id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1412.5028 | Behrouz Mirza | Zeinab Sherkatghanad, Behrouz Mirza, Zahra Mirzaeyan, Seyed Ali
Hosseini Mansoori | Critical behaviors and phase transitions of black holes in higher order
gravities and extended phase spaces | 16 pages, 11 figures | International Journal of Modern Physics D, Vol. 26 (2017) 1750017 | 10.1142/S0218271817500171 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the critical behaviors and phase transitions of Gauss Bonnet-Born
Infeld-AdS black holes (GB-BI-AdS) for $d=5,6$ and the extended phase space. We
assume the cosmological constant, $\Lambda$, the coupling coefficient $\alpha$,
and the BI parameter $\beta$ to be thermodynamic pressures of the system.
Having... | [
{
"created": "Tue, 16 Dec 2014 14:57:40 GMT",
"version": "v1"
},
{
"created": "Sat, 7 May 2016 14:39:00 GMT",
"version": "v2"
}
] | 2017-01-03 | [
[
"Sherkatghanad",
"Zeinab",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Mirzaeyan",
"Zahra",
""
],
[
"Mansoori",
"Seyed Ali Hosseini",
""
]
] | We consider the critical behaviors and phase transitions of Gauss Bonnet-Born Infeld-AdS black holes (GB-BI-AdS) for $d=5,6$ and the extended phase space. We assume the cosmological constant, $\Lambda$, the coupling coefficient $\alpha$, and the BI parameter $\beta$ to be thermodynamic pressures of the system. Having m... |
2007.14860 | Thomas Pappas | Roman A. Konoplya, Thomas D. Pappas and Zdenek Stuchl\'ik | General parametrization of higher-dimensional black holes and its
application to Einstein-Lovelock theory | 22 pages, 4 figures, 2 Tables, 1 ancillary Mathematica(R) notebook,
version to match the one published in Phys. Rev. D | Phys. Rev. D 102, 084043 (2020) | 10.1103/PhysRevD.102.084043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we have developed the general parametrization for spherically symmetric
and asymptotically flat black-hole spacetimes in an arbitrary metric theory of
gravity. The parametrization is similar in spirit to the parametrized
post-Newtonian (PPN) approximation, but valid in the whole space outside the
event horizon, ... | [
{
"created": "Wed, 29 Jul 2020 14:28:11 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jan 2021 09:21:37 GMT",
"version": "v2"
}
] | 2021-01-26 | [
[
"Konoplya",
"Roman A.",
""
],
[
"Pappas",
"Thomas D.",
""
],
[
"Stuchlík",
"Zdenek",
""
]
] | Here we have developed the general parametrization for spherically symmetric and asymptotically flat black-hole spacetimes in an arbitrary metric theory of gravity. The parametrization is similar in spirit to the parametrized post-Newtonian (PPN) approximation, but valid in the whole space outside the event horizon, in... |
1212.1386 | Alexey Toporensky | S. Pavluchenko and A. Toporensky | Note on properties of exact cosmological solutions in Lovelock gravity | 7 pages, no figures; small changes | Gravitation & Cosmology 20, 127 (2014) | 10.1134/S0202289314020091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some properties of exact cosmological solutions for a flat
multidimensional anisotropic Universe in Lovelock gravity. A particular
attention is paid to some features of solution in a general Lovelock gravity
which have no their counterparts in analogous solution of General Relativity.
We consider exponential... | [
{
"created": "Thu, 6 Dec 2012 17:23:51 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Dec 2013 23:49:33 GMT",
"version": "v2"
}
] | 2014-06-11 | [
[
"Pavluchenko",
"S.",
""
],
[
"Toporensky",
"A.",
""
]
] | We study some properties of exact cosmological solutions for a flat multidimensional anisotropic Universe in Lovelock gravity. A particular attention is paid to some features of solution in a general Lovelock gravity which have no their counterparts in analogous solution of General Relativity. We consider exponential s... |
1311.5432 | George Bogoslovsky | G. Yu. Bogoslovsky | On relativistic symmetry of Finsler spaces with mutually opposite
preferred directions | 10 pages, 4 figures, to appear in the Proceedings of Conference
PIRT-2013 | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that in Minkowski space there exist transformations of the
coordinates of events alternative to the 3-parameter Lorentz boosts. However,
in contrast to the boosts, they constitute a 3-parameter noncompact group
which, in turn, is a subgroup of the homogeneous 6-parameter Lorentz group.
Moreover, in the sa... | [
{
"created": "Thu, 21 Nov 2013 14:59:04 GMT",
"version": "v1"
}
] | 2013-11-22 | [
[
"Bogoslovsky",
"G. Yu.",
""
]
] | It is shown that in Minkowski space there exist transformations of the coordinates of events alternative to the 3-parameter Lorentz boosts. However, in contrast to the boosts, they constitute a 3-parameter noncompact group which, in turn, is a subgroup of the homogeneous 6-parameter Lorentz group. Moreover, in the same... |
gr-qc/0006077 | Simonetta Frittelli | Simonetta Frittelli and Ezra T. Newman | Singularities of wavefronts and lightcones in the context of GR via null
foliations | 8 pages, 6 figures | Twistor Newslett. 43 (1997) 14-21 | null | null | gr-qc | null | We describe an approach to the issue of the singularities of null
hypersurfaces, due to the focusing of null geodesics, in the context of the
recently introduced formulation of GR via null foliations.
| [
{
"created": "Wed, 21 Jun 2000 18:50:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Frittelli",
"Simonetta",
""
],
[
"Newman",
"Ezra T.",
""
]
] | We describe an approach to the issue of the singularities of null hypersurfaces, due to the focusing of null geodesics, in the context of the recently introduced formulation of GR via null foliations. |
0904.2808 | Chen Juhua | Juhua Chen, Yongjiu Wang | Evolution of the interacting viscous dark energy model in Einstein
cosmology | 10 pages 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the evolution of the viscous dark energy (DE)
interacting with the dark matter (DM) in the Einstein cosmology model. Using
the linearizing theory of the dynamical system, we find, in our model, there
exists a stable late time scaling solution which corresponds to the
accelerating universe... | [
{
"created": "Sat, 18 Apr 2009 02:40:32 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Apr 2009 01:34:35 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Sep 2009 14:02:50 GMT",
"version": "v3"
},
{
"created": "Sat, 5 Sep 2009 13:40:19 GMT",
"version": "v4"
}
] | 2009-09-05 | [
[
"Chen",
"Juhua",
""
],
[
"Wang",
"Yongjiu",
""
]
] | In this paper we investigate the evolution of the viscous dark energy (DE) interacting with the dark matter (DM) in the Einstein cosmology model. Using the linearizing theory of the dynamical system, we find, in our model, there exists a stable late time scaling solution which corresponds to the accelerating universe, ... |
1412.3317 | Ayan Banerjee | Ayan Banerjee, Farook Rahaman, Kanti Jotania, Ranjan Sharma and Mosiur
Rahaman | Exact solutions in (2 + 1)-dimensional anti-de Sitter space-time
admitting a linear or non-linear equation of state | 10 pages, 7 figures | Astrophys. Space Sci. (2014) 355:2170 | 10.1007/s10509-014-2170-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational analyzes in lower dimensions has become a field of active
research interest ever since Banados, Teitelboim and Zanelli (BTZ) (Phys. Rev.
Lett. 69, 1849, 1992) proved the existence of a black hole solution in (2 + 1)
dimensions. The BTZ metric has inspired many investigators to develop and
analyze circul... | [
{
"created": "Fri, 5 Dec 2014 18:49:49 GMT",
"version": "v1"
}
] | 2014-12-11 | [
[
"Banerjee",
"Ayan",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Jotania",
"Kanti",
""
],
[
"Sharma",
"Ranjan",
""
],
[
"Rahaman",
"Mosiur",
""
]
] | Gravitational analyzes in lower dimensions has become a field of active research interest ever since Banados, Teitelboim and Zanelli (BTZ) (Phys. Rev. Lett. 69, 1849, 1992) proved the existence of a black hole solution in (2 + 1) dimensions. The BTZ metric has inspired many investigators to develop and analyze circular... |
gr-qc/9603011 | Leonid Grishchuk | L. P. Grishchuk | Vacuum Fluctuations and Cosmology | 9 pages, ReVTeX 3.0, no figures | null | null | WUGRAV-96-3 | gr-qc astro-ph hep-ph | null | The notion of vacuum fluctuations of the gravitational field plays important
role in cosmology. The strong variable gravitational field of the very early
Universe amplifies these fluctuations and transforms them into macroscopical
cosmological perturbations. Since the underlying process is the parametric
amplificatio... | [
{
"created": "Sun, 10 Mar 1996 00:34:26 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grishchuk",
"L. P.",
""
]
] | The notion of vacuum fluctuations of the gravitational field plays important role in cosmology. The strong variable gravitational field of the very early Universe amplifies these fluctuations and transforms them into macroscopical cosmological perturbations. Since the underlying process is the parametric amplification,... |
1406.6996 | Salvatore Capozziello | Salvatore Capozziello, Mariafelicia De Laurentis, and Orlando Luongo | Curvature dark energy reconstruction through different cosmographic
distance definitions | 10 pages, 4 figures, to appear in Annalen der Physik | null | 10.1002/andp.201400049 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of $f(\mathcal{R})$ gravity, dark energy is a geometrical
fluid with negative equation of state. Since the function $f(\mathcal{R})$ is
not known \emph{a priori}, the need of a model independent reconstruction of
its shape represents a relevant technique to determine which $f(\mathcal{R})$
model is rea... | [
{
"created": "Thu, 26 Jun 2014 19:54:34 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Luongo",
"Orlando",
""
]
] | In the context of $f(\mathcal{R})$ gravity, dark energy is a geometrical fluid with negative equation of state. Since the function $f(\mathcal{R})$ is not known \emph{a priori}, the need of a model independent reconstruction of its shape represents a relevant technique to determine which $f(\mathcal{R})$ model is reall... |
1709.00940 | Thomas Sotiriou | Thomas P. Sotiriou | Detecting Lorentz Violations with Gravitational Waves from Black Hole
Binaries | v1: 4 pages; v2: Version accepted for publication in PRL. Note that
v1 and PRL submission preceded GW170817 announcement but v2 includes
discussion about GW170817, as requested by PRL editor | Phys. Rev. Lett. 120, 041104 (2018) | 10.1103/PhysRevLett.120.041104 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave observations have been used to test Lorentz symmetry by
looking for dispersive effects that are caused by higher order corrections to
the dispersion relation. In this Letter I argue on general grounds that, when
such corrections are present, there will also be a scalar excitation. Hence, a
smoking-... | [
{
"created": "Mon, 4 Sep 2017 13:20:46 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jan 2018 11:00:41 GMT",
"version": "v2"
}
] | 2018-01-31 | [
[
"Sotiriou",
"Thomas P.",
""
]
] | Gravitational wave observations have been used to test Lorentz symmetry by looking for dispersive effects that are caused by higher order corrections to the dispersion relation. In this Letter I argue on general grounds that, when such corrections are present, there will also be a scalar excitation. Hence, a smoking-gu... |
2007.05264 | Costantino Pacilio | Costantino Pacilio, Massimo Vaglio, Andrea Maselli, Paolo Pani | Gravitational-wave detectors as particle-physics laboratories:
Constraining scalar interactions with a coherent inspiral model of boson-star
binaries | 13 pages, 8 figures; v3: fig.s 2-3 and tab.s 1-2 changed, results
unchanged | Phys. Rev. D 102, 083002 (2020) | 10.1103/PhysRevD.102.083002 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave (GW) detections of binary neutron star coalescences play a
crucial role to constrain the microscopic interaction of matter at ultrahigh
density. Similarly, if boson stars exist in the universe their coalescence can
be used to constrain the fundamental coupling constants of a scalar field
theory. We... | [
{
"created": "Fri, 10 Jul 2020 09:20:30 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Oct 2020 08:53:34 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Feb 2021 14:09:30 GMT",
"version": "v3"
}
] | 2021-02-17 | [
[
"Pacilio",
"Costantino",
""
],
[
"Vaglio",
"Massimo",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Pani",
"Paolo",
""
]
] | Gravitational-wave (GW) detections of binary neutron star coalescences play a crucial role to constrain the microscopic interaction of matter at ultrahigh density. Similarly, if boson stars exist in the universe their coalescence can be used to constrain the fundamental coupling constants of a scalar field theory. We d... |
1211.1375 | Mohammad Reza Setare | M. R. Setare, N. Mohammadipour | Cosmological viability conditions for $f(T)$ dark energy models | 15 pages, 7 figures, Accepted for publication in JCAP (2012) | null | 10.1088/1475-7516/2012/11/030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently $f(T)$ modified teleparallel gravity where T is the torsion scalar
has been proposed as the natural gravitational alternative for dark energy. We
perform a detailed dynamical analysis of these models and find conditions for
the cosmological viability of $f(T)$ dark energy models as geometrical
constraints on... | [
{
"created": "Tue, 6 Nov 2012 14:28:32 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Setare",
"M. R.",
""
],
[
"Mohammadipour",
"N.",
""
]
] | Recently $f(T)$ modified teleparallel gravity where T is the torsion scalar has been proposed as the natural gravitational alternative for dark energy. We perform a detailed dynamical analysis of these models and find conditions for the cosmological viability of $f(T)$ dark energy models as geometrical constraints on t... |
2007.04906 | Sourav Sur | Sourav Sur, Ashim Dutta and Hiyang Ramo Chothe | Mimetic-Metric-Torsion with induced Axial mode and Phantom barrier
crossing | 31 pages, 8 figures | null | 10.1140/epjc/s10052-021-09101-z | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the basic formalism of mimetic-metric-torsion gravity theory, in a
way that the mimetic scalar field can manifest itself geometrically as the
source of not only the trace mode of torsion, but also its axial (or,
pseudo-trace) mode. Specifically, we consider the mimetic field to be (i)
coupled explicitly to ... | [
{
"created": "Thu, 9 Jul 2020 16:08:44 GMT",
"version": "v1"
}
] | 2021-04-28 | [
[
"Sur",
"Sourav",
""
],
[
"Dutta",
"Ashim",
""
],
[
"Chothe",
"Hiyang Ramo",
""
]
] | We extend the basic formalism of mimetic-metric-torsion gravity theory, in a way that the mimetic scalar field can manifest itself geometrically as the source of not only the trace mode of torsion, but also its axial (or, pseudo-trace) mode. Specifically, we consider the mimetic field to be (i) coupled explicitly to th... |
gr-qc/0703066 | Yao Cheng | Yao Cheng and Jian Qi Shen | Interactions between Multipolar Nuclear Transitions and Gravitational
Waves | 6 pages | null | null | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Interactions between multipolar nuclear transitions and gravitational waves
(GWs) are theoretically investigated. Two nonclassical scenarios of the GW
detection are suggested. We demonstrate in this report that the long-lived
Moessbauer nuclides of multipolar transitions are suitable transducers to
detect the impingi... | [
{
"created": "Mon, 12 Mar 2007 12:20:02 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jun 2008 11:50:52 GMT",
"version": "v2"
}
] | 2008-06-25 | [
[
"Cheng",
"Yao",
""
],
[
"Shen",
"Jian Qi",
""
]
] | Interactions between multipolar nuclear transitions and gravitational waves (GWs) are theoretically investigated. Two nonclassical scenarios of the GW detection are suggested. We demonstrate in this report that the long-lived Moessbauer nuclides of multipolar transitions are suitable transducers to detect the impinging... |
0906.1901 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Scalar field mass in generalized gravity | 11 pages, no figures, to appear in Class. Quantum Grav. References
added | Class.Quant.Grav.26:145014,2009 | 10.1088/0264-9381/26/14/145014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notions of mass and range of a Brans-Dicke-like scalar field in
scalar-tensor and f(R) gravity are subject to an ambiguity that hides a
potential trap. We spell out this ambiguity and identify a physically
meaningful and practical definition for these quantities. This is relevant when
giving a mass to this scalar... | [
{
"created": "Wed, 10 Jun 2009 10:00:53 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jun 2009 09:59:37 GMT",
"version": "v2"
}
] | 2009-09-09 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | The notions of mass and range of a Brans-Dicke-like scalar field in scalar-tensor and f(R) gravity are subject to an ambiguity that hides a potential trap. We spell out this ambiguity and identify a physically meaningful and practical definition for these quantities. This is relevant when giving a mass to this scalar i... |
1206.4021 | Felipe Falciano | F. T. Falciano and Roberto Pereira and N. Pinto-Neto and E. Sergio
Santini | The Wheeler-DeWitt Quantization Can Solve the Singularity Problem | 13 pages, 1 figure | Phys. Rev. D 86, 063504 (2012) | 10.1103/PhysRevD.86.063504 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Wheeler-DeWitt quantum cosmology of a spatially flat Friedmann
cosmological model with a massless free scalar field. We compare the consistent
histories approach with the de Broglie-Bohm theory when applied to this simple
model under two different quantization schemes: the Schr\"odinger-like
quantization... | [
{
"created": "Mon, 18 Jun 2012 19:19:55 GMT",
"version": "v1"
}
] | 2012-10-02 | [
[
"Falciano",
"F. T.",
""
],
[
"Pereira",
"Roberto",
""
],
[
"Pinto-Neto",
"N.",
""
],
[
"Santini",
"E. Sergio",
""
]
] | We study the Wheeler-DeWitt quantum cosmology of a spatially flat Friedmann cosmological model with a massless free scalar field. We compare the consistent histories approach with the de Broglie-Bohm theory when applied to this simple model under two different quantization schemes: the Schr\"odinger-like quantization, ... |
1904.12227 | Owen Pavel Fern\'andez Piedra | Owen Pavel Fern\'andez Piedra | Quantum stress tensor of massive vector field in the space-time of a
pointlike global monopole | 10 pages, 1 figure. arXiv admin note: text overlap with
arXiv:1904.11984 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The components of the renormalized quantum stress tensor for a massive vector
field in the spacetime of a pointlike global monopole are determined
analytically in the Schwinger-DeWitt approximation. The general results are
employed to investigate the pointwise energy conditions for the quantized
matter field, and it ... | [
{
"created": "Sat, 27 Apr 2019 23:41:41 GMT",
"version": "v1"
}
] | 2019-04-30 | [
[
"Piedra",
"Owen Pavel Fernández",
""
]
] | The components of the renormalized quantum stress tensor for a massive vector field in the spacetime of a pointlike global monopole are determined analytically in the Schwinger-DeWitt approximation. The general results are employed to investigate the pointwise energy conditions for the quantized matter field, and it is... |
1506.05739 | Xiangdong Zhang | Xiangdong Zhang | Fix Immirzi parameter by quasinormal modes in four and higher spacetime
dimensions | 6 pages, presentation improved, references added | Front. Phys. (2016) 11: 110401 | 10.1007/s11467-016-0561-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One parameter quantization ambiguity is existed in Loop quantum gravity which
is called the Immirzi parameter. In this paper, we fix this free paremater by
considering the quasinormal mode spectrum of black holes in four and higher
spacetime dimensions. As a consequence, our result consistents with
Bekenstein-Hawking... | [
{
"created": "Thu, 18 Jun 2015 16:21:03 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jul 2015 17:36:50 GMT",
"version": "v2"
}
] | 2016-10-13 | [
[
"Zhang",
"Xiangdong",
""
]
] | One parameter quantization ambiguity is existed in Loop quantum gravity which is called the Immirzi parameter. In this paper, we fix this free paremater by considering the quasinormal mode spectrum of black holes in four and higher spacetime dimensions. As a consequence, our result consistents with Bekenstein-Hawking e... |
1003.2207 | Viqar Husain | Golam Mortuza Hossain, Viqar Husain, Sanjeev S. Seahra | Background independent quantization and the uncertainty principle | 6 pages | Class.Quant.Grav.27:165013,2010 | 10.1088/0264-9381/27/16/165013 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that polymer quantization leads to a modified uncertainty
principle similar to that obtained from string theory and non-commutative
geometry. When applied to quantum field theory on general background
spacetimes, corrections to the uncertainty principle acquire a metric
dependence. For Friedmann-Robertson... | [
{
"created": "Wed, 10 Mar 2010 21:11:53 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Hossain",
"Golam Mortuza",
""
],
[
"Husain",
"Viqar",
""
],
[
"Seahra",
"Sanjeev S.",
""
]
] | It is shown that polymer quantization leads to a modified uncertainty principle similar to that obtained from string theory and non-commutative geometry. When applied to quantum field theory on general background spacetimes, corrections to the uncertainty principle acquire a metric dependence. For Friedmann-Robertson-W... |
gr-qc/0101063 | Pedro Marronetti | Pedro Marronetti | Approximate Solutions to the Binary Black Hole Initial Value Problem | 2 pages, to appear in the 9th Marcel Grossman Meeting Proceedings | null | 10.1142/9789812777386_0361 | null | gr-qc | null | We present approximate analytical solutions to the Hamiltonian and momentum
constraint equations, corresponding to systems composed of two black holes with
arbitrary linear and angular momentum. The analytical nature of these initial
data solutions makes them easier to implement in numerical evolutions than the
tradi... | [
{
"created": "Tue, 16 Jan 2001 20:21:33 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Marronetti",
"Pedro",
""
]
] | We present approximate analytical solutions to the Hamiltonian and momentum constraint equations, corresponding to systems composed of two black holes with arbitrary linear and angular momentum. The analytical nature of these initial data solutions makes them easier to implement in numerical evolutions than the traditi... |
gr-qc/0406022 | Hossein Farajollahi | Hossein Farajollahi, Hugh Luckock | Stochastic quantisation of locally supersymmetric models | 19 pages | IJTPGO, 2004 | null | null | gr-qc | null | Stochastic quantisation normally involves the introduction of a fictitious
extra time parameter, which is taken to infinity so that the system evolves to
an equilibrium state.In the case of a locally supersymmetric theory, an
interesting new possibility arises due to the existence of a Nicolai map. In
this case it tu... | [
{
"created": "Mon, 7 Jun 2004 12:51:31 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2008 11:46:55 GMT",
"version": "v2"
}
] | 2008-01-30 | [
[
"Farajollahi",
"Hossein",
""
],
[
"Luckock",
"Hugh",
""
]
] | Stochastic quantisation normally involves the introduction of a fictitious extra time parameter, which is taken to infinity so that the system evolves to an equilibrium state.In the case of a locally supersymmetric theory, an interesting new possibility arises due to the existence of a Nicolai map. In this case it turn... |
2010.09967 | Boris Runov | Boris Runov | On quantum determinants in integrable quantum gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein-Rosen waves with two polarizations are cylindrically symmetric
solutions to vacuum Einstein equations. Einstein equations in this case reduce
to an integrable system. In 1971, Geroch has shown that this system admits an
infinite-dimensional group of symmetry transformations known as the Geroch
group. The pha... | [
{
"created": "Tue, 20 Oct 2020 02:33:47 GMT",
"version": "v1"
}
] | 2020-10-21 | [
[
"Runov",
"Boris",
""
]
] | Einstein-Rosen waves with two polarizations are cylindrically symmetric solutions to vacuum Einstein equations. Einstein equations in this case reduce to an integrable system. In 1971, Geroch has shown that this system admits an infinite-dimensional group of symmetry transformations known as the Geroch group. The phase... |
1503.00856 | Pujian Mao | Glenn Barnich, Pierre-Henry Lambert, Pujian Mao | Three-dimensional asymptotically flat Einstein-Maxwell theory | 19 pages. Typos corrected, one section added for discussing the main
result. To appear in Classical and Quantum Gravity | Class. Quantum Grav. 32 (2015) 245001 | 10.1088/0264-9381/32/24/245001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three-dimensional Einstein-Maxwell theory with non trivial asymptotics at
null infinity is solved. The symmetry algebra is a Virasoro-Kac-Moody type
algebra that extends the bms3 algebra of the purely gravitational case.
Solution space involves logarithms and provides a tractable example of a
polyhomogeneous solution... | [
{
"created": "Tue, 3 Mar 2015 08:26:06 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2015 13:26:47 GMT",
"version": "v2"
}
] | 2015-11-26 | [
[
"Barnich",
"Glenn",
""
],
[
"Lambert",
"Pierre-Henry",
""
],
[
"Mao",
"Pujian",
""
]
] | Three-dimensional Einstein-Maxwell theory with non trivial asymptotics at null infinity is solved. The symmetry algebra is a Virasoro-Kac-Moody type algebra that extends the bms3 algebra of the purely gravitational case. Solution space involves logarithms and provides a tractable example of a polyhomogeneous solution s... |
1807.06225 | Shahar Hod | Shahar Hod | Stationary bound-state massive scalar field configurations supported by
spherically symmetric compact reflecting stars | 9 pages | The European Physical Journal C 77, 899 (2017) | 10.1140/epjc/s10052-017-5469-2 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has recently been demonstrated that asymptotically flat neutral reflecting
stars are characterized by an intriguing no-hair property. In particular, it
has been proved that these {\it horizonless} compact objects cannot support
spatially regular {\it static} matter configurations made of scalar (spin-0)
fields, ve... | [
{
"created": "Tue, 17 Jul 2018 05:03:59 GMT",
"version": "v1"
}
] | 2018-07-25 | [
[
"Hod",
"Shahar",
""
]
] | It has recently been demonstrated that asymptotically flat neutral reflecting stars are characterized by an intriguing no-hair property. In particular, it has been proved that these {\it horizonless} compact objects cannot support spatially regular {\it static} matter configurations made of scalar (spin-0) fields, vect... |
2108.04853 | Che-Yu Chen | Che-Yu Chen, Yu-Hsien Kung | Modified Teleparallel Gravity induced by quantum fluctuations | 11 pages, 4 figures. Updated to match the published version | Phys.Dark Univ. 35 (2022) 100956 | 10.1016/j.dark.2022.100956 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the semi-classical regime, quantum fluctuations embedded in a Riemannian
spacetime can be effectively recast as classical back reactions and manifest
themselves in the form of non-minimal couplings between matter and curvature.
In this work, we exhibit that this semi-classical description can also be
applied withi... | [
{
"created": "Tue, 10 Aug 2021 18:13:24 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Aug 2021 09:23:20 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Nov 2021 05:50:20 GMT",
"version": "v3"
},
{
"created": "Fri, 4 Feb 2022 18:36:44 GMT",
"version": "v4"
}
] | 2022-02-07 | [
[
"Chen",
"Che-Yu",
""
],
[
"Kung",
"Yu-Hsien",
""
]
] | In the semi-classical regime, quantum fluctuations embedded in a Riemannian spacetime can be effectively recast as classical back reactions and manifest themselves in the form of non-minimal couplings between matter and curvature. In this work, we exhibit that this semi-classical description can also be applied within ... |
1903.08650 | Upala Mukhopadhyay | Upala Mukhopadhyay, Debasish Majumdar and Debabrata Adak | Evolution of Dark Energy Perturbations for Slotheon Field and Power
Spectrum | 20 pages LaTeX, 6 figures | null | 10.1140/epjc/s10052-020-8165-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of modified gravity model namely Slotheon model,
inspired by the theory of extra dimensions, we explore the behaviour of Dark
Energy and the perturbations thereof. The Dark Energy and matter perturbations
equations are then derived and solved numerically by defining certain
dimensionless variable... | [
{
"created": "Wed, 20 Mar 2019 07:01:25 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Mukhopadhyay",
"Upala",
""
],
[
"Majumdar",
"Debasish",
""
],
[
"Adak",
"Debabrata",
""
]
] | Within the framework of modified gravity model namely Slotheon model, inspired by the theory of extra dimensions, we explore the behaviour of Dark Energy and the perturbations thereof. The Dark Energy and matter perturbations equations are then derived and solved numerically by defining certain dimensionless variables ... |
2212.12889 | Anshuman Baruah | Parangam Goswami and Anshuman Baruah and Atri Deshamukhya | Spherically symmetric wormholes in General Relativity and modified
gravity with a Kalb-Ramond background | 26 Pages, 19 Figures, 1 Table | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Among the several modified/extended gravity paradigms, the concept of
antisymmetric connections leading to space-time torsion can be traced back to
Cartan. More recently, developments in string theory have suggested the
existence of a rank-2 self-interacting tensor field called the Kalb-Ramond
field with similar outc... | [
{
"created": "Sun, 25 Dec 2022 10:37:47 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2023 09:36:40 GMT",
"version": "v2"
}
] | 2023-06-01 | [
[
"Goswami",
"Parangam",
""
],
[
"Baruah",
"Anshuman",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | Among the several modified/extended gravity paradigms, the concept of antisymmetric connections leading to space-time torsion can be traced back to Cartan. More recently, developments in string theory have suggested the existence of a rank-2 self-interacting tensor field called the Kalb-Ramond field with similar outcom... |
1005.4343 | Rong-Jia Yang | Rong-Jia Yang and Xiang-Ting Gao | Restrictions on purely kinetic k-essence | 4 pages, 2 figures | Chin. Phys. Lett. 28 (2011) 109502 | 10.1088/0256-307X/28/10/109502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We restrict purely kinetic k-essence. Assuming the equation of state is a
power law of the kinetic energy: $w=w_0X^{\alpha}$, to obtain accelerated
phases, we must have $\alpha>0$ as one of necessary conditions, constrained
from the conditions for stability and causality, and the k-essence must behave
like phantom. W... | [
{
"created": "Mon, 24 May 2010 14:53:42 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2010 03:22:25 GMT",
"version": "v2"
}
] | 2011-10-13 | [
[
"Yang",
"Rong-Jia",
""
],
[
"Gao",
"Xiang-Ting",
""
]
] | We restrict purely kinetic k-essence. Assuming the equation of state is a power law of the kinetic energy: $w=w_0X^{\alpha}$, to obtain accelerated phases, we must have $\alpha>0$ as one of necessary conditions, constrained from the conditions for stability and causality, and the k-essence must behave like phantom. We ... |
2005.06917 | Sergey L Cherkas | Sergey L. Cherkas and Vladimir L. Kalashnikov | Illusiveness of the problem of time | Essay written for the Gravity Research Foundation 2020. It is based
on arXiv:2003.11284 | Nonlin. Phenom. Complex Syst. 24 (2021) 192-197 | 10.33581/1561-4085-2021-24-2-192-197 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The essay is devoted to the problem of time in the context of quantum
cosmology, which acquires a philosophical level to date. At an example of the
minisuperspace model, we show that this problem is illusive in the sense that
it does not prevent to calculate mean values of the operators over the quantum
state of the ... | [
{
"created": "Thu, 14 May 2020 12:41:02 GMT",
"version": "v1"
}
] | 2021-08-23 | [
[
"Cherkas",
"Sergey L.",
""
],
[
"Kalashnikov",
"Vladimir L.",
""
]
] | The essay is devoted to the problem of time in the context of quantum cosmology, which acquires a philosophical level to date. At an example of the minisuperspace model, we show that this problem is illusive in the sense that it does not prevent to calculate mean values of the operators over the quantum state of the un... |
gr-qc/0401101 | Miguel Lorente | P. Kramer, M. Lorente | The double torus as a 2D cosmos: groups, geometry and closed geodesics | Latex, 27 pages, 5 figures (late submission to arxiv.org) | J.Phys.A35:1961-1981,2002 | 10.1088/0305-4470/35/8/312 | null | gr-qc | null | The double torus provides a relativistic model for a closed 2D cosmos with
topology of genus 2 and constant negative curvature. Its unfolding into an
octagon extends to an octagonal tessellation of its universal covering, the
hyperbolic space H^2. The tessellation is analysed with tools from hyperbolic
crystallograph... | [
{
"created": "Mon, 26 Jan 2004 13:51:28 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kramer",
"P.",
""
],
[
"Lorente",
"M.",
""
]
] | The double torus provides a relativistic model for a closed 2D cosmos with topology of genus 2 and constant negative curvature. Its unfolding into an octagon extends to an octagonal tessellation of its universal covering, the hyperbolic space H^2. The tessellation is analysed with tools from hyperbolic crystallography.... |
1806.02589 | Katsuki Aoki | Katsuki Aoki and Keigo Shimada | Galileon and generalized Galileon with projective invariance in a
metric-affine formalism | 13 pages, no figure, published version | Phys. Rev. D 98, 044038 (2018) | 10.1103/PhysRevD.98.044038 | WU-AP/1805/18 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study scalar-tensor theories respecting the projective invariance in the
metric-affine formalism. The metric-affine formalism is a formulation of
gravitational theories such that the metric and the connection are independent
variables in the first place. In this formalism, the Einstein-Hilbert action
has an additi... | [
{
"created": "Thu, 7 Jun 2018 09:57:00 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Sep 2018 06:10:06 GMT",
"version": "v2"
}
] | 2018-09-24 | [
[
"Aoki",
"Katsuki",
""
],
[
"Shimada",
"Keigo",
""
]
] | We study scalar-tensor theories respecting the projective invariance in the metric-affine formalism. The metric-affine formalism is a formulation of gravitational theories such that the metric and the connection are independent variables in the first place. In this formalism, the Einstein-Hilbert action has an addition... |
1801.01479 | Daniele Pranzetti | Daniele Oriti, Daniele Pranzetti, Lorenzo Sindoni | Black Holes as Quantum Gravity Condensates | 22 pages | Phys. Rev. D 97, 066017 (2018) | 10.1103/PhysRevD.97.066017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We model spherically symmetric black holes within the group field theory
formalism for quantum gravity via generalised condensate states, involving sums
over arbitrarily refined graphs (dual to 3d triangulations). The construction
relies heavily on both the combinatorial tools of random tensor models and the
quantum ... | [
{
"created": "Thu, 4 Jan 2018 18:18:37 GMT",
"version": "v1"
}
] | 2018-03-28 | [
[
"Oriti",
"Daniele",
""
],
[
"Pranzetti",
"Daniele",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | We model spherically symmetric black holes within the group field theory formalism for quantum gravity via generalised condensate states, involving sums over arbitrarily refined graphs (dual to 3d triangulations). The construction relies heavily on both the combinatorial tools of random tensor models and the quantum ge... |
1907.04746 | Luiz Carlos Leite | Luiz C. S. Leite, Carolina L. Benone, Lu\'is C. B. Crispino | On-axis scattering of scalar fields by charged rotating black holes | 7 pages, 3 figures | Physics Letters B 795 (2019) 496-501 | 10.1016/j.physletb.2019.06.027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scattering of a massless scalar field by a Kerr-Newman
black hole, considering the case of on-axis incidence. We use the partial wave
method to find numerical results for the scattering cross section, which we
compare with classical and semiclassical analytical results, obtaining
excellent agreemen... | [
{
"created": "Wed, 10 Jul 2019 14:21:51 GMT",
"version": "v1"
}
] | 2019-07-11 | [
[
"Leite",
"Luiz C. S.",
""
],
[
"Benone",
"Carolina L.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | We investigate the scattering of a massless scalar field by a Kerr-Newman black hole, considering the case of on-axis incidence. We use the partial wave method to find numerical results for the scattering cross section, which we compare with classical and semiclassical analytical results, obtaining excellent agreement.... |
1502.08018 | Lunchakorn Tannukij | Tossaporn Chullaphan, Lunchakorn Tannukij, Pitayuth Wongjun | Extended DBI massive gravity with generalized fiducial metric | 13 pages, 4 figures. Minor changes. A published version | JHEP 06 (2015) 038 | 10.1007/JHEP06(2015)038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an extended model of DBI massive gravity by generalizing the
fiducial metric to be an induced metric on the brane corresponding to a domain
wall moving in five-dimensional Schwarzschild-Anti-de Sitter spacetime. The
model admits all solutions of FLRW metric including flat, closed and open
geometries while... | [
{
"created": "Tue, 24 Feb 2015 10:22:23 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jun 2015 08:29:41 GMT",
"version": "v2"
}
] | 2015-06-09 | [
[
"Chullaphan",
"Tossaporn",
""
],
[
"Tannukij",
"Lunchakorn",
""
],
[
"Wongjun",
"Pitayuth",
""
]
] | We consider an extended model of DBI massive gravity by generalizing the fiducial metric to be an induced metric on the brane corresponding to a domain wall moving in five-dimensional Schwarzschild-Anti-de Sitter spacetime. The model admits all solutions of FLRW metric including flat, closed and open geometries while t... |
2009.00949 | Nils A. Nilsson | Kellie O'Neal-Ault, Quentin G. Bailey, Nils A. Nilsson | 3+1 Formulation of the Standard-Model Extension Gravity Sector | 18 pages, 2 figures. Matches published version | Phys. Rev. D 103, 044010 (2021) | 10.1103/PhysRevD.103.044010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a 3+1 formulation of the effective field theory framework called
the Standard-Model Extension in the gravitational sector. The explicit local
Lorentz and diffeomorphism symmetry breaking assumption is adopted and we
perform a Dirac-Hamiltonian analysis. We show that the structure of the
dynamics presents s... | [
{
"created": "Wed, 2 Sep 2020 11:08:24 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Feb 2021 14:35:20 GMT",
"version": "v2"
}
] | 2021-02-15 | [
[
"O'Neal-Ault",
"Kellie",
""
],
[
"Bailey",
"Quentin G.",
""
],
[
"Nilsson",
"Nils A.",
""
]
] | We present a 3+1 formulation of the effective field theory framework called the Standard-Model Extension in the gravitational sector. The explicit local Lorentz and diffeomorphism symmetry breaking assumption is adopted and we perform a Dirac-Hamiltonian analysis. We show that the structure of the dynamics presents sig... |
gr-qc/0502090 | Serguei Krasnikov | S. Krasnikov | What does the Letelier-Gal'tsov metric describe? | 4pages, 1 figure. v2 A few words are changed in accordance with the
published version | Class.Quant.Grav. 23 (2006) 573 | 10.1088/0264-9381/23/2/N02 | null | gr-qc astro-ph | null | Recently the structure of the Letelier-Gal'tsov spacetime has become a matter
of some controversy. I show that the metric proposed in \cite{letgal} is
defined only on a dense subset of the whole manifold. In the case when it can
be defined on the remainder by continuity, the resulting spacetime corresponds
to a syste... | [
{
"created": "Tue, 22 Feb 2005 01:29:36 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jan 2006 17:31:12 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Krasnikov",
"S.",
""
]
] | Recently the structure of the Letelier-Gal'tsov spacetime has become a matter of some controversy. I show that the metric proposed in \cite{letgal} is defined only on a dense subset of the whole manifold. In the case when it can be defined on the remainder by continuity, the resulting spacetime corresponds to a system ... |
2002.05862 | Henrique Matheus Gauy | Henrique Matheus Gauy and Javier Ramos-Caro | PPN rotation curves in static distributions with spherical symmetry | 15 pages, 6 figures | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From a Parametrized Post-Newtonian (PPN) [46-51] perspective, we address the
question of whether or not the new degrees of freedom, represented by the PPN
potentials, can lead to significant modifications in the dynamics of galaxies
in the direction of rendering dark matter obsolete. Here, we focus on the study
of ro... | [
{
"created": "Fri, 14 Feb 2020 03:47:42 GMT",
"version": "v1"
}
] | 2020-02-17 | [
[
"Gauy",
"Henrique Matheus",
""
],
[
"Ramos-Caro",
"Javier",
""
]
] | From a Parametrized Post-Newtonian (PPN) [46-51] perspective, we address the question of whether or not the new degrees of freedom, represented by the PPN potentials, can lead to significant modifications in the dynamics of galaxies in the direction of rendering dark matter obsolete. Here, we focus on the study of rota... |
2301.00358 | Dr. Bikash Chandra Paul | Bikash Chandra Paul | Nonsingular Black Holes in Higher dimensions | 17 pages 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a class of new nonsingular black holes in higher dimensional
theories of gravity. Assuming a specific form of the stress energy tensor exact
analytic solutions of the field equation are generated in general theory of
relativity (GR) and Rastall theory. The non-singular black hole solutions are
obtained wit... | [
{
"created": "Sun, 1 Jan 2023 06:31:27 GMT",
"version": "v1"
}
] | 2023-01-03 | [
[
"Paul",
"Bikash Chandra",
""
]
] | We present a class of new nonsingular black holes in higher dimensional theories of gravity. Assuming a specific form of the stress energy tensor exact analytic solutions of the field equation are generated in general theory of relativity (GR) and Rastall theory. The non-singular black hole solutions are obtained with ... |
1407.6014 | Alexander B. Balakin | Alexander B. Balakin and Jos\'e P. S. Lemos | Einstein-aether theory with a Maxwell field: General formalism | 30 pages, no figures | AnnalsPhys. 350:454-484, 2014 | 10.1016/j.aop.2014.07.024 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the Einstein-aether theory to include the Maxwell field in a
nontrivial manner by taking into account its interaction with the time-like
unit vector field characterizing the aether. We also include a generic matter
term. We present a model with a Lagrangian that includes cross-terms linear and
quadratic in ... | [
{
"created": "Tue, 22 Jul 2014 20:00:40 GMT",
"version": "v1"
}
] | 2014-08-27 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Lemos",
"José P. S.",
""
]
] | We extend the Einstein-aether theory to include the Maxwell field in a nontrivial manner by taking into account its interaction with the time-like unit vector field characterizing the aether. We also include a generic matter term. We present a model with a Lagrangian that includes cross-terms linear and quadratic in th... |
1408.5486 | Andrea Geralico | Donato Bini, Andrea Geralico, Maria Haney, Antonello Ortolan | Particle dynamics and deviation effects in the field of a strong
electromagnetic wave | 16 pages, 8 figures; published version | Phys. Rev. D 89, 104049 (2014) | 10.1103/PhysRevD.89.104049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some strong field effects on test particle motion associated with the
propagation of a plane electromagnetic wave in the exact theory of general
relativity are investigated. Two different profiles of the associated radiation
flux are considered in comparison, corresponding to either constant or
oscillating electric a... | [
{
"created": "Sat, 23 Aug 2014 10:37:28 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Haney",
"Maria",
""
],
[
"Ortolan",
"Antonello",
""
]
] | Some strong field effects on test particle motion associated with the propagation of a plane electromagnetic wave in the exact theory of general relativity are investigated. Two different profiles of the associated radiation flux are considered in comparison, corresponding to either constant or oscillating electric and... |
gr-qc/0601117 | Joan Josep Ferrando | Joan Josep Ferrando | Coll Positioning systems: a two-dimensional approach | 6 pages; in Proc. Spanish Relativity Meeting ERE-2005, Oviedo (Spain) | null | 10.1063/1.2218205 | null | gr-qc | null | The basic elements of Coll positioning systems (n clocks broadcasting
electromagnetic signals in a n-dimensional space-time) are presented in the
two-dimensional case. This simplified approach allows us to explain and to
analyze the properties and interest of these relativistic positioning systems.
The positioning sy... | [
{
"created": "Fri, 27 Jan 2006 10:33:36 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ferrando",
"Joan Josep",
""
]
] | The basic elements of Coll positioning systems (n clocks broadcasting electromagnetic signals in a n-dimensional space-time) are presented in the two-dimensional case. This simplified approach allows us to explain and to analyze the properties and interest of these relativistic positioning systems. The positioning syst... |
1506.06458 | Yu-Xiao Liu | Hao Yu, Yuan Zhong, Bao-Min Gu, Yu-Xiao Liu | Gravitational resonances on $f(R)$-brane | 17 pages, 14 figures, published version | Eur. Phys. J. C76 (2016) no.4, 195 | 10.1140/epjc/s10052-016-4039-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate various $f(R)$-brane models and compare their
gravitational resonance structures with the corresponding general relativity
(GR)-branes. {Starting from some known GR-brane solutions}, we derive thick
$f(R)$-brane solutions such that the metric, scalar field, and scalar potential
coincide ... | [
{
"created": "Mon, 22 Jun 2015 03:59:26 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Jul 2015 15:35:19 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Dec 2015 12:45:36 GMT",
"version": "v3"
},
{
"created": "Tue, 29 Mar 2016 06:56:27 GMT",
"version": "v4"
},
{
"cre... | 2016-04-15 | [
[
"Yu",
"Hao",
""
],
[
"Zhong",
"Yuan",
""
],
[
"Gu",
"Bao-Min",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this paper, we investigate various $f(R)$-brane models and compare their gravitational resonance structures with the corresponding general relativity (GR)-branes. {Starting from some known GR-brane solutions}, we derive thick $f(R)$-brane solutions such that the metric, scalar field, and scalar potential coincide wi... |
1611.01811 | Haryanto Siahaan | Haryanto M. Siahaan | Destroying extremal magnetized black holes | 26 pages, 6 figures; v2: refs added and corrected; v3: more
discussions on mass and energy | Phys. Rev. D 96, 024016 (2017) | 10.1103/PhysRevD.96.024016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gedanken experiment by Wald to destroy a black hole using a test particle
in the equatorial plane is adopted to the case of extremal magnetized black
holes. We find the presence of external magnetic fields resulting from the
"Ernst magnetization" permits a test particle to have strong enough energy to
destroy the... | [
{
"created": "Sun, 6 Nov 2016 17:54:47 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2016 12:25:21 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Jul 2017 16:10:08 GMT",
"version": "v3"
}
] | 2017-07-26 | [
[
"Siahaan",
"Haryanto M.",
""
]
] | The gedanken experiment by Wald to destroy a black hole using a test particle in the equatorial plane is adopted to the case of extremal magnetized black holes. We find the presence of external magnetic fields resulting from the "Ernst magnetization" permits a test particle to have strong enough energy to destroy the b... |
2211.04826 | Ilkka M\"akinen | Jerzy Lewandowski and Ilkka M\"akinen | Scalar curvature operator for quantum-reduced loop gravity | v2: Minor clarifications added. Version accepted for publication. v1:
31 pages, 4 figures | null | 10.1103/PhysRevD.107.126017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous article we have introduced an operator representing the
three-dimensional scalar curvature in loop quantum gravity. In this article we
examine the new curvature operator in the setting of quantum-reduced loop
gravity. We derive the explicit form of the curvature operator as an operator
on the Hilbert sp... | [
{
"created": "Wed, 9 Nov 2022 12:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jun 2023 12:05:41 GMT",
"version": "v2"
}
] | 2023-07-05 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Mäkinen",
"Ilkka",
""
]
] | In a previous article we have introduced an operator representing the three-dimensional scalar curvature in loop quantum gravity. In this article we examine the new curvature operator in the setting of quantum-reduced loop gravity. We derive the explicit form of the curvature operator as an operator on the Hilbert spac... |
2002.12916 | Alexander Kamenshchik | Alexander Yu. Kamenshchik and Tereza Vardanyan | Spatial Kasner solution and an infinite slab with constant energy
density | 5 pages, to be published in JETP Letters | JETP Letters 111 (2020) no 6, 306-310 | 10.1134/S0021364020060016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the solutions of the Einstein equations in the presence of a thick
infinite slab with constant energy density. When there is an isotropy in the
plane of the slab, we find an explicit exact solution that matches with the
Rindler and Weyl-Levi-Civita spacetimes outside the slab. We also show that
there are sol... | [
{
"created": "Fri, 28 Feb 2020 18:32:50 GMT",
"version": "v1"
}
] | 2020-06-08 | [
[
"Kamenshchik",
"Alexander Yu.",
""
],
[
"Vardanyan",
"Tereza",
""
]
] | We study the solutions of the Einstein equations in the presence of a thick infinite slab with constant energy density. When there is an isotropy in the plane of the slab, we find an explicit exact solution that matches with the Rindler and Weyl-Levi-Civita spacetimes outside the slab. We also show that there are solut... |
0705.2306 | Shahar Hod | Shahar Hod | Near-Extreme Black Holes and the Universal Relaxation Bound | 2 Pages. Submitted to PRD on 5/12/2007 | Class.Quant.Grav.24:4235-4238,2007 | 10.1088/0264-9381/24/16/N01 | null | gr-qc astro-ph hep-th | null | A fundamental bound on the relaxation time \tau of a perturbed
thermodynamical system has recently been derived, \tau \geq \hbar/\pi T, where
$T$ is the system's temperature. We demonstrate analytically that black holes
saturate this bound in the extremal limit and for large values of the azimuthal
number m of the pe... | [
{
"created": "Wed, 16 May 2007 09:09:54 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hod",
"Shahar",
""
]
] | A fundamental bound on the relaxation time \tau of a perturbed thermodynamical system has recently been derived, \tau \geq \hbar/\pi T, where $T$ is the system's temperature. We demonstrate analytically that black holes saturate this bound in the extremal limit and for large values of the azimuthal number m of the pert... |
1705.04949 | Gaurav Khanna | Izak Thuestad, Gaurav Khanna, Richard Price | Scalar Fields in Black Hole Spacetimes | 9 pages, 10 figures; updated references | Phys. Rev. D 96, 024020 (2017) | 10.1103/PhysRevD.96.024020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The time-evolution of matter fields in black hole exterior spacetimes is a
well-studied subject, spanning several decades of research. However, the
behavior of fields in the black hole interior spacetime, has only relatively
recently begun receiving some attention from the research community. In this
paper, we numeri... | [
{
"created": "Sun, 14 May 2017 10:57:02 GMT",
"version": "v1"
},
{
"created": "Wed, 24 May 2017 12:28:29 GMT",
"version": "v2"
}
] | 2017-07-19 | [
[
"Thuestad",
"Izak",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Price",
"Richard",
""
]
] | The time-evolution of matter fields in black hole exterior spacetimes is a well-studied subject, spanning several decades of research. However, the behavior of fields in the black hole interior spacetime, has only relatively recently begun receiving some attention from the research community. In this paper, we numerica... |
0910.1777 | Boris E. Meierovich | Boris E. Meierovich | Spontaneous Symmetry Breaking in General Relativity. Brane World Concept | 29 pages, 12 figures | Phys.Rev.D79:104027,2009 | 10.1103/PhysRevD.79.104027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational properties of a hedge-hog type topological defect in two extra
dimensions are considered in General Relativity employing a vector as the order
parameter. The developed macroscopic theory of phase transitions with
spontaneous symmetry breaking is applied to the analysis of possible "thick"
brane structur... | [
{
"created": "Fri, 9 Oct 2009 15:25:25 GMT",
"version": "v1"
}
] | 2010-01-15 | [
[
"Meierovich",
"Boris E.",
""
]
] | Gravitational properties of a hedge-hog type topological defect in two extra dimensions are considered in General Relativity employing a vector as the order parameter. The developed macroscopic theory of phase transitions with spontaneous symmetry breaking is applied to the analysis of possible "thick" brane structures... |
gr-qc/9607020 | Seth Major | Seth Major, Lee Smolin | Mixmaster quantum cosmology in terms of physical dynamics | RevTex, 1 figure | null | null | CGPG-96/4-2 | gr-qc | null | An approach to quantum cosmology, relying on strengths of both canonical and
path integral formalisms, is applied to the cosmological model, Bianchi type
IX. Physical quantum states are constructed on the maximal slice of the
cosmological history. A path integral is derived which evolves observables off
the maximal s... | [
{
"created": "Sun, 7 Jul 1996 20:20:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Major",
"Seth",
""
],
[
"Smolin",
"Lee",
""
]
] | An approach to quantum cosmology, relying on strengths of both canonical and path integral formalisms, is applied to the cosmological model, Bianchi type IX. Physical quantum states are constructed on the maximal slice of the cosmological history. A path integral is derived which evolves observables off the maximal sli... |
gr-qc/9901063 | Sumati Surya | A.Borde, H.F.Dowker, R.S.Garcia, R.D.Sorkin, S.Surya | Causal continuity in degenerate spacetimes | 34 pages, 11 figures, Latex2e, important references added,
introduction and discussions sections reworded slightly | Class.Quant.Grav. 16 (1999) 3457-3481 | 10.1088/0264-9381/16/11/303 | Imperial College/TP/98-99/35 | gr-qc hep-th | null | A change of spatial topology in a causal, compact spacetime cannot occur when
the metric is globally Lorentzian. One can however construct a causal metric
from a Riemannian metric and a Morse function on the background cobordism
manifold, which is Lorentzian almost everywhere except that it is degenerate at
each crit... | [
{
"created": "Sat, 23 Jan 1999 11:10:48 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Jan 1999 19:52:09 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Apr 1999 17:01:05 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Borde",
"A.",
""
],
[
"Dowker",
"H. F.",
""
],
[
"Garcia",
"R. S.",
""
],
[
"Sorkin",
"R. D.",
""
],
[
"Surya",
"S.",
""
]
] | A change of spatial topology in a causal, compact spacetime cannot occur when the metric is globally Lorentzian. One can however construct a causal metric from a Riemannian metric and a Morse function on the background cobordism manifold, which is Lorentzian almost everywhere except that it is degenerate at each critic... |
1009.5605 | David Brizuela | David Brizuela, Jose M. Martin-Garcia, Ulrich Sperhake, Kostas D.
Kokkotas | High-order perturbations of a spherical collapsing star | 21 pages | Phys.Rev.D82:104039,2010 | 10.1103/PhysRevD.82.104039 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Ref. [1, 2] a formalism to deal with high-order perturbations of a general
spherical background was developed. In this article, we apply it to the
particular case of a perfect fluid background. We have expressed the
perturbations of the energy-momentum tensor at any order in terms of the
perturbed fluid's pressure... | [
{
"created": "Tue, 28 Sep 2010 15:33:58 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Nov 2010 17:38:36 GMT",
"version": "v2"
}
] | 2010-12-13 | [
[
"Brizuela",
"David",
""
],
[
"Martin-Garcia",
"Jose M.",
""
],
[
"Sperhake",
"Ulrich",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | In Ref. [1, 2] a formalism to deal with high-order perturbations of a general spherical background was developed. In this article, we apply it to the particular case of a perfect fluid background. We have expressed the perturbations of the energy-momentum tensor at any order in terms of the perturbed fluid's pressure, ... |
1809.07034 | Leandros Perivolaropoulos | Radouane Gannouji, Lavrentios Kazantzidis, Leandros Perivolaropoulos
and David Polarski | Consistency of Modified Gravity with a decreasing $G_{\rm eff}(z)$ in a
$\Lambda$CDM background | 10 pages, 3 figures | Phys. Rev. D 98, 104044 (2018) | 10.1103/PhysRevD.98.104044 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent analyses \cite{Nesseris:2017vor,Kazantzidis:2018rnb} have indicated
that an effective Newton's constant $G_{\rm eff}(z)$ decreasing with redshift
may relieve the observed tension between the Planck15 best fit $\Lambda$CDM
cosmological background ({\it i.e.} Planck15/$\Lambda$CDM) and the
corresponding $\Lambda... | [
{
"created": "Wed, 19 Sep 2018 07:27:33 GMT",
"version": "v1"
}
] | 2018-12-05 | [
[
"Gannouji",
"Radouane",
""
],
[
"Kazantzidis",
"Lavrentios",
""
],
[
"Perivolaropoulos",
"Leandros",
""
],
[
"Polarski",
"David",
""
]
] | Recent analyses \cite{Nesseris:2017vor,Kazantzidis:2018rnb} have indicated that an effective Newton's constant $G_{\rm eff}(z)$ decreasing with redshift may relieve the observed tension between the Planck15 best fit $\Lambda$CDM cosmological background ({\it i.e.} Planck15/$\Lambda$CDM) and the corresponding $\Lambda$C... |
1005.2444 | Liu Zhao | Wei Xu, Liu Zhao and Bin Zhu | Five-dimensional vacuum Einstein spacetimes in C-metric like coordinates | 18 pages, 3 figures. Minor modifications, version appeared in Mod.
Phys. Lett. A | Mod. Phys. Lett. A25:2727-2743,2010 | 10.1142/S0217732310033967 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A 5-dimensional Einstein spacetime with (non)vanishing cosmological constant
is analyzed in detail. The metric is in close analogy with the 4-dimensional
massless uncharged C-metric in many aspects. The coordinate system, horizons
and causal structures, relations to standard de Sitter, anti de Sitter and
Minkowski va... | [
{
"created": "Fri, 14 May 2010 01:47:11 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2010 01:55:51 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Sep 2010 03:00:25 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Xu",
"Wei",
""
],
[
"Zhao",
"Liu",
""
],
[
"Zhu",
"Bin",
""
]
] | A 5-dimensional Einstein spacetime with (non)vanishing cosmological constant is analyzed in detail. The metric is in close analogy with the 4-dimensional massless uncharged C-metric in many aspects. The coordinate system, horizons and causal structures, relations to standard de Sitter, anti de Sitter and Minkowski vacu... |
1603.08190 | Ettore Minguzzi | E. Minguzzi | The boundary of the chronology violating set | Latex2e, 22 pages, 3 figures. v2: added proof that compactly
generated horizons are compactly constructed | Class. Quantum Grav. 33 (2016) 225004 | 10.1088/0264-9381/33/22/225004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A sufficiently general definition for the future and past boundaries of the
chronology violating region is given. In comparison to previous studies, this
work does not assume that the complement of the chronology violating set is
globally hyperbolic. The boundary of the chronology violating set is studied
and several... | [
{
"created": "Sun, 27 Mar 2016 09:02:59 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2016 12:03:24 GMT",
"version": "v2"
}
] | 2016-12-02 | [
[
"Minguzzi",
"E.",
""
]
] | A sufficiently general definition for the future and past boundaries of the chronology violating region is given. In comparison to previous studies, this work does not assume that the complement of the chronology violating set is globally hyperbolic. The boundary of the chronology violating set is studied and several p... |
0711.0193 | Paul Frampton | Paul H. Frampton and Thomas W. Kephart | Upper and Lower Bounds on Gravitational Entropy | 10 pages LaTeX. Minor corrections | JCAP0806:008,2008 | 10.1088/1475-7516/2008/06/008 | null | gr-qc | null | The entropy in the interior of the Universe has many contributions including
well understood ones from radiation and relic neutrinos. The gravitational
entropy is larger and more subtle. One contribution which provides our lower
bound is from supermassive black holes at the centers of galaxies. The
remainder is harde... | [
{
"created": "Thu, 1 Nov 2007 19:23:51 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Apr 2008 18:51:50 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Frampton",
"Paul H.",
""
],
[
"Kephart",
"Thomas W.",
""
]
] | The entropy in the interior of the Universe has many contributions including well understood ones from radiation and relic neutrinos. The gravitational entropy is larger and more subtle. One contribution which provides our lower bound is from supermassive black holes at the centers of galaxies. The remainder is harder ... |
2309.07012 | Lalit Pathak | Lalit Pathak, Sanket Munishwar, Amit Reza, and Anand S. Sengupta | Prompt sky localization of compact binary sources using a meshfree
approximation | 21 pages, 10 figures Change in the title and Abstract. A couple of
changes in the main text | Phys. Rev. D 108, 064055 (2023) | 10.1103/PhysRevD.109.024053 | LIGO DCC number: LIGO-P2300302 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The number of gravitational wave signals from the merger of compact binary
systems detected in the network of advanced LIGO and Virgo detectors is
expected to increase considerably in the upcoming science runs. Once a
confident detection is made, it is crucial to reconstruct the source's
properties rapidly, particula... | [
{
"created": "Wed, 13 Sep 2023 15:04:04 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Feb 2024 11:18:25 GMT",
"version": "v2"
}
] | 2024-02-21 | [
[
"Pathak",
"Lalit",
""
],
[
"Munishwar",
"Sanket",
""
],
[
"Reza",
"Amit",
""
],
[
"Sengupta",
"Anand S.",
""
]
] | The number of gravitational wave signals from the merger of compact binary systems detected in the network of advanced LIGO and Virgo detectors is expected to increase considerably in the upcoming science runs. Once a confident detection is made, it is crucial to reconstruct the source's properties rapidly, particularl... |
1012.1194 | Peter Wolf | Peter Wolf, Luc Blanchet, Christian J. Bord\'e, Serge Reynaud,
Christophe Salomon, Claude Cohen-Tannoudji | Does an atom interferometer test the gravitational redshift at the
Compton frequency ? | 26 pages. Modified version to appear in Classical and Quantum Gravity | Class.Quant.Grav.28:145017,2011 | 10.1088/0264-9381/28/14/145017 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Atom interferometers allow the measurement of the acceleration of freely
falling atoms with respect to an experimental platform at rest on Earth's
surface. Such experiments have been used to test the universality of free fall
by comparing the acceleration of the atoms to that of a classical freely
falling object. In ... | [
{
"created": "Mon, 6 Dec 2010 15:00:54 GMT",
"version": "v1"
},
{
"created": "Sat, 7 May 2011 18:06:38 GMT",
"version": "v2"
},
{
"created": "Thu, 12 May 2011 15:25:25 GMT",
"version": "v3"
}
] | 2015-03-17 | [
[
"Wolf",
"Peter",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Bordé",
"Christian J.",
""
],
[
"Reynaud",
"Serge",
""
],
[
"Salomon",
"Christophe",
""
],
[
"Cohen-Tannoudji",
"Claude",
""
]
] | Atom interferometers allow the measurement of the acceleration of freely falling atoms with respect to an experimental platform at rest on Earth's surface. Such experiments have been used to test the universality of free fall by comparing the acceleration of the atoms to that of a classical freely falling object. In a ... |
gr-qc/9508038 | Sergey Krasnikov | S. V. Krasnikov | On the Quantum Stability of the Time Machine | LaTex, 12 pages, no figures | Phys.Rev. D54 (1996) 7322-7327 | 10.1103/PhysRevD.54.7322 | null | gr-qc | null | In a number of papers it has been claimed that the time machine are quantum
unstable, which manifests itself in the divergence of the vacuum expectation
value of the stress-energy tensor $\langle{\bf T}\rangle$ near the Cauchy
horizon. The expression for $\langle{\bf T}\rangle$ was found in these papers
on the basis ... | [
{
"created": "Wed, 16 Aug 1995 11:10:50 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Krasnikov",
"S. V.",
""
]
] | In a number of papers it has been claimed that the time machine are quantum unstable, which manifests itself in the divergence of the vacuum expectation value of the stress-energy tensor $\langle{\bf T}\rangle$ near the Cauchy horizon. The expression for $\langle{\bf T}\rangle$ was found in these papers on the basis of... |
gr-qc/9601051 | Ed Schaefer | Edward M. Schaefer | Propagation-Based General Relativity | 20 pages (down from 31), no figures, REVTeX, based on a talk given to
the 5th Midwest Relativity Conference. Title change & major revision; Changes
reflect of better understanding the current relativity theory, this theory,
and their inter-relationship | null | null | null | gr-qc | null | It is assumed that the radial propagation of light with respect to the naive
coordinate system of the observer is uniform and isotropic and that the
physical rate of propagation of light is the same for all observers. In
accelerated frames of reference, these assumptions lead to the findings that
the measured value o... | [
{
"created": "Wed, 31 Jan 1996 18:11:52 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Sep 1996 20:38:24 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Schaefer",
"Edward M.",
""
]
] | It is assumed that the radial propagation of light with respect to the naive coordinate system of the observer is uniform and isotropic and that the physical rate of propagation of light is the same for all observers. In accelerated frames of reference, these assumptions lead to the findings that the measured value of ... |
gr-qc/9710107 | Jochen Peitz | Jochen Peitz (1) and Stefan Appl (2) ((1) Landessternwarte Heidelberg,
(2) Institut f"ur Angewandte Mathematik, Universit"at Heidelberg) | 3+1 formulation of non-ideal hydrodynamics | 24 pages, LateX, uses mn.sty and AMS fonts, no figures, accepted for
publication in the MNRAS, also available via
http://www.lsw.uni-heidelberg.de/~jpeitz/Personal.html | null | 10.1046/j.1365-8711.1998.01259.x | null | gr-qc astro-ph | null | The equations governing dissipative relativistic hydrodynamics are formulated
within the 3+1 approach for arbitrary spacetimes. Dissipation is accounted for
by applying the theory of extended causal thermodynamics (Israel-Stewart
theory). This description eliminates the causality violating infinite signal
speeds pres... | [
{
"created": "Wed, 22 Oct 1997 19:23:05 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Peitz",
"Jochen",
""
],
[
"Appl",
"Stefan",
""
]
] | The equations governing dissipative relativistic hydrodynamics are formulated within the 3+1 approach for arbitrary spacetimes. Dissipation is accounted for by applying the theory of extended causal thermodynamics (Israel-Stewart theory). This description eliminates the causality violating infinite signal speeds presen... |
1103.1743 | Mohammad Malekjani | M. Malekjani, A. Khodam-Mohammadi and N. Nazari-Pooya | Generalized Chaplygin gas model: Cosmological consequences and
statefinder diagnosis | 10 pages, 5 figures, accepted in Astrophys Space Sci. (2011) | Astrophys.Space Sci.334:193-201,2011 | 10.1007/s10509-011-0671-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The generalized Chaplygin gas (GCG) model in spatially flat universe is
investigated. The cosmological consequences led by GCG model including the
evolution of EoS parameter, deceleration parameter and dimensionless Hubble
parameter are calculated. We show that the GCG model behaves as a general
quintessence model. T... | [
{
"created": "Wed, 9 Mar 2011 09:33:42 GMT",
"version": "v1"
}
] | 2011-06-10 | [
[
"Malekjani",
"M.",
""
],
[
"Khodam-Mohammadi",
"A.",
""
],
[
"Nazari-Pooya",
"N.",
""
]
] | The generalized Chaplygin gas (GCG) model in spatially flat universe is investigated. The cosmological consequences led by GCG model including the evolution of EoS parameter, deceleration parameter and dimensionless Hubble parameter are calculated. We show that the GCG model behaves as a general quintessence model. The... |
2206.07127 | Wen-Cong Gan | Wen-Cong Gan, Geeth Ongole, Emanuele Alesci, Yang An, Fu-Wen Shu,
Anzhong Wang | Understanding quantum black holes from quantum reduced loop gravity | revtex4-2, 18 figures, and four tables, v3: typos corrected,
published in PRD | Phys.Rev.D. 106, 126013 (2022) | 10.1103/PhysRevD.106.126013 | null | gr-qc astro-ph.GA hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We systematically study the top-down model of loop quantum black holes
(LQBHs), recently derived by Alesci, Bahrami and Pranzetti (ABP). To understand
the structure of the model, we first derive several well-known LQBH solutions
by taking proper limits. These include the B\"ohmer-Vandersloot and
Ashtekar-Olmedo-Singh... | [
{
"created": "Tue, 14 Jun 2022 19:39:52 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2022 05:22:33 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Dec 2022 04:23:07 GMT",
"version": "v3"
}
] | 2022-12-26 | [
[
"Gan",
"Wen-Cong",
""
],
[
"Ongole",
"Geeth",
""
],
[
"Alesci",
"Emanuele",
""
],
[
"An",
"Yang",
""
],
[
"Shu",
"Fu-Wen",
""
],
[
"Wang",
"Anzhong",
""
]
] | We systematically study the top-down model of loop quantum black holes (LQBHs), recently derived by Alesci, Bahrami and Pranzetti (ABP). To understand the structure of the model, we first derive several well-known LQBH solutions by taking proper limits. These include the B\"ohmer-Vandersloot and Ashtekar-Olmedo-Singh m... |
gr-qc/9404048 | null | D.V. Fursaev, G. Miele | Semiclassical Gravitational Effects in de Sitter Space at Finite
Temperature | pag.14, 1 figure in poscript file available under request, Preprint
DSF-8/94 | Class.Quant.Grav.12:393-402,1995 | 10.1088/0264-9381/12/2/008 | null | gr-qc | null | In the framework of finite temperature conformal scalar field theory on de
Sitter space-time the linearized Einstein equations for the renormalized stress
tensor are exactly solved. In this theory quantum field fluctuations are
concentrated near two spheres of the de Sitter radius, propagating as light
wave fronts. R... | [
{
"created": "Tue, 26 Apr 1994 07:12:33 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Fursaev",
"D. V.",
""
],
[
"Miele",
"G.",
""
]
] | In the framework of finite temperature conformal scalar field theory on de Sitter space-time the linearized Einstein equations for the renormalized stress tensor are exactly solved. In this theory quantum field fluctuations are concentrated near two spheres of the de Sitter radius, propagating as light wave fronts. Rel... |
2005.02086 | Hao Xu | Hao Xu, Yen Chin Ong | Black Hole Evaporation in Ho\v{r}ava-Lifshitz Gravity | 16 pages,9 figures;v2: discussion and numerical examples added in
sec.3.3, references added, minor corrections, accepted by EPJC | Eur.Phys.J. C80 (2020) no.7, 679 | 10.1140/epjc/s10052-020-8249-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ho\v{r}ava-Lifshitz (HL) gravity was formulated in hope of solving the
non-renormalization problem in Einstein gravity and the ghost problem in higher
derivative gravity theories by violating Lorentz invariance. In this work we
consider the spherically symmetric neutral AdS black hole evaporation process
in HL gravit... | [
{
"created": "Tue, 5 May 2020 12:01:28 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jul 2020 12:43:54 GMT",
"version": "v2"
}
] | 2020-08-11 | [
[
"Xu",
"Hao",
""
],
[
"Ong",
"Yen Chin",
""
]
] | Ho\v{r}ava-Lifshitz (HL) gravity was formulated in hope of solving the non-renormalization problem in Einstein gravity and the ghost problem in higher derivative gravity theories by violating Lorentz invariance. In this work we consider the spherically symmetric neutral AdS black hole evaporation process in HL gravity ... |
2305.15341 | Alex Deich | Pablo A. Cano, Alexander Deich, Nicol\'as Yunes | Accuracy of the slow-rotation approximation for black holes in modified
gravity in light of astrophysical observables | 19 pages, 11 figures, new version added two more references | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Near-future, space-based, radio- and gravitational-wave interferometry
missions will enable us to rigorously test whether the Kerr solution of general
relativity accurately describes astrophysical black holes, or if it requires
some kind of modification. At the same time, recent work has greatly improved
our understa... | [
{
"created": "Wed, 24 May 2023 16:55:40 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jun 2023 17:21:19 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jul 2023 16:40:44 GMT",
"version": "v3"
}
] | 2023-07-12 | [
[
"Cano",
"Pablo A.",
""
],
[
"Deich",
"Alexander",
""
],
[
"Yunes",
"Nicolás",
""
]
] | Near-future, space-based, radio- and gravitational-wave interferometry missions will enable us to rigorously test whether the Kerr solution of general relativity accurately describes astrophysical black holes, or if it requires some kind of modification. At the same time, recent work has greatly improved our understand... |
1903.02624 | Andrew Sullivan | Andrew Sullivan, Nicol\'as Yunes, Thomas P. Sotiriou | Exact Black Hole Solutions in Modified Gravity Theories: Spherical
Symmetry Case | 27 pages, 11 figures | Phys. Rev. D 101, 044024 (2020) | 10.1103/PhysRevD.101.044024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detailed observations of phenomena involving black holes, be it via
gravitational waves or more traditional electromagnetic means, can probe the
strong field regime of the gravitational interaction. The prediction of
features in such observations requires detailed knowledge of the black hole
spacetime, both within an... | [
{
"created": "Wed, 6 Mar 2019 21:44:09 GMT",
"version": "v1"
}
] | 2020-02-19 | [
[
"Sullivan",
"Andrew",
""
],
[
"Yunes",
"Nicolás",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | Detailed observations of phenomena involving black holes, be it via gravitational waves or more traditional electromagnetic means, can probe the strong field regime of the gravitational interaction. The prediction of features in such observations requires detailed knowledge of the black hole spacetime, both within and ... |
1701.05434 | Jarrod Williams | Juan A. Valiente Kroon, Jarrod L. Williams | Dain's invariant on non-time symmetric initial data sets | null | null | 10.1088/1361-6382/aa7102 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend Dain's construction of a geometric invariant characterising static
initial data sets for the vacuum Einstein field equations to situations with a
non-vanishing extrinsic curvature. This invariant gives a measure of how much
the initial data sets deviates from stationarity. In particular, it vanishes if
and ... | [
{
"created": "Thu, 19 Jan 2017 14:31:42 GMT",
"version": "v1"
},
{
"created": "Fri, 12 May 2017 07:37:32 GMT",
"version": "v2"
}
] | 2017-05-15 | [
[
"Kroon",
"Juan A. Valiente",
""
],
[
"Williams",
"Jarrod L.",
""
]
] | We extend Dain's construction of a geometric invariant characterising static initial data sets for the vacuum Einstein field equations to situations with a non-vanishing extrinsic curvature. This invariant gives a measure of how much the initial data sets deviates from stationarity. In particular, it vanishes if and on... |
1110.6085 | Joel Franklin | S. Deser and J. Franklin | Canonical Analysis and Stability of Lanczos-Lovelock Gravity | amplified, published version; section added on positive energy of
R+LL | Class. Quantum Grav. 29 (2012) 072001 | 10.1088/0264-9381/29/7/072001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a space-time analysis of the D>4 quadratic curvature
Lanczos-Lovelock (LL) model, exhibiting its dependence on intrinsic/extrinsic
curvatures, lapse and shifts. As expected from general covariance, the field
equations include D constraints, of zeroth and first time derivative order. In
the "linearized" - h... | [
{
"created": "Thu, 27 Oct 2011 14:10:19 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Mar 2012 17:57:40 GMT",
"version": "v2"
}
] | 2012-03-02 | [
[
"Deser",
"S.",
""
],
[
"Franklin",
"J.",
""
]
] | We perform a space-time analysis of the D>4 quadratic curvature Lanczos-Lovelock (LL) model, exhibiting its dependence on intrinsic/extrinsic curvatures, lapse and shifts. As expected from general covariance, the field equations include D constraints, of zeroth and first time derivative order. In the "linearized" - her... |
2309.14498 | Mouhssine Koussour | M. Koussour, N. Myrzakulov, Alnadhief H. A. Alfedeel, F. Awad, and M.
Bennai | Modeling cosmic acceleration with a generalized varying deceleration
parameter | Physics of the Dark Universe accepted version | Phys. Dark Universe 101339 (2023) | 10.1016/j.dark.2023.101339 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Understanding the accelerating expansion of the Universe remains a
fundamental challenge in modern cosmology. In this paper, we investigate a
cosmological model parametrized by a generalized variable deceleration
parameter to elucidate the dynamics driving cosmic acceleration. By employing
constraints from the latest... | [
{
"created": "Mon, 25 Sep 2023 19:49:41 GMT",
"version": "v1"
}
] | 2023-09-29 | [
[
"Koussour",
"M.",
""
],
[
"Myrzakulov",
"N.",
""
],
[
"Alfedeel",
"Alnadhief H. A.",
""
],
[
"Awad",
"F.",
""
],
[
"Bennai",
"M.",
""
]
] | Understanding the accelerating expansion of the Universe remains a fundamental challenge in modern cosmology. In this paper, we investigate a cosmological model parametrized by a generalized variable deceleration parameter to elucidate the dynamics driving cosmic acceleration. By employing constraints from the latest o... |
2002.05668 | Yi-Fan Wang | Yi-Fan Wang, Rui Niu, Tao Zhu, Wen Zhao | Gravitational-Wave Implications for the Parity Symmetry of Gravity at
GeV Scale | Accepted version for the Astrophysical Journal, posterior files and
plots in https://github.com/yi-fan-wang/ParitywithGW and
https://yi-fan-wang.github.io/ParitywithGW/ | 2021 ApJ 908 58 | 10.3847/1538-4357/abd7a6 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's general relativity, as the most successful theory of gravity, is
one of the cornerstones of modern physics. However, the experimental tests for
gravity in the high energy region are limited. The emerging gravitational-wave
astronomy has opened an avenue for probing the fundamental properties of
gravity in ... | [
{
"created": "Thu, 13 Feb 2020 17:47:12 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Feb 2021 13:41:16 GMT",
"version": "v2"
}
] | 2021-02-19 | [
[
"Wang",
"Yi-Fan",
""
],
[
"Niu",
"Rui",
""
],
[
"Zhu",
"Tao",
""
],
[
"Zhao",
"Wen",
""
]
] | Einstein's general relativity, as the most successful theory of gravity, is one of the cornerstones of modern physics. However, the experimental tests for gravity in the high energy region are limited. The emerging gravitational-wave astronomy has opened an avenue for probing the fundamental properties of gravity in st... |
gr-qc/9810066 | Michael Bordag | N.R. Khusnutdinov, M. Bordag | Ground State Energy of Massive Scalar Field in the Background of Finite
Thickness Cosmic String | 23 pages, Latex, 3 figures, subm. to Phys. Rev. D | Phys.Rev.D59:064017,1999 | 10.1103/PhysRevD.59.064017 | null | gr-qc | null | We calculate the ground state energy of a massive scalar field in the
background of a cosmic string of finite thickness (Gott-Hiscock metric). Using
zeta functional regularization we discuss the renormalization and the relevant
heat kernel coefficients in detail. The finite (non local) part of the ground
state energy... | [
{
"created": "Tue, 20 Oct 1998 15:56:03 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Khusnutdinov",
"N. R.",
""
],
[
"Bordag",
"M.",
""
]
] | We calculate the ground state energy of a massive scalar field in the background of a cosmic string of finite thickness (Gott-Hiscock metric). Using zeta functional regularization we discuss the renormalization and the relevant heat kernel coefficients in detail. The finite (non local) part of the ground state energy i... |
0806.4373 | Istvan Racz | Istv\'an R\'acz | A simple proof of the recent generalisations of Hawking's black hole
topology theorem | 12 pages, 1 figure | Class.Quant.Grav.25:162001,2008 | 10.1088/0264-9381/25/16/162001 | null | gr-qc hep-th math-ph math.DG math.GT math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A key result in four dimensional black hole physics, since the early 1970s,
is Hawking's topology theorem asserting that the cross-sections of an "apparent
horizon", separating the black hole region from the rest of the spacetime, are
topologically two-spheres. Later, during the 1990s, by applying a variant of
Hawkin... | [
{
"created": "Thu, 26 Jun 2008 18:21:18 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jul 2008 23:04:25 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Jun 2010 22:25:45 GMT",
"version": "v3"
}
] | 2014-11-18 | [
[
"Rácz",
"István",
""
]
] | A key result in four dimensional black hole physics, since the early 1970s, is Hawking's topology theorem asserting that the cross-sections of an "apparent horizon", separating the black hole region from the rest of the spacetime, are topologically two-spheres. Later, during the 1990s, by applying a variant of Hawking'... |
1612.04097 | Harold Erbin | Corinne de Lacroix, Harold Erbin | A short note on dynamics and degrees of freedom in $2d$ classical
gravity | 10 pages; v2: 13 pages, add clarifications | Gen. Relativ. Gravit. 52, 9 (2020) | 10.1007/s10714-020-2662-7 | LPTENS/16/48 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comment on some peculiarities of matter with and without Weyl invariance
coupled to classical $2d$ Einstein-Hilbert gravity for several models, in
particular, related to the counting of degrees of freedom and on the dynamics.
We find that theories where the matter action is Weyl invariant has generically
more degr... | [
{
"created": "Tue, 13 Dec 2016 11:01:09 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Feb 2020 11:21:40 GMT",
"version": "v2"
}
] | 2020-02-05 | [
[
"de Lacroix",
"Corinne",
""
],
[
"Erbin",
"Harold",
""
]
] | We comment on some peculiarities of matter with and without Weyl invariance coupled to classical $2d$ Einstein-Hilbert gravity for several models, in particular, related to the counting of degrees of freedom and on the dynamics. We find that theories where the matter action is Weyl invariant has generically more degree... |
2110.06796 | Jeff Steinhauer | Jeff Steinhauer | Confirmation of stimulated Hawking radiation, but not of black hole
lasing | null | null | 10.1103/PhysRevD.106.102007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stimulated Hawking radiation in an analogue black hole in a Bose-Einstein
condensate was reported seven years ago, and it was claimed that the
stimulation was of the black hole lasing variety. The study was based on
observation of rapidly-growing negative-energy waves. We find that the Hawking
particles are directly ... | [
{
"created": "Wed, 13 Oct 2021 15:29:13 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Steinhauer",
"Jeff",
""
]
] | Stimulated Hawking radiation in an analogue black hole in a Bose-Einstein condensate was reported seven years ago, and it was claimed that the stimulation was of the black hole lasing variety. The study was based on observation of rapidly-growing negative-energy waves. We find that the Hawking particles are directly ob... |
0901.0098 | Dmitri Gal'tsov | Dmitri V. Gal'tsov | Generating solutions via sigma-models | An updated version of the talk given at ICGA8 and published in the
Proceedings. 14 pages, ptptex | Prog.Theor.Phys.Suppl.172:121-130,2008 | 10.1143/PTPS.172.121 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent development of solution-generating techniques for four and
five-dimensional Einstein equations coupled to vector and scalar fields. This
includes D=4 Einstein-Maxwell-dilaton-axion theory with multiple vector fields,
D=5 Einstein-Maxwell gravity with the Chern-Simons term (minimal
five-dimensional su... | [
{
"created": "Wed, 31 Dec 2008 15:07:53 GMT",
"version": "v1"
}
] | 2009-02-27 | [
[
"Gal'tsov",
"Dmitri V.",
""
]
] | We review recent development of solution-generating techniques for four and five-dimensional Einstein equations coupled to vector and scalar fields. This includes D=4 Einstein-Maxwell-dilaton-axion theory with multiple vector fields, D=5 Einstein-Maxwell gravity with the Chern-Simons term (minimal five-dimensional supe... |
1809.08275 | Carolina Benone | Carolina L. Benone, Luiz C. S. Leite, Lu\'Is C. B. Crispino, Sam R.
Dolan | On-Axis scalar absorption cross section of Kerr-Newman black holes:
Geodesic analysis, sinc and low-frequency approximations | 12 pages, 3 figures. Conference proceedings of the 4th Amazonian
Symposium on Physics | Int. J Modern Phys. D 27, 1843012 (2018) | 10.1142/S0218271818430125 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate null geodesics impinging parallel to the rotation axis of a
Kerr-Newman black hole, and show that the absorption cross section for a
massless scalar field in the eikonal limit can be described in terms of the
photon orbit parameters. We compare our sinc and low-frequency approximations
with numerical r... | [
{
"created": "Fri, 21 Sep 2018 19:28:54 GMT",
"version": "v1"
}
] | 2018-09-25 | [
[
"Benone",
"Carolina L.",
""
],
[
"Leite",
"Luiz C. S.",
""
],
[
"Crispino",
"LuÍs C. B.",
""
],
[
"Dolan",
"Sam R.",
""
]
] | We investigate null geodesics impinging parallel to the rotation axis of a Kerr-Newman black hole, and show that the absorption cross section for a massless scalar field in the eikonal limit can be described in terms of the photon orbit parameters. We compare our sinc and low-frequency approximations with numerical res... |
2009.06176 | Vyacheslav Dokuchaev | Victor A. Berezin, Vyacheslav I. Dokuchaev, Yury N. Eroshenko and
Aleksey L. Smirnov | Quadratic Gravity, double layers and non-conservative energy-momentum
tensor | 20 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we investigate the conservative conditions in Quadratic
Gravity. It is shown explicitly that the Bianchi identities lead to the
conservative condition of the left-hand-side of the (gravitational) field
equation. Therefore, the total energy-momentum tensor is conservative in the
bulk (like in Gene... | [
{
"created": "Mon, 14 Sep 2020 03:37:24 GMT",
"version": "v1"
}
] | 2020-09-15 | [
[
"Berezin",
"Victor A.",
""
],
[
"Dokuchaev",
"Vyacheslav I.",
""
],
[
"Eroshenko",
"Yury N.",
""
],
[
"Smirnov",
"Aleksey L.",
""
]
] | In the present paper we investigate the conservative conditions in Quadratic Gravity. It is shown explicitly that the Bianchi identities lead to the conservative condition of the left-hand-side of the (gravitational) field equation. Therefore, the total energy-momentum tensor is conservative in the bulk (like in Genera... |
gr-qc/0112010 | Luis Herrera | L. Herrera | On the effective inertial mass density of a dissipative fluid | 10 pages Latex, to appear in Phys. Lett. A | Phys.Lett.A300:157-161,2002 | 10.1016/S0375-9601(01)00818-0 | null | gr-qc astro-ph cond-mat math-ph math.MP | null | It is shown that the effective inertial mass density of a dissipative fluid
just after leaving the equilibrium, on a time scale of the order of relaxation
time, reduces by a factor which depends on dissipative variables. Prospective
applications of this result to cosmological and astrophysical scenarios are
discussed... | [
{
"created": "Fri, 7 Dec 2001 16:22:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Herrera",
"L.",
""
]
] | It is shown that the effective inertial mass density of a dissipative fluid just after leaving the equilibrium, on a time scale of the order of relaxation time, reduces by a factor which depends on dissipative variables. Prospective applications of this result to cosmological and astrophysical scenarios are discussed. |
2211.09344 | Haopeng Yan | Yanming Su, Minyong Guo, Haopeng Yan and Bin Chen | Photon emissions from Kerr equatorial geodesic orbits | 22 pages, 7 figures | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We consider the light emitters moving freely along the geodesics on the
equatorial plane near a Kerr black hole and study the observability of these
emitters. To do so, we assume these emitters emit the photons isotropically and
monochromatically, and we compute the photon escaping probability (PEP) and the
maximum o... | [
{
"created": "Thu, 17 Nov 2022 05:12:41 GMT",
"version": "v1"
}
] | 2022-11-18 | [
[
"Su",
"Yanming",
""
],
[
"Guo",
"Minyong",
""
],
[
"Yan",
"Haopeng",
""
],
[
"Chen",
"Bin",
""
]
] | We consider the light emitters moving freely along the geodesics on the equatorial plane near a Kerr black hole and study the observability of these emitters. To do so, we assume these emitters emit the photons isotropically and monochromatically, and we compute the photon escaping probability (PEP) and the maximum obs... |
1706.01829 | David Hilditch | David Hilditch, Andreas Weyhausen, Bernd Bruegmann | Evolutions of centered Brill waves with a pseudospectral method | 11 pages, 5 figures | Phys. Rev. D 96, 104051 (2017) | 10.1103/PhysRevD.96.104051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The pseudospectral code bamps is used to evolve axisymmetric gravitational
waves. We consider a one-parameter family of Brill wave initial data, taking
the seed function and strength parameter of Holz et. al. A careful comparison
is made to earlier work. Our results are mostly in agreement with the
literature, but we... | [
{
"created": "Tue, 6 Jun 2017 16:06:25 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Hilditch",
"David",
""
],
[
"Weyhausen",
"Andreas",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | The pseudospectral code bamps is used to evolve axisymmetric gravitational waves. We consider a one-parameter family of Brill wave initial data, taking the seed function and strength parameter of Holz et. al. A careful comparison is made to earlier work. Our results are mostly in agreement with the literature, but we d... |
1808.05453 | John Bero | John J. Bero, John T. Whelan | An Analytic Approximation to the Bayesian Detection Statistic for
Continuous Gravitational Waves | null | Classical and Quantum Gravity, Volume 36, Number 1 (2019) | 10.1088/1361-6382/aaed6a | LIGO-P1800060-v5 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Bayesian detection statistic for a targeted search for
continuous gravitational waves, known as the $\mathcal{B}$-statistic. This is a
Bayes factor between signal and noise hypotheses, produced by marginalizing
over the four amplitude parameters of the signal. We show that by
Taylor-expanding to first... | [
{
"created": "Thu, 16 Aug 2018 12:47:48 GMT",
"version": "v1"
}
] | 2018-12-19 | [
[
"Bero",
"John J.",
""
],
[
"Whelan",
"John T.",
""
]
] | We consider the Bayesian detection statistic for a targeted search for continuous gravitational waves, known as the $\mathcal{B}$-statistic. This is a Bayes factor between signal and noise hypotheses, produced by marginalizing over the four amplitude parameters of the signal. We show that by Taylor-expanding to first o... |
1611.05262 | Wlodzimierz Piechocki | Wlodzimierz Piechocki and Grzegorz Plewa | Structures arising in the asymptotic dynamics of the Bianchi IX model | Mistake in the form of Hamiltonian has been found | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the analyses of the asymptotic evolution of the general Bianchi IX
spacetime using Hamiltonian formulation. The dynamics reveals the existence of
special structures, which we call wiggles, in the physical phase space. The
wiggles are different from the spikes known in the context of evolution of some
space... | [
{
"created": "Wed, 16 Nov 2016 13:06:42 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2016 07:46:36 GMT",
"version": "v2"
},
{
"created": "Sun, 27 Nov 2016 08:21:58 GMT",
"version": "v3"
},
{
"created": "Sat, 14 Jan 2017 13:54:27 GMT",
"version": "v4"
},
{
"c... | 2018-04-16 | [
[
"Piechocki",
"Wlodzimierz",
""
],
[
"Plewa",
"Grzegorz",
""
]
] | We present the analyses of the asymptotic evolution of the general Bianchi IX spacetime using Hamiltonian formulation. The dynamics reveals the existence of special structures, which we call wiggles, in the physical phase space. The wiggles are different from the spikes known in the context of evolution of some spaceti... |
gr-qc/0503108 | \'Arp\'ad Luk\'acs | Zoltan Perjes and Arpad Lukacs | Canonical quantization and black hole perturbations | Contribution to the XIXth Max Born Symposium, Wroclaw. 10 pages,
LaTeX, no figures | null | 10.1063/1.1923341 | null | gr-qc | null | We examine the possibility of a constraint-free quantization of linearized
gravity, based on the Teukolsky equation for black hole perturbations. We
exhibit a simple quadratic (but complex) Lagrangian for the Teukolsky equation,
leading to the interpretation that the elementary excitations (gravitons bound
to the Ker... | [
{
"created": "Fri, 25 Mar 2005 15:04:07 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Perjes",
"Zoltan",
""
],
[
"Lukacs",
"Arpad",
""
]
] | We examine the possibility of a constraint-free quantization of linearized gravity, based on the Teukolsky equation for black hole perturbations. We exhibit a simple quadratic (but complex) Lagrangian for the Teukolsky equation, leading to the interpretation that the elementary excitations (gravitons bound to the Kerr ... |
gr-qc/9911115 | Hans Ringstrom | Hans Ringstrom | Curvature blow up in Bianchi VIII and IX vacuum spacetimes | 20 pages, no figures. Submitted to Classical and Quantum Gravity | Class.Quant.Grav. 17 (2000) 713-731 | 10.1088/0264-9381/17/4/301 | null | gr-qc | null | The maximal globally hyperbolic development of non-Taub-NUT Bianchi IX vacuum
initial data and of non-NUT Bianchi VIII vacuum initial data is C2
inextendible. Furthermore, a curvature invariant is unbounded in the incomplete
directions of inextendible causal geodesics.
| [
{
"created": "Mon, 29 Nov 1999 10:17:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Ringstrom",
"Hans",
""
]
] | The maximal globally hyperbolic development of non-Taub-NUT Bianchi IX vacuum initial data and of non-NUT Bianchi VIII vacuum initial data is C2 inextendible. Furthermore, a curvature invariant is unbounded in the incomplete directions of inextendible causal geodesics. |
0903.1914 | Nima Khosravi | N. Khosravi and H. R. Sepangi | Probabilistic Evolutionary Process: a possible solution to the problem
of time in quantum cosmology and creation from nothing | To appear in PLB | Phys.Lett.B673:297-302,2009 | 10.1016/j.physletb.2009.02.045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method, which we shall call the probabilistic evolutionary
process, based on the probabilistic nature of quantum theory to offer a
possible solution to the problem of time in quantum cosmology. It offers an
alternative for perceiving an arrow of time which is compatible with the
thermodynamical arrow of ... | [
{
"created": "Wed, 11 Mar 2009 06:27:24 GMT",
"version": "v1"
}
] | 2009-05-06 | [
[
"Khosravi",
"N.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We present a method, which we shall call the probabilistic evolutionary process, based on the probabilistic nature of quantum theory to offer a possible solution to the problem of time in quantum cosmology. It offers an alternative for perceiving an arrow of time which is compatible with the thermodynamical arrow of ti... |
2010.05354 | Ioannis Antoniou | Ioannis Antoniou | Black hole or Gravastar? The GW190521 case | 5 pages, 1 figure, matched the publised version | Parana J. Sci. Educ., v.8, n.8, (14-18), November 1, 2022 | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of cosmological compact objects with very strong gravity is a
prediction of General Relativity and an exact solution of the Einstein
equations. These objects are called black holes and recently we had the first
observations of them. However, the theory of black hole formation has some
disadvantages. In ... | [
{
"created": "Sun, 11 Oct 2020 21:58:52 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Aug 2021 21:43:31 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Dec 2022 12:41:35 GMT",
"version": "v3"
}
] | 2022-12-09 | [
[
"Antoniou",
"Ioannis",
""
]
] | The existence of cosmological compact objects with very strong gravity is a prediction of General Relativity and an exact solution of the Einstein equations. These objects are called black holes and recently we had the first observations of them. However, the theory of black hole formation has some disadvantages. In or... |
1512.04766 | Jorge Pullin | Nahuel Barrios, Rodolfo Gambini, Jorge Pullin | Stress energy tensor renormalization for a spherically symmetric massive
scalar field on a quantum space-time | 5 pages, ws-procs975x65, prepared for the Proceedings of the 14th
Marcel Grossmann meeting | null | null | LSU-REL-121815 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a massive scalar field living on the recently found exact quantum
space-time corresponding to vacuum spherically symmetric loop quantum gravity.
The discreteness of the quantum space time naturally regularizes the scalar
field, eliminating divergences. However, the resulting finite theory depends on
the d... | [
{
"created": "Tue, 15 Dec 2015 12:53:17 GMT",
"version": "v1"
}
] | 2015-12-16 | [
[
"Barrios",
"Nahuel",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We consider a massive scalar field living on the recently found exact quantum space-time corresponding to vacuum spherically symmetric loop quantum gravity. The discreteness of the quantum space time naturally regularizes the scalar field, eliminating divergences. However, the resulting finite theory depends on the det... |
2004.02337 | Miguel Cruz | V\'ictor H. C\'ardenas, Miguel Cruz, Samuel Lepe, Shin'ichi Nojiri and
Sergei D. Odintsov | Challenging matter creation models in the phantom divide | 13 pages, 7 figures. To appear in Physical Review D | Phys. Rev. D 101, 083530 (2020) | 10.1103/PhysRevD.101.083530 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a study both statistical and theoretical for cosmological models
of matter creation and their ability to describe effective phantom models of
dark energy. Such models are beyond the $\Lambda$CDM model since the resulting
cosmic expansion is not adiabatic. In fact, we show that this approach exhibits
transi... | [
{
"created": "Sun, 5 Apr 2020 22:29:16 GMT",
"version": "v1"
}
] | 2020-04-23 | [
[
"Cárdenas",
"Víctor H.",
""
],
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | We perform a study both statistical and theoretical for cosmological models of matter creation and their ability to describe effective phantom models of dark energy. Such models are beyond the $\Lambda$CDM model since the resulting cosmic expansion is not adiabatic. In fact, we show that this approach exhibits transien... |
gr-qc/0312097 | Joshua Faber | Joshua A. Faber, Philippe Grandcl\'ement, Frederic A. Rasio | Mergers of Irrotational Neutron Star Binaries in Conformally Flat
Gravity | 44 pages, 21 figures, 2 tables, RevTeX, submitted to PRD; revised and
updated | Phys.Rev. D69 (2004) 124036 | 10.1103/PhysRevD.69.124036 | null | gr-qc astro-ph | null | We present the first results from our new general relativistic, Lagrangian
hydrodynamics code, which treats gravity in the conformally flat (CF) limit.
The evolution of fluid configurations is described using smoothed particle
hydrodynamics (SPH), and the elliptic field equations of the CF formalism are
solved using ... | [
{
"created": "Mon, 22 Dec 2003 01:39:15 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Apr 2004 21:58:51 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Faber",
"Joshua A.",
""
],
[
"Grandclément",
"Philippe",
""
],
[
"Rasio",
"Frederic A.",
""
]
] | We present the first results from our new general relativistic, Lagrangian hydrodynamics code, which treats gravity in the conformally flat (CF) limit. The evolution of fluid configurations is described using smoothed particle hydrodynamics (SPH), and the elliptic field equations of the CF formalism are solved using sp... |
gr-qc/0311051 | Jose' P. S. Lemos | Jose' P. S. Lemos, Erick J. Weinberg | Quasi-Black Holes from Extremal Charged Dust | 18 pages | Phys.Rev. D69 (2004) 104004 | 10.1103/PhysRevD.69.104004 | CU-TP-1093, DF/IST-11.2003 | gr-qc astro-ph hep-th | null | One can construct families of static solutions that can be viewed as
interpolating between nonsingular spacetimes and those containing black holes.
Although everywhere nonsingular, these solutions come arbitrarily close to
having a horizon. To an observer in the exterior region, it becomes
increasingly difficulty to ... | [
{
"created": "Sat, 15 Nov 2003 19:46:28 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Lemos",
"Jose' P. S.",
""
],
[
"Weinberg",
"Erick J.",
""
]
] | One can construct families of static solutions that can be viewed as interpolating between nonsingular spacetimes and those containing black holes. Although everywhere nonsingular, these solutions come arbitrarily close to having a horizon. To an observer in the exterior region, it becomes increasingly difficulty to di... |
gr-qc/9801015 | Theodore A. Jacobson | Ted Jacobson | Black Hole Thermodynamics Today | 9 pages, report of parallel session chair, to appear in Proceedings
of the Eighth Marcel Grossmann Meeting, (World Scientific, 1998) | null | null | UMDGR-98-73 | gr-qc hep-th | null | A brief survey of the major themes and developments of black hole
thermodynamics in the 1990's is given, followed by summaries of the talks on
this subject at MG8 together with a bit of commentary, and closing with a look
towards the future.
| [
{
"created": "Wed, 7 Jan 1998 18:50:26 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jacobson",
"Ted",
""
]
] | A brief survey of the major themes and developments of black hole thermodynamics in the 1990's is given, followed by summaries of the talks on this subject at MG8 together with a bit of commentary, and closing with a look towards the future. |
1312.1112 | Ratbay Myrzakulov | Ertan G\"udekli, Aizhan Myrzakul and Ratbay Myrzakulov | Teleparallelism by inhomogeneous dark fluid | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate $f(T)$ cosmology and find an exact solution for
$f$ which gives a Little Rip cosmology. Also, considering accelerating
cosmology with dark matter, the time-dependent solution is found. For these
cases, by using solutions obtained from $f(T)$ gravity we find expressions for
$\omega$ and $... | [
{
"created": "Wed, 4 Dec 2013 11:22:46 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Dec 2014 13:36:28 GMT",
"version": "v2"
}
] | 2014-12-09 | [
[
"Güdekli",
"Ertan",
""
],
[
"Myrzakul",
"Aizhan",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this paper, we investigate $f(T)$ cosmology and find an exact solution for $f$ which gives a Little Rip cosmology. Also, considering accelerating cosmology with dark matter, the time-dependent solution is found. For these cases, by using solutions obtained from $f(T)$ gravity we find expressions for $\omega$ and $\L... |
gr-qc/9409031 | Troy Schilling | Troy A. Schilling | Bibliography of Publications related to Classical and Quantum Gravity in
terms of the Ashtekar Variables | 18 pages, LaTeX | null | null | null | gr-qc | null | This bibliography attempts to give a comprehensive overview of all the
literature related to the Ashtekar variables. The original version was compiled
by Peter H\"ubner in 1989, and it has been subsequently updated by Gabriela
Gonzalez, Bernd Br\"ugmann, and Troy Schilling. Information about additional
literature, ne... | [
{
"created": "Wed, 14 Sep 1994 20:27:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schilling",
"Troy A.",
""
]
] | This bibliography attempts to give a comprehensive overview of all the literature related to the Ashtekar variables. The original version was compiled by Peter H\"ubner in 1989, and it has been subsequently updated by Gabriela Gonzalez, Bernd Br\"ugmann, and Troy Schilling. Information about additional literature, new ... |
gr-qc/9509048 | Andrew Chamblin | Andrew Chamblin (DAMTP, Cambridge) | Some applications of differential topology in general relativity | 24 pages LaTeX, 8 xfig figures available from A. Chamblin at
H.A.Chamblin@amtp.cam.ac.uk, published in Jour. of Geometry and Physics, 13,
pages 357-377 (1994) | J.Geom.Phys. 13 (1994) 357-377 | 10.1016/0393-0440(94)90015-9 | DAMTP R93/12 | gr-qc | null | Recently, there have been several applications of differential and algebraic
topology to problems concerned with the global structure of spacetimes. In this
paper, we derive obstructions to the existence of spin-Lorentz and pin-Lorentz
cobordisms and we show that for compact spacetimes with non-empty boundary
there i... | [
{
"created": "Mon, 25 Sep 1995 21:18:16 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Chamblin",
"Andrew",
"",
"DAMTP, Cambridge"
]
] | Recently, there have been several applications of differential and algebraic topology to problems concerned with the global structure of spacetimes. In this paper, we derive obstructions to the existence of spin-Lorentz and pin-Lorentz cobordisms and we show that for compact spacetimes with non-empty boundary there is ... |
1812.05009 | Esteban Gonz\'alez | Norman Cruz, Esteban Gonz\'alez and Guillermo Palma | Exact analytical solution for an Israel-Stewart Cosmology | 12 pages, 3 figures. We have partially rewritten the article
emphasizing the mathematical aspects related to the new analytical solution
found in the frame of a causal Israel-Stewart cosmology. The title as well as
the abstract were slightly modified according to the former resubmission of
the paper | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we report a novel analytic solution for a cosmological model
with a matter content described by a one component dissipative fluid, in the
framework of the causal Israel-Stewart theory. Some physically well motivated
analytical relations for the bulk viscous coefficient, the relaxation time and
a bario... | [
{
"created": "Wed, 12 Dec 2018 16:33:33 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2019 21:10:11 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Aug 2019 21:31:06 GMT",
"version": "v3"
}
] | 2019-08-15 | [
[
"Cruz",
"Norman",
""
],
[
"González",
"Esteban",
""
],
[
"Palma",
"Guillermo",
""
]
] | In this article we report a novel analytic solution for a cosmological model with a matter content described by a one component dissipative fluid, in the framework of the causal Israel-Stewart theory. Some physically well motivated analytical relations for the bulk viscous coefficient, the relaxation time and a bariotr... |
1402.1427 | Bernard J. Carr | B. J. Carr | The Black Hole Uncertainty Principle Correspondence | 8 pages, 4 figures, to appear in Proceedings of 2013 Karl
Schwarzschild Meeting on Gravitational Physics, eds. P. Nicolini, J. Mureika,
M. Kaminski, M. Bleicher | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Black Hole Uncertainty Principle correspondence proposes a connection
between the Uncertainty Principle on microscopic scales and black holes on
macroscopic scales. This is manifested in a unified expression for the Compton
wavelength and Schwarzschild radius. It is a natural consequence of the
Generalized Uncert... | [
{
"created": "Thu, 6 Feb 2014 17:36:32 GMT",
"version": "v1"
}
] | 2014-02-07 | [
[
"Carr",
"B. J.",
""
]
] | The Black Hole Uncertainty Principle correspondence proposes a connection between the Uncertainty Principle on microscopic scales and black holes on macroscopic scales. This is manifested in a unified expression for the Compton wavelength and Schwarzschild radius. It is a natural consequence of the Generalized Uncertai... |
1512.02262 | Mengjie Wang | Mengjie Wang and Carlos Herdeiro | Maxwell perturbations on Kerr-anti-de Sitter: quasinormal modes,
superradiant instabilities and vector clouds | 15 pages, 3 tables, 10 figures | Phys. Rev. D 93, 064066 (2016) | 10.1103/PhysRevD.93.064066 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar and gravitational perturbations on Kerr-anti-de Sitter (Kerr-AdS)
black holes have been addressed in the literature and have been shown to
exhibit a rich phenomenology. In this paper we complete the analysis of bosonic
fields on this background by studying Maxwell perturbations, focusing on
superradiant instab... | [
{
"created": "Mon, 7 Dec 2015 21:57:21 GMT",
"version": "v1"
}
] | 2016-04-06 | [
[
"Wang",
"Mengjie",
""
],
[
"Herdeiro",
"Carlos",
""
]
] | Scalar and gravitational perturbations on Kerr-anti-de Sitter (Kerr-AdS) black holes have been addressed in the literature and have been shown to exhibit a rich phenomenology. In this paper we complete the analysis of bosonic fields on this background by studying Maxwell perturbations, focusing on superradiant instabil... |
1808.07303 | Martin Lesourd Mr | Martin Lesourd | Causal structure of evaporating black holes | null | Classical and Quantum Gravity, Volume 36, Number 2, 2018 | 10.1088/1361-6382/aaf5f8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We offer a mathematically rigorous basis for the widely held suspicion that
full black hole evaporation is in tension with predictability. Based on
conditions expressing the global causal structure of evaporating black hole
spacetimes, we prove two theorems in Lorentzian geometry showing that such
spacetimes either f... | [
{
"created": "Wed, 22 Aug 2018 10:22:36 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Sep 2018 16:45:14 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Sep 2018 08:36:06 GMT",
"version": "v3"
},
{
"created": "Sun, 14 Oct 2018 16:41:12 GMT",
"version": "v4"
}
] | 2019-01-16 | [
[
"Lesourd",
"Martin",
""
]
] | We offer a mathematically rigorous basis for the widely held suspicion that full black hole evaporation is in tension with predictability. Based on conditions expressing the global causal structure of evaporating black hole spacetimes, we prove two theorems in Lorentzian geometry showing that such spacetimes either fai... |
1903.05223 | Stefan Danilishin L. | Stefan L. Danilishin and Farid Ya. Khalili and Haixing Miao | Advanced quantum techniques for future gravitational-wave detectors | Review article for the Living Reviews in Relativity journal | null | 10.1007/s41114-019-0018-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum fluctuation of light limits the sensitivity of advanced laser
interferometric gravitational-wave detectors. It is one of the principal
obstacles on the way towards the next-generation gravitational-wave
observatories. The envisioned significant improvement of the detector
sensitivity requires using quantum no... | [
{
"created": "Tue, 12 Mar 2019 21:22:22 GMT",
"version": "v1"
}
] | 2019-05-08 | [
[
"Danilishin",
"Stefan L.",
""
],
[
"Khalili",
"Farid Ya.",
""
],
[
"Miao",
"Haixing",
""
]
] | Quantum fluctuation of light limits the sensitivity of advanced laser interferometric gravitational-wave detectors. It is one of the principal obstacles on the way towards the next-generation gravitational-wave observatories. The envisioned significant improvement of the detector sensitivity requires using quantum non-... |
2407.15565 | Shahram Jalalzadeh | R. Jalalzadeh, S. Jalalzadeh, B. Malekolkalami, and Z. Davari | Observational constraints on FLRW, Bianchi type I and V brane models | 12 pages, 8 figures, to appear in Physics of the Dark Universe | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | This study explores the compatibility of Covariant Extrinsic Gravity (CEG)
with current cosmological observations. We employ the chi-square statistic and
Markov Chain Monte Carlo (MCMC) methods to fit the FLRW and Bianchi type-I and
V brane models to the latest datasets, including Hubble, Pantheon+ Supernova
samples,... | [
{
"created": "Mon, 22 Jul 2024 11:51:38 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Jalalzadeh",
"R.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Malekolkalami",
"B.",
""
],
[
"Davari",
"Z.",
""
]
] | This study explores the compatibility of Covariant Extrinsic Gravity (CEG) with current cosmological observations. We employ the chi-square statistic and Markov Chain Monte Carlo (MCMC) methods to fit the FLRW and Bianchi type-I and V brane models to the latest datasets, including Hubble, Pantheon+ Supernova samples, B... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.