"Neil",
""
]
] | The increasing sensitivity of gravitational-wave detectors has brought about an increase in the rate of astrophysical signal detections as well as the rate of "glitches"; transient and non-Gaussian detector noise. Temporal overlap of signals and glitches in the detector presents a challenge for inference analyses that ... |
0804.1328 | Dragoljub Dimitrijevi\'c | D. D. Dimitrijevic, G. S. Djordjevic and Lj. Nesic | Quantum Cosmology and Tachyons | 10 pages, no figures | Fortsch.Phys.56:412-417,2008 | 10.1002/prop.200710513 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the relevance of the classical and quantum rolling tachyons
inflation in the frame of the standard, p-adic and adelic minisuperspace
quantum cosmology. The field theory of tachyon matter proposed by Sen in a
zero-dimensional version suggested by Kar leads to a model of a particle moving
in a constant exter... | [
{
"created": "Tue, 8 Apr 2008 17:01:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Dimitrijevic",
"D. D.",
""
],
[
"Djordjevic",
"G. S.",
""
],
[
"Nesic",
"Lj.",
""
]
] | We discuss the relevance of the classical and quantum rolling tachyons inflation in the frame of the standard, p-adic and adelic minisuperspace quantum cosmology. The field theory of tachyon matter proposed by Sen in a zero-dimensional version suggested by Kar leads to a model of a particle moving in a constant externa... |
2005.13307 | Patryk Mach | Adam Cie\'slik, Patryk Mach | Accretion of the Vlasov gas on Reissner-Nordstr\"{o}m black holes | 22 pages, 22 figures | Phys. Rev. D 102, 024032 (2020) | 10.1103/PhysRevD.102.024032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate stationary spherically symmetric accretion of the relativistic
Vlasov gas on Reissner-Nordstr\"{o}m black holes. The model is based on a
recent analysis done by Rioseco and Sarbach for the Schwarzschild spacetime.
Both models share many common features: The gas characterized by the
Maxwell-J\"{u}ttner ... | [
{
"created": "Wed, 27 May 2020 12:09:27 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Cieślik",
"Adam",
""
],
[
"Mach",
"Patryk",
""
]
] | We investigate stationary spherically symmetric accretion of the relativistic Vlasov gas on Reissner-Nordstr\"{o}m black holes. The model is based on a recent analysis done by Rioseco and Sarbach for the Schwarzschild spacetime. Both models share many common features: The gas characterized by the Maxwell-J\"{u}ttner di... |
gr-qc/0601046 | Nicolas Yunes | Nicolas Yunes (1) and Wolfgang Tichy (2) ((1) Penn State University,
(2) Florida Atlantic University) | Improved initial data for black hole binaries by asymptotic matching of
post-Newtonian and perturbed black hole solutions | 25 pages, 21 figures. Replaced with accepted version | Phys.Rev. D74 (2006) 064013 | 10.1103/PhysRevD.74.064013 | IGPG-06/1-1 | gr-qc | null | We construct approximate initial data for non-spinning black hole binary
systems by asymptotically matching the 4-metrics of two tidally perturbed
Schwarzschild solutions in isotropic coordinates to a resummed post-Newtonian
4-metric in ADMTT coordinates. The specific matching procedure used here
closely follows the ... | [
{
"created": "Wed, 11 Jan 2006 23:29:50 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Sep 2006 20:26:13 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Yunes",
"Nicolas",
""
],
[
"Tichy",
"Wolfgang",
""
]
] | We construct approximate initial data for non-spinning black hole binary systems by asymptotically matching the 4-metrics of two tidally perturbed Schwarzschild solutions in isotropic coordinates to a resummed post-Newtonian 4-metric in ADMTT coordinates. The specific matching procedure used here closely follows the ca... |
2201.02473 | Abhik Kumar Sanyal Dr. | Dalia Saha and Abhik Kumar Sanyal | Inflation -- a Comparative Study Amongst Different Modified Gravity
Theories | 21 Pages, 0 figures | Indian Journal of Theoretical Physics, Volume 68, Nos. 3,4, pages
53-98 (2020), ISSN: 0019-5693 | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the recent years, a host of modified gravity models have been proposed as
alternatives to the dark energy. A quantum theory of gravity also requires to
modify `General Theory of Relativity'. In the present article, we consider five
different modified theories of gravity, and compare inflationary parameters
with re... | [
{
"created": "Fri, 7 Jan 2022 14:46:48 GMT",
"version": "v1"
}
] | 2022-01-10 | [
[
"Saha",
"Dalia",
""
],
[
"Sanyal",
"Abhik Kumar",
""
]
] | In the recent years, a host of modified gravity models have been proposed as alternatives to the dark energy. A quantum theory of gravity also requires to modify `General Theory of Relativity'. In the present article, we consider five different modified theories of gravity, and compare inflationary parameters with rece... |
gr-qc/0112038 | Abhay Ashtekar | Abhay Ashtekar | Quantum Geometry and Gravity: Recent Advances | 24 pages, 2 figures; report of the plenary talk at the 16th
International Conference on General Relativity and Gravitation, held at
Durban, S. Africa in July 2001 | null | 10.1142/9789812776556_0002 | CGPG-11-4 | gr-qc hep-th | null | Over the last three years, a number of fundamental physical issues were
addressed in loop quantum gravity. These include: A statistical mechanical
derivation of the horizon entropy, encompassing astrophysically interesting
black holes as well as cosmological horizons; a natural resolution of the
big-bang singularity;... | [
{
"created": "Mon, 17 Dec 2001 16:55:16 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Ashtekar",
"Abhay",
""
]
] | Over the last three years, a number of fundamental physical issues were addressed in loop quantum gravity. These include: A statistical mechanical derivation of the horizon entropy, encompassing astrophysically interesting black holes as well as cosmological horizons; a natural resolution of the big-bang singularity; t... |
2103.11157 | De-Chang Dai | De-Chang Dai | Variance of Newtonian constant from local gravitational acceleration
measurements | 5 pages, 5 figures, accepted by PRD | null | 10.1103/PhysRevD.103.064059 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We use IGETS absolute gravitational acceleration measurement data to study
the gravitational acceleration variance. The relative variance of $\delta g /g$
in 22 years is less than $4\times 10^{-8}$. Since $\delta G /G\lessapprox\delta
g /g $, this implies the relative variance of Newtonian constant is less than
$3\ti... | [
{
"created": "Sat, 20 Mar 2021 11:28:08 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Dai",
"De-Chang",
""
]
] | We use IGETS absolute gravitational acceleration measurement data to study the gravitational acceleration variance. The relative variance of $\delta g /g$ in 22 years is less than $4\times 10^{-8}$. Since $\delta G /G\lessapprox\delta g /g $, this implies the relative variance of Newtonian constant is less than $3\time... |
gr-qc/0307035 | Hajime Sotani | Hajime Sotani, Tomohiro Harada | Nonradial oscillations of quark stars | 13 pages, 6 figures, accepted for publication in Phys.Rev.D | Phys.Rev. D68 (2003) 024019 | 10.1103/PhysRevD.68.024019 | null | gr-qc | null | Recently, it has been reported that a candidate for a quark star may have
been observed. In this article, we pay attention to quark stars with radiation
radii in the reported range. We calculate nonradial oscillations of $f$-, $w$-
and $w_{\rm II}$-modes. Then, we find that the dependence of the $f$-mode
quasi-normal... | [
{
"created": "Wed, 9 Jul 2003 07:26:06 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Sotani",
"Hajime",
""
],
[
"Harada",
"Tomohiro",
""
]
] | Recently, it has been reported that a candidate for a quark star may have been observed. In this article, we pay attention to quark stars with radiation radii in the reported range. We calculate nonradial oscillations of $f$-, $w$- and $w_{\rm II}$-modes. Then, we find that the dependence of the $f$-mode quasi-normal f... |
2201.03792 | Kazuharu Bamba | Z. Yousaf, Kazuharu Bamba, M. Z. Bhatti and U. Farwa | Quasi Static Evolution of Compact Objects in Modified Gravity | 26 pages, version accepted for publication in General Relativity and
Gravitation | null | 10.1007/s10714-021-02887-z | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, the quasi static-approximation on the hydrodynamics of compact
objects is proposed in $f(R, T)$ gravity, where $R$ is the scalar curvature and
$T$ is the trace of stress-energy tensor, by exploring the axial and reflection
symmetric space time stuffed with anisotropic and dissipative matter contents.
T... | [
{
"created": "Tue, 11 Jan 2022 05:53:55 GMT",
"version": "v1"
}
] | 2022-01-12 | [
[
"Yousaf",
"Z.",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Bhatti",
"M. Z.",
""
],
[
"Farwa",
"U.",
""
]
] | In this paper, the quasi static-approximation on the hydrodynamics of compact objects is proposed in $f(R, T)$ gravity, where $R$ is the scalar curvature and $T$ is the trace of stress-energy tensor, by exploring the axial and reflection symmetric space time stuffed with anisotropic and dissipative matter contents. The... |
0901.3638 | Kouji Nakamura | Kouji Nakamura | Consistency relations between the source terms in the second-order
Einstein equations for cosmological perturbations | 4 pages, no figure, Prepared for the proceedings of the international
conference JGRG18 (2008), Hiroshima, Japan | null | null | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In addition to the second-order Einstein equations on four-dimensional
homogeneous isotropic background universe filled with the single perfect fluid,
we also derived the second-order perturbations of the continuity equation and
the Euler equation for a perfect fluid in gauge-invariant manner without
ignoring any mod... | [
{
"created": "Fri, 23 Jan 2009 09:58:41 GMT",
"version": "v1"
}
] | 2009-01-27 | [
[
"Nakamura",
"Kouji",
""
]
] | In addition to the second-order Einstein equations on four-dimensional homogeneous isotropic background universe filled with the single perfect fluid, we also derived the second-order perturbations of the continuity equation and the Euler equation for a perfect fluid in gauge-invariant manner without ignoring any mode ... |
2005.08437 | Daniel Flores | Daniel Flores-Alfonso, Bryan O. Larios | Meronic AdS Black Holes in Gauss-Bonnet Theory | 8 figures | Phys. Rev. D 102, 064017 (2020) | 10.1103/PhysRevD.102.064017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine analytical, intrinsically non-Abelian, black holes with SU(2)
Yang-Mills matter content. Working in the extended thermodynamics scenario of
Lovelock black holes we study the phase structure of a four and a
five-dimensional spherically symmetric configuration. We work in
Gauss-Bonnet-Einstein-Yang-Mills gra... | [
{
"created": "Mon, 18 May 2020 03:16:36 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Oct 2020 21:43:06 GMT",
"version": "v2"
}
] | 2020-10-12 | [
[
"Flores-Alfonso",
"Daniel",
""
],
[
"Larios",
"Bryan O.",
""
]
] | We examine analytical, intrinsically non-Abelian, black holes with SU(2) Yang-Mills matter content. Working in the extended thermodynamics scenario of Lovelock black holes we study the phase structure of a four and a five-dimensional spherically symmetric configuration. We work in Gauss-Bonnet-Einstein-Yang-Mills gravi... |
1601.07475 | Fethi M. Ramazanoglu | Fethi M. Ramazano\u{g}lu, Frans Pretorius | Spontaneous Scalarization with Massive Fields | null | Phys. Rev. D 93, 064005 (2016) | 10.1103/PhysRevD.93.064005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of a mass term in the spontaneous scalarization of
neutron stars, for a wide range of scalar field parameters and neutron star
equations of state. Even though massless scalars have been the focus of
interest in spontaneous scalarization so far, recent observations of binary
systems rule out most o... | [
{
"created": "Wed, 27 Jan 2016 18:08:09 GMT",
"version": "v1"
}
] | 2016-03-09 | [
[
"Ramazanoğlu",
"Fethi M.",
""
],
[
"Pretorius",
"Frans",
""
]
] | We study the effect of a mass term in the spontaneous scalarization of neutron stars, for a wide range of scalar field parameters and neutron star equations of state. Even though massless scalars have been the focus of interest in spontaneous scalarization so far, recent observations of binary systems rule out most of ... |
1904.07156 | Asya Aminova | Asya V. Aminova and Mikhail Kh. Lyulinsky | Non-vanishing cosmological constant effect in super-Poincare-invariant
Universe | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In \cite{AminMoc} we defined the Minkowski superspace $SM(4,4\vert \lambda,
\mu)$ as the invariant of the Poincare supergroup of supertransformations,
which is a solution of Killing superequations.
In the present paper we use formulae of super-Riemannian geometry developed
by V.~P. Akulov and D.~V. Volkov \cite{AkV... | [
{
"created": "Mon, 15 Apr 2019 16:12:17 GMT",
"version": "v1"
}
] | 2019-04-16 | [
[
"Aminova",
"Asya V.",
""
],
[
"Lyulinsky",
"Mikhail Kh.",
""
]
] | In \cite{AminMoc} we defined the Minkowski superspace $SM(4,4\vert \lambda, \mu)$ as the invariant of the Poincare supergroup of supertransformations, which is a solution of Killing superequations. In the present paper we use formulae of super-Riemannian geometry developed by V.~P. Akulov and D.~V. Volkov \cite{AkVolk}... |
2112.03686 | Bivudutta Mishra Dr. | Santosh V. Lohakare, S.K. Tripathy, B. Mishra | Cosmological model with time varying deceleration parameter in $F(R,G)$
gravity | 11 pages, 9 figures. Accepted version in Physica Scripta | Phys. Scr. 96 (2021) 125039 | 10.1088/1402-4896/ac40d6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the dynamical behaviour of the Universe in the
$F(R,G)$ theory of gravity, where $R$ and $G$ respectively denote the Ricci
scalar and Gauss-Bonnet invariant. Our wide analysis encompasses the energy
conditions, cosmographic parameters, $Om(z)$ diagnostic, stability and the
viability of reconst... | [
{
"created": "Mon, 6 Dec 2021 06:29:26 GMT",
"version": "v1"
}
] | 2022-04-22 | [
[
"Lohakare",
"Santosh V.",
""
],
[
"Tripathy",
"S. K.",
""
],
[
"Mishra",
"B.",
""
]
] | In this paper, we study the dynamical behaviour of the Universe in the $F(R,G)$ theory of gravity, where $R$ and $G$ respectively denote the Ricci scalar and Gauss-Bonnet invariant. Our wide analysis encompasses the energy conditions, cosmographic parameters, $Om(z)$ diagnostic, stability and the viability of reconstru... |
gr-qc/9411070 | Marco Cavaglia' Sez. di Torino | Marco Cavaglia`, Vittorio de Alfaro and Alexandre T. Filippov | Hamiltonian Formalism for Black Holes and Quantization | 13 pages, Plain Tex, no figures, Mail Adrress: Dipartimento di Fisica
Teorica dell'Universita` di Torino, Via Giuria 1, I-10125 Torino, Italy; TWO
REFERENCES ADDED | Int.J.Mod.Phys. D4 (1995) 661-672 | 10.1142/S0218271895000442 | DFTT 64/94 | gr-qc hep-th | null | Starting from the Lagrangian formulation of the Einstein equations for the
vacuum static spherically symmetric metric, we develop a canonical formalism in
the radial variable $r$ that is time--like inside the Schwarzschild horizon.
The Schwarzschild mass turns out to be represented by a canonical function that
commut... | [
{
"created": "Tue, 29 Nov 1994 17:18:38 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Dec 1994 17:16:50 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Cavaglia`",
"Marco",
""
],
[
"de Alfaro",
"Vittorio",
""
],
[
"Filippov",
"Alexandre T.",
""
]
] | Starting from the Lagrangian formulation of the Einstein equations for the vacuum static spherically symmetric metric, we develop a canonical formalism in the radial variable $r$ that is time--like inside the Schwarzschild horizon. The Schwarzschild mass turns out to be represented by a canonical function that commutes... |
1510.02946 | Xue-Mei Deng | Xue-Mei Deng and Yi Xie | Improved upper bounds on Kaluza-Klein gravity with current Solar System
experiments and observations | 8 pages | The European Physical Journal C, November 2015, 75:539 | 10.1140/epjc/s10052-015-3771-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As an extension of previous works on classical tests of Kaluza-Klein (KK)
gravity and as an attempt to find more stringent constraints on this theory,
its effects on physical experiments and astronomical observations conducted in
the Solar System are studied. We investigate the gravitational time delay at
inferior co... | [
{
"created": "Sat, 10 Oct 2015 14:50:38 GMT",
"version": "v1"
}
] | 2015-11-24 | [
[
"Deng",
"Xue-Mei",
""
],
[
"Xie",
"Yi",
""
]
] | As an extension of previous works on classical tests of Kaluza-Klein (KK) gravity and as an attempt to find more stringent constraints on this theory, its effects on physical experiments and astronomical observations conducted in the Solar System are studied. We investigate the gravitational time delay at inferior conj... |
2004.04773 | Anzhong Wang | Kai Lin, Shaojun Zhang, Chao Zhang, Xiang Zhao, Bin Wang, and Anzhong
Wang | No static regular black holes in Einstein-complex-scalar-Gauss-Bonnet
gravity | revtex4, no figures and tables. Version to appear in Phys. Rev. D | Phys. Rev. D 102, 024034 (2020) | 10.1103/PhysRevD.102.024034 | null | gr-qc astro-ph.GA hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief report, we investigate the existence of 4-dimensional static
spherically symmetric black holes (BHs) in the
Einstein-complex-scalar-Gauss-Bonnet (EcsGB) gravity with an arbitrary
potential $V(\phi)$ and a coupling $f(\phi)$ between the scalar field $\phi$
and the Gauss-Bonnet (GB) term. We find that sta... | [
{
"created": "Thu, 9 Apr 2020 19:01:01 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2020 20:39:22 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Lin",
"Kai",
""
],
[
"Zhang",
"Shaojun",
""
],
[
"Zhang",
"Chao",
""
],
[
"Zhao",
"Xiang",
""
],
[
"Wang",
"Bin",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this brief report, we investigate the existence of 4-dimensional static spherically symmetric black holes (BHs) in the Einstein-complex-scalar-Gauss-Bonnet (EcsGB) gravity with an arbitrary potential $V(\phi)$ and a coupling $f(\phi)$ between the scalar field $\phi$ and the Gauss-Bonnet (GB) term. We find that stati... |
1001.2702 | Alessandro Di Mare | Alessandro Di Mare and Daniele Oriti | Emergent matter from 3d generalised group field theories | 14 pages, 1 figure, RevTex4, v2 | Class.Quant.Grav.27:145006,2010 | 10.1088/0264-9381/27/14/145006 | AEI-2009-126 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We identify classical solutions of a generalised group field theory model in
3 dimensions, and study the corresponding perturbations, deriving their
effective dynamics. We discuss their interpretation as emergent matter fields.
This allows us, on the one hand to test the proposed mechanism for emergence of
matter as ... | [
{
"created": "Fri, 15 Jan 2010 14:42:14 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jan 2010 13:32:06 GMT",
"version": "v2"
}
] | 2012-03-27 | [
[
"Di Mare",
"Alessandro",
""
],
[
"Oriti",
"Daniele",
""
]
] | We identify classical solutions of a generalised group field theory model in 3 dimensions, and study the corresponding perturbations, deriving their effective dynamics. We discuss their interpretation as emergent matter fields. This allows us, on the one hand to test the proposed mechanism for emergence of matter as a ... |
gr-qc/0401033 | Pieter-Jan De Smet | Pieter-Jan De Smet | The Petrov type of the BMPV metric | 6 pages, 2 figures | Gen.Rel.Grav. 37 (2005) 237-242 | 10.1007/s10714-005-0013-3 | YITP-SB-03-66 | gr-qc hep-th | null | We show that the BMPV metric has Petrov type 22. This means that the BMPV
metric is less algebraically special than the five-dimensional Schwarzschild
metric, which has Petrov type \underline{22}.
| [
{
"created": "Fri, 9 Jan 2004 16:50:10 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"De Smet",
"Pieter-Jan",
""
]
] | We show that the BMPV metric has Petrov type 22. This means that the BMPV metric is less algebraically special than the five-dimensional Schwarzschild metric, which has Petrov type \underline{22}. |
2403.12439 | Saurabh Kumar | Saurabh Kumar, Akhil Uniyal, and Sayan Chakrabarti | Observational signatures of Rotating compact objects in Plasma
space-time | null | Phys.Dark Univ. 44 (2024) 101472 | 10.1016/j.dark.2024.101472 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have investigated the characteristics of shadows cast by the Kerr black
hole in the presence of plasma and compared them to those of a rotating
wormhole in a uniform plasma space-time for an observer at infinity.
Interestingly, for the same uniform plasma density, the apparent shadow size of
the rotating wormhole ... | [
{
"created": "Tue, 19 Mar 2024 04:54:20 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 13:49:52 GMT",
"version": "v2"
}
] | 2024-04-03 | [
[
"Kumar",
"Saurabh",
""
],
[
"Uniyal",
"Akhil",
""
],
[
"Chakrabarti",
"Sayan",
""
]
] | We have investigated the characteristics of shadows cast by the Kerr black hole in the presence of plasma and compared them to those of a rotating wormhole in a uniform plasma space-time for an observer at infinity. Interestingly, for the same uniform plasma density, the apparent shadow size of the rotating wormhole is... |
2106.06540 | Dr. Sudhaker Upadhyay | Abdul W. Khanday, Sudhaker Upadhyay and Prince A. Ganai | Galactic Clustering Under Power-law Modified Newtonian Potential | 14 pages, 15 captioned figures | General Relativity and Gravitation 53 (2021) 58 | 10.1007/s10714-021-02832-0 | null | gr-qc astro-ph.CO astro-ph.GA hep-th | http://creativecommons.org/licenses/by/4.0/ | We estimate galaxy clustering under a modified gravitational potential. In
particular, the modifications in gravitational potential energy occur due to a
power-law and cosmological constant terms. We derive a canonical partition
function for the system of galaxies interacting under such a modified
gravitational poten... | [
{
"created": "Sat, 12 Jun 2021 10:57:00 GMT",
"version": "v1"
}
] | 2021-06-15 | [
[
"Khanday",
"Abdul W.",
""
],
[
"Upadhyay",
"Sudhaker",
""
],
[
"Ganai",
"Prince A.",
""
]
] | We estimate galaxy clustering under a modified gravitational potential. In particular, the modifications in gravitational potential energy occur due to a power-law and cosmological constant terms. We derive a canonical partition function for the system of galaxies interacting under such a modified gravitational potenti... |
1503.08344 | N\'estor Ortiz | N\'estor Ortiz, Olivier Sarbach, Thomas Zannias | On the behaviour of non-radial null geodesics in self-similar
Tolman-Bondi collapse | 12 pages, 4 figures. Prepared for the proceedings of the workshop to
pay homage to Victor Manuel Villanueva Sandoval. Morelia, M\'exico, December
2013 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent work on the structure of the singularity in inhomogeneous
Tolman-Bondi collapse models, we investigate the behaviour of null geodesics in
the particular case where the collapse is self-similar. The presence of the
homothetic Killing vector field implies that the geodesic equation can be
described ... | [
{
"created": "Sat, 28 Mar 2015 20:34:36 GMT",
"version": "v1"
}
] | 2015-03-31 | [
[
"Ortiz",
"Néstor",
""
],
[
"Sarbach",
"Olivier",
""
],
[
"Zannias",
"Thomas",
""
]
] | Motivated by recent work on the structure of the singularity in inhomogeneous Tolman-Bondi collapse models, we investigate the behaviour of null geodesics in the particular case where the collapse is self-similar. The presence of the homothetic Killing vector field implies that the geodesic equation can be described by... |
1510.01350 | George Chapline F | George Chapline | Leech Lattice Extension of the Non-linear Schrodinger Equation Theory of
Einstein spaces | 20 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although the nonlinear Schrodinger equation description of Einstein spaces
has provided insights into how quantum mechanics might modify the classical
general relativistic description of space-time, an exact quantum description of
space-times with matter has remained elusive. In this note we outline how the
nonlinear... | [
{
"created": "Fri, 2 Oct 2015 00:30:23 GMT",
"version": "v1"
}
] | 2015-10-07 | [
[
"Chapline",
"George",
""
]
] | Although the nonlinear Schrodinger equation description of Einstein spaces has provided insights into how quantum mechanics might modify the classical general relativistic description of space-time, an exact quantum description of space-times with matter has remained elusive. In this note we outline how the nonlinear S... |
1608.03839 | Massimiliano Rinaldi | Massimiliano Rinaldi | Mimicking dark matter in Horndeski gravity | Latex, 21 pages, some color figures. Minor adjustments, version
accepted for publication in Physics of the Dark Universe | Physics of the Dark Universe 16 (2017) 14 | 10.1016/j.dark.2017.02.003 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the rediscovery of Horndeski gravity, a lot of work has been devoted to
the exploration of its properties, especially in the context of dark energy.
However, one sector of this theory, namely the one containing the coupling of
the Einstein tensor to the kinetic term of the scalar field, shows some
surprising fe... | [
{
"created": "Fri, 12 Aug 2016 16:15:50 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Feb 2017 14:55:11 GMT",
"version": "v2"
}
] | 2017-03-02 | [
[
"Rinaldi",
"Massimiliano",
""
]
] | Since the rediscovery of Horndeski gravity, a lot of work has been devoted to the exploration of its properties, especially in the context of dark energy. However, one sector of this theory, namely the one containing the coupling of the Einstein tensor to the kinetic term of the scalar field, shows some surprising feat... |
gr-qc/9903026 | C. Anastopoulos | C. Anastopoulos | Quantum Fields in Nonstatic background: A Histories Perspective | 27 pages, LATEX; minor changes and corrections; version to appear in
JMP | J.Math.Phys.41:617-637,2000 | 10.1063/1.533155 | null | gr-qc hep-th | null | For a quantum field living on a non - static spacetime no instantaneous
Hamiltonian is definable, for this generically necessitates a choice of
inequivalent representation of the canonical commutation relations at each
instant of time. This fact suggests a description in terms of time - dependent
Hilbert spaces, a co... | [
{
"created": "Sun, 7 Mar 1999 22:11:41 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Oct 1999 18:48:10 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Anastopoulos",
"C.",
""
]
] | For a quantum field living on a non - static spacetime no instantaneous Hamiltonian is definable, for this generically necessitates a choice of inequivalent representation of the canonical commutation relations at each instant of time. This fact suggests a description in terms of time - dependent Hilbert spaces, a conc... |
1301.6174 | Oliver Rinne | Oliver Rinne, Vincent Moncrief | Hyperboloidal Einstein-matter evolution and tails for scalar and
Yang-Mills fields | 28 pages, 9 figures. Minor changes to agree with journal version | null | 10.1088/0264-9381/27/3/035014 | AEI-2013-043 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how matter can be included in a constrained ADM-like formulation of
the Einstein equations on constant mean curvature surfaces. Previous results on
the regularity of the equations at future null infinity are unaffected by the
addition of matter with tracefree energy-momentum tensor. Two examples are
studied i... | [
{
"created": "Fri, 25 Jan 2013 21:09:08 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Apr 2013 16:37:23 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Rinne",
"Oliver",
""
],
[
"Moncrief",
"Vincent",
""
]
] | We show how matter can be included in a constrained ADM-like formulation of the Einstein equations on constant mean curvature surfaces. Previous results on the regularity of the equations at future null infinity are unaffected by the addition of matter with tracefree energy-momentum tensor. Two examples are studied in ... |
1308.0373 | Aur\'elien Hees | A. Hees, B. Lamine, C. Le Poncin-Lafitte, P. Wolf | How to test SME with space missions ? | Presented at the Sixth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, June 17-21, 2013. 4 pages, 1 figure | null | 10.1142/9789814566438_0027 | null | gr-qc astro-ph.EP hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this communication, we focus on possibilities to constrain SME
coefficients using Cassini and Messenger data. We present simulations of
radioscience observables within the framework of the SME, identify the linear
combinations of SME coefficients the observations depend on and determine the
sensitivity of these me... | [
{
"created": "Thu, 1 Aug 2013 22:36:25 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Hees",
"A.",
""
],
[
"Lamine",
"B.",
""
],
[
"Poncin-Lafitte",
"C. Le",
""
],
[
"Wolf",
"P.",
""
]
] | In this communication, we focus on possibilities to constrain SME coefficients using Cassini and Messenger data. We present simulations of radioscience observables within the framework of the SME, identify the linear combinations of SME coefficients the observations depend on and determine the sensitivity of these meas... |
gr-qc/0110072 | Nicolas Boulanger | Nicolas Boulanger and Mboyo Esole | A note on the uniqueness of D=4 N=1 Supergravity | 22+1 pages, LaTeX. References added | Class.Quant.Grav. 19 (2002) 2107-2124 | 10.1088/0264-9381/19/8/304 | null | gr-qc hep-th | null | We investigate in 4 spacetime dimensions, all the consistent deformations of
the lagrangian ${\cal L}_2+{\cal L}_{{3/2}}$, which is the sum of the
Pauli-Fierz lagrangian ${\cal L}_2$ for a free massless spin 2 field and the
Rarita-Schwinger lagrangian ${\cal L}_{{3/2}}$ for a free massless spin 3/2
field. Using BRST ... | [
{
"created": "Mon, 15 Oct 2001 13:19:32 GMT",
"version": "v1"
},
{
"created": "Tue, 7 May 2002 06:38:04 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Boulanger",
"Nicolas",
""
],
[
"Esole",
"Mboyo",
""
]
] | We investigate in 4 spacetime dimensions, all the consistent deformations of the lagrangian ${\cal L}_2+{\cal L}_{{3/2}}$, which is the sum of the Pauli-Fierz lagrangian ${\cal L}_2$ for a free massless spin 2 field and the Rarita-Schwinger lagrangian ${\cal L}_{{3/2}}$ for a free massless spin 3/2 field. Using BRST co... |
1612.01084 | Jean-Philippe Uzan | George Ellis, Jean-Philippe Uzan | Causal structures in cosmology | 21 pages, overview for the Acad\'emie des Sciences de Paris,
published in the special volume of the Comptes Rendus de l'Acad\'emie
"Inflation: theoretical and observational status" | Comptes Rendus Physique 16 (2015) 928-947 | 10.1016/j.crhy.2015.07.005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article reviews the properties and limitations associated with the
existence of particle, visual, and event horizons in cosmology in general and
in inflationary universes in particular, carefully distinguishing them from
`Hubble horizons'. It explores to what extent one might be able to probe
conditions beyond t... | [
{
"created": "Sun, 4 Dec 2016 08:14:43 GMT",
"version": "v1"
}
] | 2016-12-06 | [
[
"Ellis",
"George",
""
],
[
"Uzan",
"Jean-Philippe",
""
]
] | This article reviews the properties and limitations associated with the existence of particle, visual, and event horizons in cosmology in general and in inflationary universes in particular, carefully distinguishing them from `Hubble horizons'. It explores to what extent one might be able to probe conditions beyond the... |
gr-qc/9506002 | Robert Graham | Robert Graham, Andras Csordas | Quantum states on supersymmetric minisuperspace with a cosmological
constant | 14 pages, latex | Phys.Rev. D52 (1995) 5653-5658 | 10.1103/PhysRevD.52.5653 | null | gr-qc | null | Spatially homogeneous models in quantum supergravity with a nonvanishing
cosmological constant are studied. A class of exact nontrivial solutions of the
supersymmetry and Lorentz constraints is obtained in terms of the Chern-Simons
action on the spatially homogeneous 3-manifold, both in Ashketar variables
where the s... | [
{
"created": "Thu, 1 Jun 1995 09:09:26 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Graham",
"Robert",
""
],
[
"Csordas",
"Andras",
""
]
] | Spatially homogeneous models in quantum supergravity with a nonvanishing cosmological constant are studied. A class of exact nontrivial solutions of the supersymmetry and Lorentz constraints is obtained in terms of the Chern-Simons action on the spatially homogeneous 3-manifold, both in Ashketar variables where the sol... |
2404.14764 | Yuxuan Shi | Yuxuan Shi | The unstable null circular geodesic features the spherically symmetrical
asymptotically flat black hole | null | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | We analyse the massless particles orbiting a spherically symmetric,
asymptotically flat black hole with a radius equal to the photon sphere and a
circular geodesic. Asymptotic observers record the orbital period of the null
circular geodesic as the lowest among all possible paths around the compact
object. We proceed... | [
{
"created": "Tue, 23 Apr 2024 05:59:51 GMT",
"version": "v1"
}
] | 2024-04-24 | [
[
"Shi",
"Yuxuan",
""
]
] | We analyse the massless particles orbiting a spherically symmetric, asymptotically flat black hole with a radius equal to the photon sphere and a circular geodesic. Asymptotic observers record the orbital period of the null circular geodesic as the lowest among all possible paths around the compact object. We proceed w... |
1808.00266 | Ercan Kilicarslan | Ercan Kilicarslan | Weak Field Limit of Infinite Derivative Gravity | 11 pages, references added, version accepted for publication in PRD | Phys. Rev. D 98, 064048 (2018) | 10.1103/PhysRevD.98.064048 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A form of infinite derivative gravity is free from ghost-like instabilities
with improved small scale behavior. In this theory, we calculate the tree-level
scattering amplitude and the corresponding weak field potential energy between
two localized covariantly conserved spinning point-like sources that also have
velo... | [
{
"created": "Wed, 1 Aug 2018 11:10:24 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Aug 2018 17:43:20 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Sep 2018 12:57:45 GMT",
"version": "v3"
}
] | 2018-10-03 | [
[
"Kilicarslan",
"Ercan",
""
]
] | A form of infinite derivative gravity is free from ghost-like instabilities with improved small scale behavior. In this theory, we calculate the tree-level scattering amplitude and the corresponding weak field potential energy between two localized covariantly conserved spinning point-like sources that also have veloci... |
1201.0137 | Aharon Davidson | Aharon Davidson and Ben Yellin | Two-Sided Gravitational Mirror: Sealing off Curvature Singularities | 4 PRL pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gravitational mirror is a non-singular finite redshift surface which
bounces all incident null geodesics. While a white mirror (outward bouncing)
resembles 't Hooft's brick wall, a black mirror (inward bouncing) offers a
novel mechanism for sealing off curvature singularities. The geometry
underlying a two-sided mi... | [
{
"created": "Fri, 30 Dec 2011 15:12:20 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jan 2012 08:53:51 GMT",
"version": "v2"
}
] | 2012-01-13 | [
[
"Davidson",
"Aharon",
""
],
[
"Yellin",
"Ben",
""
]
] | A gravitational mirror is a non-singular finite redshift surface which bounces all incident null geodesics. While a white mirror (outward bouncing) resembles 't Hooft's brick wall, a black mirror (inward bouncing) offers a novel mechanism for sealing off curvature singularities. The geometry underlying a two-sided mirr... |
1201.0750 | Jackson Levi Said | Jackson Levi Said, Kristian Zarb Adami | Cosmological Effects on Black Hole Formation | 10 pages, 1 figure, submitted | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formation of cosmological black holes is investigated using the
functional Schroedinger equation as observed by an asymptotic observer,
assuming a spherical domain wall collapse process. The mass formula of the
Sultana-Dyer black hole is derived using Israel's domain wall mathematical
framework. This is used to e... | [
{
"created": "Mon, 2 Jan 2012 15:08:25 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2012 19:18:59 GMT",
"version": "v2"
}
] | 2012-02-02 | [
[
"Said",
"Jackson Levi",
""
],
[
"Adami",
"Kristian Zarb",
""
]
] | The formation of cosmological black holes is investigated using the functional Schroedinger equation as observed by an asymptotic observer, assuming a spherical domain wall collapse process. The mass formula of the Sultana-Dyer black hole is derived using Israel's domain wall mathematical framework. This is used to exa... |
1205.4710 | Lawrence Crowell | Lawrence B. Crowell | Tricritical quantum point and inflationary cosmology | This essay received an honorable mention in the 2012 Essay
Competition of the Gravity Research Foundation. submitted to IJMPD | IJMPD vol 21 #11 (2012) | 10.1142/S0218271812420187 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic protection due to inflationary cosmology is a conse- quence
of a quantum tricritical point. In this scenario a closed spacetime solution
transitions into an inflationary de Sitter spacetime. Saturation of the
holographic entropy bound is prevented by the phase change in the topology of
the early unive... | [
{
"created": "Mon, 21 May 2012 02:59:19 GMT",
"version": "v1"
}
] | 2013-05-01 | [
[
"Crowell",
"Lawrence B.",
""
]
] | The holographic protection due to inflationary cosmology is a conse- quence of a quantum tricritical point. In this scenario a closed spacetime solution transitions into an inflationary de Sitter spacetime. Saturation of the holographic entropy bound is prevented by the phase change in the topology of the early univers... |
1309.0351 | Saneesh Sebastian | Saneesh Sebastian and V. C. Kuriakose | Spectroscopy and Thermodynamics of MSW Black Hole | 8 page,3 figure, To appear in MPLA | Mod. Phys. Lett. A, Vol. 28, No. 33 (2013) 1350149 | 10.1142/S0217732313501496 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the thermodynamics and spectroscopy of a 2+1 dimensional black hole
pro- posed by Mandal et. al1 . We put the background space time in Kruskal like
co-ordinate and find period with respect to Euclidean time. Different
thermodynamic quantities like entropy, specific heat, temperature etc are
obtained. The adi... | [
{
"created": "Mon, 2 Sep 2013 10:11:29 GMT",
"version": "v1"
}
] | 2014-02-19 | [
[
"Sebastian",
"Saneesh",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | We study the thermodynamics and spectroscopy of a 2+1 dimensional black hole pro- posed by Mandal et. al1 . We put the background space time in Kruskal like co-ordinate and find period with respect to Euclidean time. Different thermodynamic quantities like entropy, specific heat, temperature etc are obtained. The adiab... |
0710.1866 | Shrirang S. Deshingkar | Shrirang S. Deshingkar | Can we see naked singularities? | 10 pages | Int.J.Mod.Phys.D18:2083-2092,2009 | 10.1142/S0218271809015990 | null | gr-qc astro-ph hep-th | null | We study singularities which can form in a spherically symmetric
gravitational collapse of a general matter field obeying weak energy condition.
We show that no energy can reach an outside observer from a null naked
singularity. That means they will not be a serious threat to the Cosmic
Censorship Conjecture (CCC). F... | [
{
"created": "Tue, 9 Oct 2007 19:50:20 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Oct 2007 22:34:49 GMT",
"version": "v2"
}
] | 2010-02-17 | [
[
"Deshingkar",
"Shrirang S.",
""
]
] | We study singularities which can form in a spherically symmetric gravitational collapse of a general matter field obeying weak energy condition. We show that no energy can reach an outside observer from a null naked singularity. That means they will not be a serious threat to the Cosmic Censorship Conjecture (CCC). For... |
1109.3506 | Dejan Stojkovic | Jonas Mureika and Dejan Stojkovic | Reply to the "Comment on: Detecting Vanishing Dimensions Via Primordial
Gravitational Wave Astronomy" | Accepted for publication in Phys. Rev. Lett | Phys. Rev. Lett. 107, 169002 (2011) | 10.1103/PhysRevLett.107.169002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The "Comment on: Detecting Vanishing Dimensions Via Primordial Gravitational
Wave Astronomy" [arXiv:1104.1223] is misleading and premised on a
misinterpretation of the main content of Phys. Rev. Lett. 106, 101101 (2011)
[arXiv:1102.3434]. The main claim in the comment - that in some exotic theories
different from gen... | [
{
"created": "Thu, 15 Sep 2011 22:49:02 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Mureika",
"Jonas",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | The "Comment on: Detecting Vanishing Dimensions Via Primordial Gravitational Wave Astronomy" [arXiv:1104.1223] is misleading and premised on a misinterpretation of the main content of Phys. Rev. Lett. 106, 101101 (2011) [arXiv:1102.3434]. The main claim in the comment - that in some exotic theories different from gener... |
0905.3622 | Alexander Petrov Nikolaevich | A.N.Petrov | Three types of superpotentials for perturbations in the
Einstein-Gauss-Bonnet gravity | Erratum, where the canonical superpotential and correspondent
formulae are corrected, is added | Class.Quant.Grav.26:135010,2009; Erratum-ibid.27:069801,2010 | 10.1088/0264-9381/26/13/135010 10.1088/0264-9381/27/6/069801 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Superpotentials (antisymmetric tensor densities) in Einstein-Gauss-Bonnet
(EGB) gravity for arbitrary types of perturbations on arbitrary curved
backgrounds are constructed. As a basis, the generalized conservation laws in
the framework of an arbitrary D-dimensional metric theory, where conserved
currents are express... | [
{
"created": "Fri, 22 May 2009 07:45:54 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Nov 2009 19:10:47 GMT",
"version": "v2"
}
] | 2010-04-30 | [
[
"Petrov",
"A. N.",
""
]
] | Superpotentials (antisymmetric tensor densities) in Einstein-Gauss-Bonnet (EGB) gravity for arbitrary types of perturbations on arbitrary curved backgrounds are constructed. As a basis, the generalized conservation laws in the framework of an arbitrary D-dimensional metric theory, where conserved currents are expressed... |
0909.4133 | Christian Corda | Christian Corda | Information on the inflaton field from the spectrum of relic
gravitational waves | accepted for publication by General Relativity and Gravitation | Gen.Rel.Grav.42:1323-1333,2010; Erratum-ibid.42:1335-1336,2010 | 10.1007/s10714-009-0895-6 10.1007/s10714-009-0917-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a review of a traditional analysis, it is shown a variation of a more
recent treatment on the spectrum of relic gravitational waves (GWs). Then, a
connection between the two different treatments will be analysed. Such a
connection permits to obtain an interesting equation for the inflaton field.
This equation g... | [
{
"created": "Wed, 23 Sep 2009 06:38:24 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Sep 2009 12:15:03 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Oct 2009 12:19:55 GMT",
"version": "v3"
},
{
"created": "Mon, 16 Nov 2009 22:26:59 GMT",
"version": "v4"
},
{
"cr... | 2010-04-30 | [
[
"Corda",
"Christian",
""
]
] | After a review of a traditional analysis, it is shown a variation of a more recent treatment on the spectrum of relic gravitational waves (GWs). Then, a connection between the two different treatments will be analysed. Such a connection permits to obtain an interesting equation for the inflaton field. This equation giv... |
1607.00775 | Timothy Clifton | Timothy Clifton, Daniele Gregoris, Kjell Rosquist | The Magnetic Part of the Weyl Tensor, and the Expansion of Discrete
Universes | 42 pages, 27 figures | Gen Rel Grav 49(2), 1-40 (2017) | 10.1007/s10714-017-2192-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the effect that the magnetic part of the Weyl tensor has on the
large-scale expansion of space. This is done within the context of a class of
cosmological models that contain regularly arranged discrete masses, rather
than a continuous perfect fluid. The natural set of geodesic curves that one
should use t... | [
{
"created": "Mon, 4 Jul 2016 08:52:02 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jan 2017 18:48:50 GMT",
"version": "v2"
}
] | 2017-02-08 | [
[
"Clifton",
"Timothy",
""
],
[
"Gregoris",
"Daniele",
""
],
[
"Rosquist",
"Kjell",
""
]
] | We examine the effect that the magnetic part of the Weyl tensor has on the large-scale expansion of space. This is done within the context of a class of cosmological models that contain regularly arranged discrete masses, rather than a continuous perfect fluid. The natural set of geodesic curves that one should use to ... |
2107.05985 | Andr\'e Gro{\ss}ardt | Andr\'e Gro{\ss}ardt | Dephasing and inhibition of spin interference from semi-classical
self-gravitation | null | Class. Quantum Grav. 38 (2021) 245009 | 10.1088/1361-6382/ac36a6 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We present a detailed derivation of a model to study effects of
self-gravitation from semi-classical gravity, described by the
Schr\"odinger-Newton equation, employing spin superposition states in
inhomogeneous magnetic fields, as proposed recently for experiments searching
for gravity induced entanglement. Approxima... | [
{
"created": "Tue, 13 Jul 2021 11:09:38 GMT",
"version": "v1"
}
] | 2021-12-16 | [
[
"Großardt",
"André",
""
]
] | We present a detailed derivation of a model to study effects of self-gravitation from semi-classical gravity, described by the Schr\"odinger-Newton equation, employing spin superposition states in inhomogeneous magnetic fields, as proposed recently for experiments searching for gravity induced entanglement. Approximati... |
0707.3208 | Ronen Barak | R. Barak and Y. Ben-Aryeh | Amplification of gravitational waves signal in Michelson
coherent-squeezed interferometer | 5 pages, 2 figures | null | null | null | gr-qc | null | Gravitational waves reaching a Michelson interferometer are expected to
induce a very small change in the length of its arms causing a phase shift
between them, but it is very difficult to observe the extremely small phase
shift signals produced. In the present letter we show that the gravitational
waves signal could... | [
{
"created": "Sun, 22 Jul 2007 14:56:11 GMT",
"version": "v1"
}
] | 2007-07-24 | [
[
"Barak",
"R.",
""
],
[
"Ben-Aryeh",
"Y.",
""
]
] | Gravitational waves reaching a Michelson interferometer are expected to induce a very small change in the length of its arms causing a phase shift between them, but it is very difficult to observe the extremely small phase shift signals produced. In the present letter we show that the gravitational waves signal could b... |
gr-qc/0005004 | Alexander Linden | Alexander N. Linden | Existence of Noncompact Static Spherically Symmetric Solutions of
Einstein SU(2) Yang Mills Equations with small Cosmological Constant | 31 pages | Commun.Math.Phys.221:525-547,2001 | 10.1007/s002200100477 | null | gr-qc | null | We consider static spherically symmetric solutions of Einstein's equations
coupled to an SU(2) Yang Mills field that are smooth at the center of spherical
symmetry. We prove that with small cosmological constant there exist solutions
that possess a coordinate singularity at some r that is not maximum. The
singularity... | [
{
"created": "Mon, 1 May 2000 22:13:18 GMT",
"version": "v1"
}
] | 2009-02-23 | [
[
"Linden",
"Alexander N.",
""
]
] | We consider static spherically symmetric solutions of Einstein's equations coupled to an SU(2) Yang Mills field that are smooth at the center of spherical symmetry. We prove that with small cosmological constant there exist solutions that possess a coordinate singularity at some r that is not maximum. The singularity c... |
2208.10594 | Ernesto Contreras | C. Arias, E. Contreras, E. Fuenmayor, A. Ramos | Anisotropic star models in the context of vanishing complexity | arXiv admin note: text overlap with arXiv:2208.10260 | Annals Phys 436, 168671 (2022) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the definition of complexity for static and self--gravitating objects
to build up three physical general relativistic anisotropic models fulfilling
the vanishing complexity condition which serves to provide the extra
information needed to close the system of Einstein field equations. We evaluate
the physical a... | [
{
"created": "Thu, 18 Aug 2022 20:49:11 GMT",
"version": "v1"
}
] | 2022-08-24 | [
[
"Arias",
"C.",
""
],
[
"Contreras",
"E.",
""
],
[
"Fuenmayor",
"E.",
""
],
[
"Ramos",
"A.",
""
]
] | We use the definition of complexity for static and self--gravitating objects to build up three physical general relativistic anisotropic models fulfilling the vanishing complexity condition which serves to provide the extra information needed to close the system of Einstein field equations. We evaluate the physical acc... |
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