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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2004.12137 | Abolhassan Mohammadi | Abolhassan Mohammadi, Tayeb Golanbari, Salah Nasri, Khaled Saaidi | Brane Constant-roll Inflation | 20 pages, 6 figures; Typos fixed; references added, accepted for
publication in PRD | Phys. Rev. D 101, 123537 (2020) | 10.1103/PhysRevD.101.123537 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scenario of constant-roll inflation in the frame of the RSII brane
gravity model is considered. Based on the scenario, the smallness of the second
slow-roll parameter is released and it is assumed as a constant which could be
of the order of unity. Applying the Hamilton-Jacobi formalism, the constancy of
the para... | [
{
"created": "Sat, 25 Apr 2020 13:14:09 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2020 21:06:18 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Jul 2020 10:32:56 GMT",
"version": "v3"
}
] | 2020-07-08 | [
[
"Mohammadi",
"Abolhassan",
""
],
[
"Golanbari",
"Tayeb",
""
],
[
"Nasri",
"Salah",
""
],
[
"Saaidi",
"Khaled",
""
]
] | The scenario of constant-roll inflation in the frame of the RSII brane gravity model is considered. Based on the scenario, the smallness of the second slow-roll parameter is released and it is assumed as a constant which could be of the order of unity. Applying the Hamilton-Jacobi formalism, the constancy of the parame... |
2207.00878 | Genly Le\'on | Miguel A. Garc\'ia-Aspeitia, Guillermo Fernandez-Anaya, A.
Hern\'andez-Almada, Genly Leon (Catolica del Norte U. and DUT, Durban) and
Juan Maga\~na | Cosmology under the fractional calculus approach | 15 pages, 8 figures. Moderate revision. Matches the version accepted
for publication in MNRAS | null | 10.1093/mnras/stac3006 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fractional cosmology modifies the standard derivative to Caputo's fractional
derivative of order $\mu$, generating changes in General Relativity. Friedmann
equations are modified, and the evolution of the species densities depends on
$\mu$ and the age of the Universe $t_U$. We estimate stringent constraints on
$\mu$ ... | [
{
"created": "Sat, 2 Jul 2022 16:48:06 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jul 2022 15:11:45 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Oct 2022 14:10:31 GMT",
"version": "v3"
}
] | 2022-10-26 | [
[
"García-Aspeitia",
"Miguel A.",
"",
"Catolica del Norte U. and DUT, Durban"
],
[
"Fernandez-Anaya",
"Guillermo",
"",
"Catolica del Norte U. and DUT, Durban"
],
[
"Hernández-Almada",
"A.",
"",
"Catolica del Norte U. and DUT, Durban"
],
[
"Leon",
"... | Fractional cosmology modifies the standard derivative to Caputo's fractional derivative of order $\mu$, generating changes in General Relativity. Friedmann equations are modified, and the evolution of the species densities depends on $\mu$ and the age of the Universe $t_U$. We estimate stringent constraints on $\mu$ us... |
2001.05716 | Diego Pavon | Diego Pavon | On the degrees of freedom of a black hole | 8 pages, no figures. Key words: gravity, black holes, statistical
mechanics, equipartition theorem. Comments appreciated | null | null | 523 UAB | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By examining whether black holes fulfill the theorem of equipartition of
energy we find that the notion of degrees of freedom, previously introduced for
cosmic horizons, is meaningful in the case of Schwarzschild and Kerr black
holes. However, for Reissner-N\"{o}rdstrom and Kerr-Newman black holes this
notion fails.
| [
{
"created": "Thu, 16 Jan 2020 09:45:03 GMT",
"version": "v1"
}
] | 2020-01-24 | [
[
"Pavon",
"Diego",
""
]
] | By examining whether black holes fulfill the theorem of equipartition of energy we find that the notion of degrees of freedom, previously introduced for cosmic horizons, is meaningful in the case of Schwarzschild and Kerr black holes. However, for Reissner-N\"{o}rdstrom and Kerr-Newman black holes this notion fails. |
0807.1689 | Joao Magueijo | Joao Magueijo | Bimetric varying speed of light theories and primordial fluctuations | null | Phys.Rev.D79:043525,2009 | 10.1103/PhysRevD.79.043525 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We exhibit a varying speed of light (VSL) theory that implements the recently
proposed decaying speed of sound mechanism for generating density fluctuations.
We avail ourselves of bimetric VSL theories, where the speed of gravity differs
from that of light. We first show that a Dirac-Born-Infeld (DBI) type of
$K$-ess... | [
{
"created": "Thu, 10 Jul 2008 16:01:12 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Jan 2010 17:41:28 GMT",
"version": "v2"
}
] | 2010-01-29 | [
[
"Magueijo",
"Joao",
""
]
] | We exhibit a varying speed of light (VSL) theory that implements the recently proposed decaying speed of sound mechanism for generating density fluctuations. We avail ourselves of bimetric VSL theories, where the speed of gravity differs from that of light. We first show that a Dirac-Born-Infeld (DBI) type of $K$-essen... |
gr-qc/9508005 | Charles Torre | C. G. Torre (Utah State Univ.) | Spinors, Jets, and the Einstein Equations | to appear in the proceedings of the Sixth Canadian Conference on
General Relativity and Relativistic Astrophysics, 13 pages, uses AMSTeX and
AMSppt.sty | null | null | null | gr-qc | null | Many important features of a field theory, {\it e.g.}, conserved currents,
symplectic structures, energy-momentum tensors, {\it etc.}, arise as tensors
locally constructed from the fields and their derivatives. Such tensors are
naturally defined as geometric objects on the jet space of solutions to the
field equation... | [
{
"created": "Thu, 3 Aug 1995 16:35:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Torre",
"C. G.",
"",
"Utah State Univ."
]
] | Many important features of a field theory, {\it e.g.}, conserved currents, symplectic structures, energy-momentum tensors, {\it etc.}, arise as tensors locally constructed from the fields and their derivatives. Such tensors are naturally defined as geometric objects on the jet space of solutions to the field equations.... |
2104.14031 | Jiri Horak | Marek Abramowicz, Ji\v{r}\'i Hor\'ak and Kate\v{r}ina
Klimovi\v{c}ov\'a | Wave-fronts of gravitational waves partially trapped in ultra-compact
stars | 4 pages, 3 figures, to appear in proceedings of "Recontres de Moriond
on Gravitation 2021" conference | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We dedicate this work to Dr Omer Blaes, professor of physics at UCSB, on the
occasion of his sixtieth birthday. We have been collaborating now and then with
Dr. Blaes on problems involving oscillations, waves and stability. Happy
birthday, Omer. Enjoy the analytic treatment of damping of the gravitational
waves trapp... | [
{
"created": "Wed, 28 Apr 2021 21:42:08 GMT",
"version": "v1"
}
] | 2021-04-30 | [
[
"Abramowicz",
"Marek",
""
],
[
"Horák",
"Jiří",
""
],
[
"Klimovičová",
"Kateřina",
""
]
] | We dedicate this work to Dr Omer Blaes, professor of physics at UCSB, on the occasion of his sixtieth birthday. We have been collaborating now and then with Dr. Blaes on problems involving oscillations, waves and stability. Happy birthday, Omer. Enjoy the analytic treatment of damping of the gravitational waves trapped... |
gr-qc/0405067 | Norichika Sago | Norichika Sago, Kunihito Ioka, Takashi Nakamura, Ryo Yamazaki | Gravitational Wave Memory of Gamma-Ray Burst Jets | Revtex4, 10 pages, 6 figures, Fig.2 and Fig.3 replaced, minor changes
to text in Sec.I and Sec.V, typos corrected, some reference added, Version to
be published in PRD | Phys.Rev.D70:104012,2004 | 10.1103/PhysRevD.70.104012 | OU-TAP-230, IGPC-04/5-2,KUNS-1916 | gr-qc astro-ph | null | Gamma-Ray Bursts (GRBs) are now considered as relativistic jets. We analyze
the gravitational waves from the acceleration stage of the GRB jets. We show
that (i) the point mass approximation is not appropriate if the opening
half-angle of the jet is larger than the inverse of the Lorentz factor of the
jet, (ii) the g... | [
{
"created": "Thu, 13 May 2004 05:03:32 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Nov 2004 10:00:10 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Sago",
"Norichika",
""
],
[
"Ioka",
"Kunihito",
""
],
[
"Nakamura",
"Takashi",
""
],
[
"Yamazaki",
"Ryo",
""
]
] | Gamma-Ray Bursts (GRBs) are now considered as relativistic jets. We analyze the gravitational waves from the acceleration stage of the GRB jets. We show that (i) the point mass approximation is not appropriate if the opening half-angle of the jet is larger than the inverse of the Lorentz factor of the jet, (ii) the gra... |
0712.4333 | Anil Zengino\u{g}lu C | An{\i}l Zengino\u{g}lu | Hyperboloidal foliations and scri-fixing | 14 pages, 14 figures. Published version | Class.Quant.Grav.25:145002,2008 | 10.1088/0264-9381/25/14/145002 | AEI-2007-177 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a gauge choice which allows us to avoid the introduction of
artificial timelike outer boundaries in numerical studies of test fields based
on a 3+1 decomposition of asymptotically flat background spacetimes. The main
idea is to include null infinity in the computational domain by conformally
compactifying ... | [
{
"created": "Fri, 28 Dec 2007 14:03:57 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jun 2008 17:31:59 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Zenginoğlu",
"Anıl",
""
]
] | We discuss a gauge choice which allows us to avoid the introduction of artificial timelike outer boundaries in numerical studies of test fields based on a 3+1 decomposition of asymptotically flat background spacetimes. The main idea is to include null infinity in the computational domain by conformally compactifying th... |
2007.11584 | Carlos A. R. Herdeiro | Nicolas Sanchis-Gual, Miguel Zilh\~ao, Carlos Herdeiro, Fabrizio Di
Giovanni, Jos\'e A. Font, Eugen Radu | Synchronised gravitational atoms from mergers of bosonic stars | 6 pages, 7 figures | Phys. Rev. D 102, 101504 (2020) | 10.1103/PhysRevD.102.101504 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If ultralight bosonic fields exist in Nature as dark matter, superradiance
spins down rotating black holes (BHs), dynamically endowing them with
equilibrium bosonic clouds, here dubbed synchronised gravitational atoms
(SGAs). The self-gravity of these same fields, on the other hand, can lump them
into (scalar or vect... | [
{
"created": "Wed, 22 Jul 2020 18:00:00 GMT",
"version": "v1"
}
] | 2020-11-25 | [
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Zilhão",
"Miguel",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Di Giovanni",
"Fabrizio",
""
],
[
"Font",
"José A.",
""
],
[
"Radu",
"Eugen",
""
]
] | If ultralight bosonic fields exist in Nature as dark matter, superradiance spins down rotating black holes (BHs), dynamically endowing them with equilibrium bosonic clouds, here dubbed synchronised gravitational atoms (SGAs). The self-gravity of these same fields, on the other hand, can lump them into (scalar or vector... |
1505.07014 | Caio Macedo | Caio F. B. Macedo, Ednilton S. de Oliveira, Lu\'is C. B. Crispino | Scattering by regular black holes: Planar massless scalar waves
impinging upon a Bardeen black hole | 8 pages, 7 figures. Version to be published in PRD | null | 10.1103/PhysRevD.92.024012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Singularities are common features of general relativity black holes. However,
within general relativity, one can construct black holes that present no
singularities. These regular black hole solutions can be achieved by, for
instance, relaxing one of the energy conditions on the stress energy tensor
sourcing the blac... | [
{
"created": "Tue, 26 May 2015 15:36:20 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jun 2015 21:24:52 GMT",
"version": "v2"
}
] | 2016-03-08 | [
[
"Macedo",
"Caio F. B.",
""
],
[
"de Oliveira",
"Ednilton S.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Singularities are common features of general relativity black holes. However, within general relativity, one can construct black holes that present no singularities. These regular black hole solutions can be achieved by, for instance, relaxing one of the energy conditions on the stress energy tensor sourcing the black ... |
1204.1483 | Hrvoje Stefancic | Silvije Domazet, Hrvoje Stefancic | Renormalization group scale-setting from the action - a road to modified
gravity theories | v1: 15 pages; v2: shortened to 10 pages, main results unchanged,
published in Class. Quant. Grav | null | 10.1088/0264-9381/29/23/235005 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The renormalization group (RG) corrected gravitational action in
Einstein-Hilbert and other truncations is considered. The running scale of the
renormalization group is treated as a scalar field at the level of the action
and determined in a scale-setting procedure recently introduced by Koch and
Ramirez for the Eins... | [
{
"created": "Fri, 6 Apr 2012 14:23:38 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Nov 2012 11:02:59 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Domazet",
"Silvije",
""
],
[
"Stefancic",
"Hrvoje",
""
]
] | The renormalization group (RG) corrected gravitational action in Einstein-Hilbert and other truncations is considered. The running scale of the renormalization group is treated as a scalar field at the level of the action and determined in a scale-setting procedure recently introduced by Koch and Ramirez for the Einste... |
2206.04836 | Shin'ichi Nojiri | G.G.L. Nashed and S. Nojiri | Black Holes with Electric and Magnetic Charges in $F(R)$ Gravity | LaTeX 20 pages, 9 figures, to appear in Fortschritte der Physik -
Progress of Physics | null | 10.1002/prop.202200091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct spherically symmetric and static solutions in $F(R)$ gravity
coupled with electromagnetic fields. The solutions include new types of black
holes with electric and magnetic charges. We show that the higher-derivative
terms make the curvature singularity much softer than that in the charged black
holes in ... | [
{
"created": "Fri, 10 Jun 2022 01:44:46 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Nov 2022 23:01:21 GMT",
"version": "v2"
}
] | 2023-03-22 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Nojiri",
"S.",
""
]
] | We construct spherically symmetric and static solutions in $F(R)$ gravity coupled with electromagnetic fields. The solutions include new types of black holes with electric and magnetic charges. We show that the higher-derivative terms make the curvature singularity much softer than that in the charged black holes in Ei... |
2003.09719 | Wan Cong Ms | Wan Cong, Jiri Bicak, David Kubiznak and Robert B. Mann | Quantum Distinction of Inertial Frames: Local vs. Global | 6 pages, 4 figures | null | 10.1103/PhysRevD.101.104060 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the response function of Unruh-deWitt detectors placed in a flat
spacetime inside a thin matter shell. We show that the response function
distinguishes between the local and global (Minkowski) inertial frames and
picks up the presence of the shell even when the detector is switched on for a
finite time inter... | [
{
"created": "Sat, 21 Mar 2020 18:31:15 GMT",
"version": "v1"
},
{
"created": "Tue, 12 May 2020 01:27:36 GMT",
"version": "v2"
}
] | 2020-06-10 | [
[
"Cong",
"Wan",
""
],
[
"Bicak",
"Jiri",
""
],
[
"Kubiznak",
"David",
""
],
[
"Mann",
"Robert B.",
""
]
] | We study the response function of Unruh-deWitt detectors placed in a flat spacetime inside a thin matter shell. We show that the response function distinguishes between the local and global (Minkowski) inertial frames and picks up the presence of the shell even when the detector is switched on for a finite time interva... |
2108.12930 | Naoki Seto | Naoki Seto | Correlation of Gravitational Wave Background Noises and Statistical Loss
for Angular Averaged Sensitivity Curves | 11 pages, 10 figures | null | 10.1103/PhysRevD.104.063025 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave backgrounds generate correlated noises to separated
detectors. This correlation can induce statistical losses to actual detector
networks, compared with idealized noise-independent networks. Assuming that the
backgrounds are isotropic, we examine the statistical losses specifically for
the angular ... | [
{
"created": "Sun, 29 Aug 2021 22:40:49 GMT",
"version": "v1"
}
] | 2021-09-29 | [
[
"Seto",
"Naoki",
""
]
] | Gravitational wave backgrounds generate correlated noises to separated detectors. This correlation can induce statistical losses to actual detector networks, compared with idealized noise-independent networks. Assuming that the backgrounds are isotropic, we examine the statistical losses specifically for the angular av... |
gr-qc/0008019 | Keith H. Lockitch | Keith H. Lockitch, Nils Andersson, John L. Friedman | The rotational modes of relativistic stars: Analytic results | 36 pages revtex v3.1, 2 eps figures | Phys.Rev. D63 (2001) 024019 | 10.1103/PhysRevD.63.024019 | CGPG-99/12-2 | gr-qc astro-ph | null | We study the r-modes and rotational ``hybrid'' modes of relativistic stars.
As in Newtonian gravity, the spectrum of low-frequency rotational modes is
highly sensitive to the stellar equation of state. If the star and its
perturbations obey the same one-parameter equation of state (as with isentropic
stars), there ex... | [
{
"created": "Tue, 8 Aug 2000 21:59:22 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Lockitch",
"Keith H.",
""
],
[
"Andersson",
"Nils",
""
],
[
"Friedman",
"John L.",
""
]
] | We study the r-modes and rotational ``hybrid'' modes of relativistic stars. As in Newtonian gravity, the spectrum of low-frequency rotational modes is highly sensitive to the stellar equation of state. If the star and its perturbations obey the same one-parameter equation of state (as with isentropic stars), there exis... |
1402.5921 | Ronald Adler | Ronald J. Adler | A quantum theory of distance along a curve | 27 pages, 3 figures; includes added reference and acknowledgements,
corrected typos and phrases, results unchanged | null | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a quantum theory of distances along a curve, based on a linear
line element that is equal to the operator square root of the quadratic metric
of Riemannian geometry. Since the linear line element is an operator, we treat
it according to the rules of quantum mechanics and interpret its eigenvalues as
physic... | [
{
"created": "Thu, 13 Feb 2014 23:57:15 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Apr 2014 17:34:04 GMT",
"version": "v2"
}
] | 2014-05-06 | [
[
"Adler",
"Ronald J.",
""
]
] | We present a quantum theory of distances along a curve, based on a linear line element that is equal to the operator square root of the quadratic metric of Riemannian geometry. Since the linear line element is an operator, we treat it according to the rules of quantum mechanics and interpret its eigenvalues as physical... |
1911.09902 | Huaifan Li | Xiong-Ying Guo, Huai-Fan Li, Li-Chun Zhang, Ren Zhao | Continuous phase transition and microstructure of charged AdS black hole
with quintessence | 25 pages,4 figures,added refs. arXiv admin note: text overlap with
arXiv:1901.04703 | Eur. Phys. J. C (2020) 80:168 | 10.1140/epjc/s10052-019-7601-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previously, the Maxwell equal-area law has been used to discuss the
conditions satisfied by the phase transition of charged AdS black holes with
cloud of string and quintessence, and it was concluded that black holes have
phase transition similar to that of vdW system. The phase transition depends on
the electric pot... | [
{
"created": "Fri, 22 Nov 2019 07:38:55 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Nov 2019 10:57:36 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Feb 2020 09:49:51 GMT",
"version": "v3"
}
] | 2020-03-02 | [
[
"Guo",
"Xiong-Ying",
""
],
[
"Li",
"Huai-Fan",
""
],
[
"Zhang",
"Li-Chun",
""
],
[
"Zhao",
"Ren",
""
]
] | Previously, the Maxwell equal-area law has been used to discuss the conditions satisfied by the phase transition of charged AdS black holes with cloud of string and quintessence, and it was concluded that black holes have phase transition similar to that of vdW system. The phase transition depends on the electric poten... |
2312.08392 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | Supporting traversable wormholes: the case for noncommutative geometry | 9 pages, no figures. arXiv admin note: substantial text overlap with
arXiv:2312.05266 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While wormholes may be just as good a prediction of Einstein's theory as
black holes, they are subject to severe restrictions from quantum field theory.
In particular, a wormhole can only be held open by violating the null energy
condition, calling for the existence of "exotic matter," a condition that many
researche... | [
{
"created": "Tue, 12 Dec 2023 16:32:05 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Jan 2024 21:13:05 GMT",
"version": "v2"
},
{
"created": "Sun, 5 May 2024 21:34:01 GMT",
"version": "v3"
}
] | 2024-05-07 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | While wormholes may be just as good a prediction of Einstein's theory as black holes, they are subject to severe restrictions from quantum field theory. In particular, a wormhole can only be held open by violating the null energy condition, calling for the existence of "exotic matter," a condition that many researchers... |
gr-qc/0611020 | Janne Hogdahl | Kari Enqvist, Janne Hogdahl, Sami Nurmi, Filippo Vernizzi | Covariant generalization of cosmological perturbation theory | Minor changes to match the version published in PRD. RevTex, 22
pages, 1 figure | Phys.Rev.D75:023515,2007 | 10.1103/PhysRevD.75.023515 | HIP-2006-48/TH | gr-qc astro-ph | null | We present an approach to cosmological perturbations based on a covariant
perturbative expansion between two worldlines in the real inhomogeneous
universe. As an application, at an arbitrary order we define an exact scalar
quantity which describes the inhomogeneities in the number of e-folds on
uniform density hypers... | [
{
"created": "Fri, 3 Nov 2006 15:18:53 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2007 14:14:20 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Enqvist",
"Kari",
""
],
[
"Hogdahl",
"Janne",
""
],
[
"Nurmi",
"Sami",
""
],
[
"Vernizzi",
"Filippo",
""
]
] | We present an approach to cosmological perturbations based on a covariant perturbative expansion between two worldlines in the real inhomogeneous universe. As an application, at an arbitrary order we define an exact scalar quantity which describes the inhomogeneities in the number of e-folds on uniform density hypersur... |
0711.0576 | Sergey Paston | S.A. Paston, V.A. Franke | Canonical formulation of the embedded theory of gravity equivalent to
Einstein's General Relativity | LaTeX, 17 pages | Theor.Math.Phys.153:1581-1595,2007; Teor.Mat.Fiz.153:271-288,2007 | 10.1007/s11232-007-0134-9 | null | gr-qc hep-th | null | We study the approach in which independent variables describing gravity are
functions of the space-time embedding into a flat space of higher dimension. We
formulate a canonical formalism for such a theory in a form, which requires
imposing additional constraints, which are a part of Einstein's equations. As a
result... | [
{
"created": "Mon, 5 Nov 2007 08:59:42 GMT",
"version": "v1"
}
] | 2010-03-09 | [
[
"Paston",
"S. A.",
""
],
[
"Franke",
"V. A.",
""
]
] | We study the approach in which independent variables describing gravity are functions of the space-time embedding into a flat space of higher dimension. We formulate a canonical formalism for such a theory in a form, which requires imposing additional constraints, which are a part of Einstein's equations. As a result, ... |
gr-qc/0101101 | Vladimir V. Dyadichev | D.V. Gal'tsov and V.V. Dyadichev | Solitons in Non-Abelian Born-Infeld Theory | 2pges, LaTeX, Contribution to the 9th Marcel Grossmann meeting (MG9),
Rome, July 2000 | null | 10.1142/9789812777386_0181 | DTP-MSU-0020 | gr-qc | null | Born-Infeld generalization of the Yang-Mills action suggested by the
superstring theory gives rise to modification of previously known as well as to
some new classical soliton solutions. Earlier it was shown that within the
model with the usual trace over the group generators classical glueballs exist
which form an i... | [
{
"created": "Fri, 26 Jan 2001 12:21:14 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Gal'tsov",
"D. V.",
""
],
[
"Dyadichev",
"V. V.",
""
]
] | Born-Infeld generalization of the Yang-Mills action suggested by the superstring theory gives rise to modification of previously known as well as to some new classical soliton solutions. Earlier it was shown that within the model with the usual trace over the group generators classical glueballs exist which form an inf... |
1207.3715 | Eugen Radu | Eugen Radu and Bintoro Subagyo | Spinning scalar solitons in anti-de Sitter spacetime | 12 pages, 4 figures | null | 10.1016/j.physletb.2012.09.050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present spinning Q-balls and boson stars in four dimensional anti-de
Sitter spacetime. These are smooth, horizonless solutions for gravity coupled
to a massive complex scalar field with a harmonic dependence on time and the
azimuthal angle. Similar to the flat spacetime configurations, the angular
momentum is quan... | [
{
"created": "Mon, 16 Jul 2012 16:01:13 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Radu",
"Eugen",
""
],
[
"Subagyo",
"Bintoro",
""
]
] | We present spinning Q-balls and boson stars in four dimensional anti-de Sitter spacetime. These are smooth, horizonless solutions for gravity coupled to a massive complex scalar field with a harmonic dependence on time and the azimuthal angle. Similar to the flat spacetime configurations, the angular momentum is quanti... |
gr-qc/9708061 | M. B. Paranjape | A. Edery M. B. Paranjape | Cosmological sector for localized mass and spin in 2+1 dimensional
topologically massive gravity | 8 pages, no figures | Phys.Lett.B415:344-348,1997 | 10.1016/S0370-2693(97)01221-5 | UdeM-GPP-TH-97-45 | gr-qc | null | The cosmological sector to the full non-linear topologically massive gravity
(TMG) is obtained for localized sources of mass $m$ and spin $\sigma$ besides
the asymptotically spinning conical flat sector previously obtained. In a small
region near but outside the sources, the metric resembles the spinning conical
flat... | [
{
"created": "Mon, 25 Aug 1997 19:44:42 GMT",
"version": "v1"
}
] | 2008-12-30 | [
[
"Paranjape",
"A. Edery M. B.",
""
]
] | The cosmological sector to the full non-linear topologically massive gravity (TMG) is obtained for localized sources of mass $m$ and spin $\sigma$ besides the asymptotically spinning conical flat sector previously obtained. In a small region near but outside the sources, the metric resembles the spinning conical flat m... |
1412.6467 | Matthew Robbins | Saurya Das, Matthew P. G. Robbins, Mark A. Walton | Generalized Uncertainty Principle Corrections to the Simple Harmonic
Oscillator in Phase Space | minor revisions; included journal reference | Canadian Journal of Physics, 2016, 94(1): 139-146 | 10.1139/cjp-2015-0456 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute Wigner functions for the harmonic oscillator including corrections
from generalized uncertainty principles (GUPs), and study the corresponding
marginal probability densities and other properties. We show that the GUP
corrections to the Wigner functions can be significant, and comment on their
potential mea... | [
{
"created": "Fri, 19 Dec 2014 18:07:15 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jul 2015 17:26:18 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Jan 2016 21:16:25 GMT",
"version": "v3"
}
] | 2016-01-28 | [
[
"Das",
"Saurya",
""
],
[
"Robbins",
"Matthew P. G.",
""
],
[
"Walton",
"Mark A.",
""
]
] | We compute Wigner functions for the harmonic oscillator including corrections from generalized uncertainty principles (GUPs), and study the corresponding marginal probability densities and other properties. We show that the GUP corrections to the Wigner functions can be significant, and comment on their potential measu... |
gr-qc/0610006 | Jose Luis Jaramillo | J.L. Jaramillo, M. Ansorg, F. Limousin | Numerical implementation of isolated horizon boundary conditions | 11 pages, 5 figures, references added and corrected | Phys.Rev.D75:024019,2007 | 10.1103/PhysRevD.75.024019 | null | gr-qc | null | We study the numerical implementation of a set of boundary conditions derived
from the isolated horizon formalism, and which characterize a black hole whose
horizon is in quasi-equilibrium. More precisely, we enforce these geometrical
prescriptions as inner boundary conditions on an excised sphere, in the
numerical r... | [
{
"created": "Mon, 2 Oct 2006 10:11:13 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Oct 2006 10:17:44 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jaramillo",
"J. L.",
""
],
[
"Ansorg",
"M.",
""
],
[
"Limousin",
"F.",
""
]
] | We study the numerical implementation of a set of boundary conditions derived from the isolated horizon formalism, and which characterize a black hole whose horizon is in quasi-equilibrium. More precisely, we enforce these geometrical prescriptions as inner boundary conditions on an excised sphere, in the numerical res... |
gr-qc/0201097 | Dag Østvang | Dag {\O}stvang | Spherically Symmetric, Metrically Static, Isolated Systems in
Quasi-Metric Gravity | 34 pages; v2: connection changed; v3: extended and local conservation
laws changed; v4: major revision; v5: accepted for publication in G&C, v6:
must have non-universal gravitational coupling; v7: fully coupled theory
implemented; v8: fully coupled theory abandoned; v11: inconsistent equation
replaced (oh well)... | Grav.Cosmol.13:1-15,2007 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational field exterior respectively interior to a spherically
symmetric, isolated body made of perfect fluid is examined within the
quasi-metric framework (QMF). It is required that the gravitational field is
"metrically static", meaning that it is static except for the effects of the
global cosmic expansio... | [
{
"created": "Thu, 31 Jan 2002 16:59:13 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2023 15:01:35 GMT",
"version": "v10"
},
{
"created": "Wed, 20 Mar 2024 15:28:38 GMT",
"version": "v11"
},
{
"created": "Sat, 4 May 2002 17:29:54 GMT",
"version": "v2"
},
{
"c... | 2024-03-21 | [
[
"Østvang",
"Dag",
""
]
] | The gravitational field exterior respectively interior to a spherically symmetric, isolated body made of perfect fluid is examined within the quasi-metric framework (QMF). It is required that the gravitational field is "metrically static", meaning that it is static except for the effects of the global cosmic expansion ... |
1007.2790 | John F. Donoghue | Thibault Damour and John F. Donoghue | Phenomenology of the Equivalence Principle with Light Scalars | 5 pages | Class.Quant.Grav.27:202001,2010 | 10.1088/0264-9381/27/20/202001 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Light scalar particles with couplings of sub-gravitational strength, which
can generically be called 'dilatons', can produce violations of the equivalence
principle. However, in order to understand experimental sensitivities one must
know the coupling of these scalars to atomic systems. We report here on a study
of t... | [
{
"created": "Fri, 16 Jul 2010 15:11:17 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jul 2010 00:12:33 GMT",
"version": "v2"
}
] | 2011-03-28 | [
[
"Damour",
"Thibault",
""
],
[
"Donoghue",
"John F.",
""
]
] | Light scalar particles with couplings of sub-gravitational strength, which can generically be called 'dilatons', can produce violations of the equivalence principle. However, in order to understand experimental sensitivities one must know the coupling of these scalars to atomic systems. We report here on a study of the... |
1212.2204 | Martin Bojowald | Stephon Alexander, Martin Bojowald, Antonino Marciano, David Simpson | Electric Time in Quantum Cosmology | 19 pages, 5 figures | Class. Quantum Grav. 30 (2013) 155024 | 10.1088/0264-9381/30/15/155024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Effective quantum cosmology is formulated with a realistic global internal
time given by the electric vector potential. New possibilities for the quantum
behavior of space-time are found, and the high-density regime is shown to be
very sensitive to the specific form of state realized.
| [
{
"created": "Mon, 10 Dec 2012 20:59:45 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Alexander",
"Stephon",
""
],
[
"Bojowald",
"Martin",
""
],
[
"Marciano",
"Antonino",
""
],
[
"Simpson",
"David",
""
]
] | Effective quantum cosmology is formulated with a realistic global internal time given by the electric vector potential. New possibilities for the quantum behavior of space-time are found, and the high-density regime is shown to be very sensitive to the specific form of state realized. |
1402.6613 | Brajesh Gupt | Peter Diener, Brajesh Gupt, Parampreet Singh | Numerical simulations of a loop quantum cosmos: robustness of the
quantum bounce and the validity of effective dynamics | 47 pages, 26 figures; References updated. Minor changes to match the
version published in CQG | Class. Quantum Grav. 31 105015 (2014) | 10.1088/0264-9381/31/10/105015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A key result of isotropic loop quantum cosmology is the existence of a
quantum bounce which occurs when the energy density of the matter field
approaches a universal maximum close to the Planck density. Though the bounce
has been exhibited in various matter models, due to severe computational
challenges some importan... | [
{
"created": "Wed, 26 Feb 2014 17:07:10 GMT",
"version": "v1"
},
{
"created": "Fri, 16 May 2014 16:41:36 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Diener",
"Peter",
""
],
[
"Gupt",
"Brajesh",
""
],
[
"Singh",
"Parampreet",
""
]
] | A key result of isotropic loop quantum cosmology is the existence of a quantum bounce which occurs when the energy density of the matter field approaches a universal maximum close to the Planck density. Though the bounce has been exhibited in various matter models, due to severe computational challenges some important ... |
gr-qc/0401107 | Miguel Lorente | P. Kramer, M. Lorente | Surface embedding, topology and dualization for spin networks | LaTeX 17 pages, 6 eps figures (late submission to arxiv.org) | J.Phys.A35:8563-8574,2002 | 10.1088/0305-4470/35/40/314 | null | gr-qc | null | Spin networks are graphs derived from 3nj symbols of angular momentum. The
surface embedding, the topology and dualization of these networks are
considered. Embeddings into compact surfaces include the orientable sphere S^2
and the torus T, and the not orientable projective space P^2 and Klein's bottle
K. Two familie... | [
{
"created": "Tue, 27 Jan 2004 18:11:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kramer",
"P.",
""
],
[
"Lorente",
"M.",
""
]
] | Spin networks are graphs derived from 3nj symbols of angular momentum. The surface embedding, the topology and dualization of these networks are considered. Embeddings into compact surfaces include the orientable sphere S^2 and the torus T, and the not orientable projective space P^2 and Klein's bottle K. Two families ... |
gr-qc/0505050 | Badiali Jean Pierre | J.P. Badiali | Entropy: From Black Holes to Ordinary Systems | null | J.Phys. A39 (2006) 7175-7186 | 10.1088/0305-4470/39/23/001 | null | gr-qc | null | Several results of black holes thermodynamics can be considered as firmly
founded and formulated in a very general manner. From this starting point we
analyse in which way these results may give us the opportunity to gain a better
understanding in the thermodynamics of ordinary systems for which a
pre-relativistic de... | [
{
"created": "Wed, 11 May 2005 15:56:58 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Badiali",
"J. P.",
""
]
] | Several results of black holes thermodynamics can be considered as firmly founded and formulated in a very general manner. From this starting point we analyse in which way these results may give us the opportunity to gain a better understanding in the thermodynamics of ordinary systems for which a pre-relativistic desc... |
1603.00637 | Yi Xie | Shan-Shan Zhao and Yi Xie | Strong field gravitational lensing by a charged Galileon black hole | null | JCAP07(2016)007 | 10.1088/1475-7516/2016/07/007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Strong field gravitational lensings are dramatically disparate from those in
the weak field by representing relativistic images due to light winds one to
infinity loops around a lens before escaping. We study such a lensing caused by
a charged Galileon black hole, which is expected to have possibility to evade
no-hai... | [
{
"created": "Wed, 2 Mar 2016 09:54:52 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jun 2016 14:01:17 GMT",
"version": "v2"
}
] | 2016-07-11 | [
[
"Zhao",
"Shan-Shan",
""
],
[
"Xie",
"Yi",
""
]
] | Strong field gravitational lensings are dramatically disparate from those in the weak field by representing relativistic images due to light winds one to infinity loops around a lens before escaping. We study such a lensing caused by a charged Galileon black hole, which is expected to have possibility to evade no-hair ... |
2012.09888 | Ammar Kasem | Ammar Kasem and Shaaban Khalil | Quantum Cosmology with vector torsion | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the treatment of quantum cosmology to a manifold with torsion. We
adopt a model of Einstein-Cartan-Sciama-Kibble compatible with the cosmological
principle. The universe wavefunction will be subject to a
$\mathcal{PT}$-symmetric Hamiltonian. With a vanishing energy-momentum tensor,
the universe evolution in... | [
{
"created": "Thu, 17 Dec 2020 19:12:31 GMT",
"version": "v1"
}
] | 2020-12-22 | [
[
"Kasem",
"Ammar",
""
],
[
"Khalil",
"Shaaban",
""
]
] | We extend the treatment of quantum cosmology to a manifold with torsion. We adopt a model of Einstein-Cartan-Sciama-Kibble compatible with the cosmological principle. The universe wavefunction will be subject to a $\mathcal{PT}$-symmetric Hamiltonian. With a vanishing energy-momentum tensor, the universe evolution in t... |
2406.08501 | \'Alvaro Mozota Frauca | \'Alvaro Mozota Frauca | Foundational Issues in Group Field Theory | null | Found Phys 54, 33 (2024) | 10.1007/s10701-024-00763-9 | null | gr-qc physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | In this paper I offer an introduction to group field theory (GFT) and to some
of the issues affecting the foundations of this approach to quantum gravity. I
first introduce covariant GFT as the theory that one obtains by interpreting
the amplitudes of certain spin foam models as Feynman amplitudes in a
perturbative e... | [
{
"created": "Wed, 22 May 2024 08:10:55 GMT",
"version": "v1"
}
] | 2024-06-14 | [
[
"Frauca",
"Álvaro Mozota",
""
]
] | In this paper I offer an introduction to group field theory (GFT) and to some of the issues affecting the foundations of this approach to quantum gravity. I first introduce covariant GFT as the theory that one obtains by interpreting the amplitudes of certain spin foam models as Feynman amplitudes in a perturbative exp... |
gr-qc/0212087 | Gilad Gour | Gilad Gour | Extensive Entropy Bounds | 8 pages, revtex, To appear in Phys. Rev. D | Phys.Rev. D67 (2003) 127501 | 10.1103/PhysRevD.67.127501 | null | gr-qc cond-mat.stat-mech hep-th quant-ph | null | It is shown that, for systems in which the entropy is an extensive function
of the energy and volume, the Bekenstein and the holographic entropy bounds
predict new results. More explicitly, the Bekenstein entropy bound leads to the
entropy of thermal radiation (the Unruh-Wald bound) and the spherical entropy
bound im... | [
{
"created": "Fri, 20 Dec 2002 20:47:30 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Apr 2003 21:03:29 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Gour",
"Gilad",
""
]
] | It is shown that, for systems in which the entropy is an extensive function of the energy and volume, the Bekenstein and the holographic entropy bounds predict new results. More explicitly, the Bekenstein entropy bound leads to the entropy of thermal radiation (the Unruh-Wald bound) and the spherical entropy bound impl... |
gr-qc/0307084 | Cosimo Stornaiolo | V.I. Manko, G. Marmo, C. Stornaiolo | Radon transform of Wheeler-De Witt equation and tomography of quantum
states of the universe | 22 pages LaTeX, some minor corrections, new references added,
submitted to General Relativity and Gravitation | Gen.Rel.Grav. 37 (2005) 99-114 | 10.1007/s10714-005-0005-3 | null | gr-qc | null | The notion of standard positive probability distribution function (tomogram)
which describes the quantum state of universe alternatively to wave function or
to density matrix is introduced. Connection of the tomographic probability
distribution with the Wigner function of the universe and with the star-product
(defor... | [
{
"created": "Thu, 17 Jul 2003 15:46:03 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Apr 2004 09:57:01 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Manko",
"V. I.",
""
],
[
"Marmo",
"G.",
""
],
[
"Stornaiolo",
"C.",
""
]
] | The notion of standard positive probability distribution function (tomogram) which describes the quantum state of universe alternatively to wave function or to density matrix is introduced. Connection of the tomographic probability distribution with the Wigner function of the universe and with the star-product (deforma... |
2405.19282 | Edward Kurianovich | E. A. Kurianovich, A.I. Mikhailov, I. V. Volovich | On the theory of relativistic Brownian motion | null | p-Adic Numbers, Ultrametric Analysis and Applications 16 (2024) 2 | null | null | gr-qc math.PR | http://creativecommons.org/licenses/by/4.0/ | The approach to the theory of a relativistic random process is considered by
the path integral method as Brownian motion taking into account the boundedness
of speed. An attempt was made to build a relativistic analogue of the Wiener
measure as a weak limit of finite-difference approximations. A formula has been
prop... | [
{
"created": "Wed, 29 May 2024 17:14:34 GMT",
"version": "v1"
}
] | 2024-05-30 | [
[
"Kurianovich",
"E. A.",
""
],
[
"Mikhailov",
"A. I.",
""
],
[
"Volovich",
"I. V.",
""
]
] | The approach to the theory of a relativistic random process is considered by the path integral method as Brownian motion taking into account the boundedness of speed. An attempt was made to build a relativistic analogue of the Wiener measure as a weak limit of finite-difference approximations. A formula has been propos... |
2206.12671 | Carlos A. S. Almeida | F. C. E. Lima, A. R. P. Moreira, and C. A. S. Almeida | Properties of black hole vortex in Einstein's gravity | 22 pages, 7 captioned figures. Enhanced version to appear in European
Physical Journal Plus | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the influence of the matter field and the gauge field on the
metric functions of the AdS$_3$ spacetime of the Maxwell-Higgs model. By
considering a matter field with a solitonic profile with the ability to adjust
the field variable from kink to compact-like configurations, the appearance of
black hole ... | [
{
"created": "Sat, 25 Jun 2022 15:27:31 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Apr 2023 18:39:01 GMT",
"version": "v2"
}
] | 2023-05-02 | [
[
"Lima",
"F. C. E.",
""
],
[
"Moreira",
"A. R. P.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | We investigate the influence of the matter field and the gauge field on the metric functions of the AdS$_3$ spacetime of the Maxwell-Higgs model. By considering a matter field with a solitonic profile with the ability to adjust the field variable from kink to compact-like configurations, the appearance of black hole so... |
2004.00336 | Carlos A. R. Herdeiro | Carlos A. R. Herdeiro and Eugen Radu | Spherical electro-vacuum black holes with resonant, scalar $Q$-hair | 18 pages, 5 figures; v2. typos corrected, matches published version | null | 10.1140/epjc/s10052-020-7976-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotically flat, spherical, electro-vacuum black holes (BHs) are
shown to support static, spherical configurations of a gauged,
self-interacting, scalar field, minimally coupled to the geometry. Considering
a $Q$-ball type potential for the scalar field, we dub these configurations
$Q$-clouds, in the test fie... | [
{
"created": "Wed, 1 Apr 2020 10:56:04 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 2020 13:42:28 GMT",
"version": "v2"
}
] | 2020-06-24 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | The asymptotically flat, spherical, electro-vacuum black holes (BHs) are shown to support static, spherical configurations of a gauged, self-interacting, scalar field, minimally coupled to the geometry. Considering a $Q$-ball type potential for the scalar field, we dub these configurations $Q$-clouds, in the test field... |
1003.1680 | Sergei Winitzki | Sergei Winitzki | Observability of the total inflationary expansion | 11 pages, RevTeX, no figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I consider the question of possible observability of the total number of
e-folds accumulated during the epoch of inflation. The total number of
observable e-folds has been previously constrained by the de Sitter entropy
after inflation, assuming that the null energy condition (NEC) holds. The NEC
is violated by upwar... | [
{
"created": "Mon, 8 Mar 2010 17:16:42 GMT",
"version": "v1"
}
] | 2010-03-09 | [
[
"Winitzki",
"Sergei",
""
]
] | I consider the question of possible observability of the total number of e-folds accumulated during the epoch of inflation. The total number of observable e-folds has been previously constrained by the de Sitter entropy after inflation, assuming that the null energy condition (NEC) holds. The NEC is violated by upward ... |
gr-qc/9912007 | Mamdouh Wanas | M.I. Wanas and M.E. Kahil | Quantum Features of Non-Symmetric Geometries | Eight pages Latex file, published in GRG, vol.31, 1921, (1999) | Gen.Rel.Grav. 31 (1999) 1921 | 10.1023/A:1026743007086 | null | gr-qc | null | Paths in an appropriate geometry are usually used as trajectories of test
particles in geometric theories of gravity. It is shown that non-symmetric
geometries possess some interesting quantum features. Without carrying out any
quantization schemes, paths in such geometries are naturally quantized. Two
different non-... | [
{
"created": "Thu, 2 Dec 1999 12:57:12 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Wanas",
"M. I.",
""
],
[
"Kahil",
"M. E.",
""
]
] | Paths in an appropriate geometry are usually used as trajectories of test particles in geometric theories of gravity. It is shown that non-symmetric geometries possess some interesting quantum features. Without carrying out any quantization schemes, paths in such geometries are naturally quantized. Two different non-sy... |
1704.02747 | Ken-Ichi Nakao | Yumi Akai and Ken-ichi Nakao | Non-linear stability of a brane wormhole | 32 pages, 10 figure. arXiv admin note: substantial text overlap with
arXiv:1306.6917 | Phys. Rev. D 96, 024033 (2017) | 10.1103/PhysRevD.96.024033 | OCU-PHYS-461, AP-GR-136 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically study the non-linear stability of a spherically symmetric
wormhole supported by an infinitesimally thin brane of negative tension, which
has been devised by Barcelo and Visser. We consider a situation in which a thin
spherical shell composed of dust falls into an initially static wormhole; The
dust sh... | [
{
"created": "Mon, 10 Apr 2017 08:06:55 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Apr 2017 07:56:14 GMT",
"version": "v2"
}
] | 2017-07-26 | [
[
"Akai",
"Yumi",
""
],
[
"Nakao",
"Ken-ichi",
""
]
] | We analytically study the non-linear stability of a spherically symmetric wormhole supported by an infinitesimally thin brane of negative tension, which has been devised by Barcelo and Visser. We consider a situation in which a thin spherical shell composed of dust falls into an initially static wormhole; The dust shel... |
2210.09823 | Jean-David Pailleron | Jean-David Pailleron | A class of solutions to the conformal constraint equations on compact
manifolds with apparent horizon boundary conditions | 42 pages | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is dedicated to solving the Einstein constraint equations with
apparent horizon boundaries and freely specified mean curvature. The main
novelty is that we study the conformal constraint equations assuming only low
regularity.
| [
{
"created": "Tue, 18 Oct 2022 13:04:32 GMT",
"version": "v1"
}
] | 2022-10-19 | [
[
"Pailleron",
"Jean-David",
""
]
] | This article is dedicated to solving the Einstein constraint equations with apparent horizon boundaries and freely specified mean curvature. The main novelty is that we study the conformal constraint equations assuming only low regularity. |
2307.04873 | Francisco X. Linares Cede\~no | Francisco X. Linares Cede\~no and Ulises Nucamendi | Gauge fixing in cosmological perturbations of Unimodular Gravity | 32 pages, new text and references added. Version accepted for
publication in JCAP | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With focus on the cosmological evolution of linear perturbations of matter
and geometry, we calculate the equivalent expressions to that of the Newtonian
and Synchronous gauges within the framework of Unimodular Gravity, being these
two gauges commonly used and implemented in Boltzmann codes. An important
aspect of o... | [
{
"created": "Mon, 10 Jul 2023 19:50:36 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jul 2023 18:55:31 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Oct 2023 16:54:36 GMT",
"version": "v3"
}
] | 2023-10-04 | [
[
"Cedeño",
"Francisco X. Linares",
""
],
[
"Nucamendi",
"Ulises",
""
]
] | With focus on the cosmological evolution of linear perturbations of matter and geometry, we calculate the equivalent expressions to that of the Newtonian and Synchronous gauges within the framework of Unimodular Gravity, being these two gauges commonly used and implemented in Boltzmann codes. An important aspect of our... |
2312.00706 | Vojtech Pravda | Marcello Ortaggio, Vojtech Pravda, Alena Pravdova | Kerr-Schild double copy for Kundt spacetimes of any dimension | 26 pages, minor changes, new references added, matches version to
appear in JHEP | J. High Energy Phys. 2024, 69 (2024) | 10.1007/JHEP02(2024)069 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that vacuum type N Kundt spacetimes in an arbitrary dimension admit a
Kerr-Schild (KS) double copy. This is mostly done in a coordinate-independent
way using the higher-dimensional Newman-Penrose formalism. We also discuss two
kinds of non-uniqueness of an electromagnetic field corresponding to a given KS
met... | [
{
"created": "Fri, 1 Dec 2023 16:42:01 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Feb 2024 16:39:53 GMT",
"version": "v2"
}
] | 2024-02-15 | [
[
"Ortaggio",
"Marcello",
""
],
[
"Pravda",
"Vojtech",
""
],
[
"Pravdova",
"Alena",
""
]
] | We show that vacuum type N Kundt spacetimes in an arbitrary dimension admit a Kerr-Schild (KS) double copy. This is mostly done in a coordinate-independent way using the higher-dimensional Newman-Penrose formalism. We also discuss two kinds of non-uniqueness of an electromagnetic field corresponding to a given KS metri... |
1604.04734 | Joao Paulo Morais Graca | J. P. Morais Gra\c{c}a, Godonou I. Salako and V. B. Bezerra | Quasinormal modes of a black hole with a cloud of strings in
Einstein-Gauss-Bonnet gravity | 15 pages, 7 figures; To appear in IJMPD | null | 10.1142/S0218271817501139 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quasinormal modes for a scalar field in the background spacetime
corresponding to a black hole, with a cloud of strings, in
Einstein-Gauss-Bonnet gravity, and the tensor quasinormal modes corresponding
to perturbations in such spacetime, were both calculated using the WKB
approximation. In the obtained results we... | [
{
"created": "Sat, 16 Apr 2016 12:07:03 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Apr 2017 23:46:56 GMT",
"version": "v2"
}
] | 2023-02-22 | [
[
"Graça",
"J. P. Morais",
""
],
[
"Salako",
"Godonou I.",
""
],
[
"Bezerra",
"V. B.",
""
]
] | The quasinormal modes for a scalar field in the background spacetime corresponding to a black hole, with a cloud of strings, in Einstein-Gauss-Bonnet gravity, and the tensor quasinormal modes corresponding to perturbations in such spacetime, were both calculated using the WKB approximation. In the obtained results we e... |
2311.17198 | Akshay Ghalsasi | Akshay Ghalsasi | Amplifying the Chirp: Using Deep Learning (U-Nets) to filter signal from
noise in LIGO data | 20 pages, 9 figures, comments welcome | null | null | PITT-PACC-2322 | gr-qc astro-ph.CO astro-ph.IM hep-ph | http://creativecommons.org/licenses/by/4.0/ | The direct detection of gravitational waves by LIGO has heralded a new era
for astronomy and physics. Typically the gravitational waves observed by LIGO
are dominated by noise. In this work we use Deep Convolutional Neural Networks
(specifically U-Nets) to filter a clean signal from noisy data. We present two
realiza... | [
{
"created": "Tue, 28 Nov 2023 20:04:27 GMT",
"version": "v1"
}
] | 2023-11-30 | [
[
"Ghalsasi",
"Akshay",
""
]
] | The direct detection of gravitational waves by LIGO has heralded a new era for astronomy and physics. Typically the gravitational waves observed by LIGO are dominated by noise. In this work we use Deep Convolutional Neural Networks (specifically U-Nets) to filter a clean signal from noisy data. We present two realizati... |
1502.00811 | Danylo Yerokhin | Yu.L. Bolotin, V.A. Cherkaskiy, O.A. Lemets, D.A. Yerokhin and L.G.
Zazunov | Cosmology In Terms Of The Deceleration Parameter. Part I | 67 pages, 6 figures. arXiv admin note: text overlap with
arXiv:1104.4458, arXiv:1409.3352, arXiv:0708.3414, arXiv:gr-qc/0508052,
arXiv:astro-ph/0402278, arXiv:astro-ph/0104349, arXiv:0807.0207 by other
authors | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the early seventies, Alan Sandage defined cosmology as the search for two
numbers: Hubble parameter ${{H}_{0}}$ and deceleration parameter ${{q}_{0}}$.
The first of the two basic cosmological parameters (the Hubble parameter)
describes the linear part of the time dependence of the scale factor. Treating
the Univer... | [
{
"created": "Tue, 3 Feb 2015 11:11:11 GMT",
"version": "v1"
}
] | 2015-02-04 | [
[
"Bolotin",
"Yu. L.",
""
],
[
"Cherkaskiy",
"V. A.",
""
],
[
"Lemets",
"O. A.",
""
],
[
"Yerokhin",
"D. A.",
""
],
[
"Zazunov",
"L. G.",
""
]
] | In the early seventies, Alan Sandage defined cosmology as the search for two numbers: Hubble parameter ${{H}_{0}}$ and deceleration parameter ${{q}_{0}}$. The first of the two basic cosmological parameters (the Hubble parameter) describes the linear part of the time dependence of the scale factor. Treating the Universe... |
1512.08623 | Patrick Das Gupta | Patrick Das Gupta and Eklavya Thareja | Supermassive Black Holes from self-gravitating Bose-Einstein Condensates
comprised of Ultra-light Bosonic Dark Matter | Presented the paper in ICGC 2015, IISER, Mohali, India, as well as in
GR21, July 2016, Columbia University, USA | Classical and Quantum Gravity, Volume 34, Number 3 (2017) | 10.1088/1361-6382/aa51fc | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observed active galactic nuclei at redshifts $\gtrsim 6$ suggest that
supermassive black holes (SMBHs) had formed early on. Accretion of matter onto
remnants of Population III stars leading to SMBHs is a very slow process, and
therefore, such models encounter difficulties in explaining quasars detected at
$ z \gtrsim... | [
{
"created": "Tue, 29 Dec 2015 08:53:20 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Apr 2016 15:09:31 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Nov 2016 06:02:20 GMT",
"version": "v3"
}
] | 2018-12-27 | [
[
"Gupta",
"Patrick Das",
""
],
[
"Thareja",
"Eklavya",
""
]
] | Observed active galactic nuclei at redshifts $\gtrsim 6$ suggest that supermassive black holes (SMBHs) had formed early on. Accretion of matter onto remnants of Population III stars leading to SMBHs is a very slow process, and therefore, such models encounter difficulties in explaining quasars detected at $ z \gtrsim 6... |
2103.15906 | Christian Boehmer | Christian G. Boehmer, Erik Jensko | Modified gravity: a unified approach | 34 pages, 2 figures; v2 minor changes, references added; v3 final
changes, published version | Phys. Rev. D 104, 024010 (2021) | 10.1103/PhysRevD.104.024010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the original Einstein action, sometimes called the Gamma
squared action, we propose a new setup to formulate modified theories of
gravity. This can yield a theory with second order field equations similar to
those found in other popular modified gravity models. Using a more general
setting the theory gi... | [
{
"created": "Mon, 29 Mar 2021 19:37:06 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 2021 14:54:39 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Jul 2021 11:55:34 GMT",
"version": "v3"
}
] | 2021-07-14 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Jensko",
"Erik",
""
]
] | Starting from the original Einstein action, sometimes called the Gamma squared action, we propose a new setup to formulate modified theories of gravity. This can yield a theory with second order field equations similar to those found in other popular modified gravity models. Using a more general setting the theory give... |
1112.6381 | A Khodam-Mohammadi | Antonio Pasqua, A. Khodam-Mohammadi, Mubasher Jamil, R. Myrzakulov | Interacting Ricci Dark Energy with Logarithmic Correction | 24 pages, accepted for publication in 'Astrophysics and Space
Science, DOI:10.1007/s10509-012-1031-8' | Astrophysics and Space Science: Volume 340, 199-208, (2012) | 10.1007/s10509-012-1031-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the holographic principle, it has been suggested that the dark
energy density may be inversely proportional to the area $A$ of the event
horizon of the universe. However, such a model would have a causality problem.
In this work, we consider the entropy-corrected version of the holographic dark
energy mo... | [
{
"created": "Thu, 29 Dec 2011 19:05:21 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Feb 2012 07:02:40 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Mar 2012 09:19:49 GMT",
"version": "v3"
},
{
"created": "Sat, 3 Mar 2012 20:10:57 GMT",
"version": "v4"
}
] | 2012-06-06 | [
[
"Pasqua",
"Antonio",
""
],
[
"Khodam-Mohammadi",
"A.",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Myrzakulov",
"R.",
""
]
] | Motivated by the holographic principle, it has been suggested that the dark energy density may be inversely proportional to the area $A$ of the event horizon of the universe. However, such a model would have a causality problem. In this work, we consider the entropy-corrected version of the holographic dark energy mode... |
2407.14954 | Erick Ivan Duque Gonzalez | Erick I. Duque | Emergent electromagnetism | 66 pages | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | We introduce the concept of emergent electric field. This is distinguished
from the fundamental one in that the emergent electric field directly appears
in observations through the Lorentz force, while the latter enters the phase
space as the canonical momentum of the electromagnetic field. In Hamiltonian
classical e... | [
{
"created": "Sat, 20 Jul 2024 18:14:37 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Duque",
"Erick I.",
""
]
] | We introduce the concept of emergent electric field. This is distinguished from the fundamental one in that the emergent electric field directly appears in observations through the Lorentz force, while the latter enters the phase space as the canonical momentum of the electromagnetic field. In Hamiltonian classical ele... |
gr-qc/0604013 | Parampreet Singh | Abhay Ashtekar, Tomasz Pawlowski, Parampreet Singh | Quantum Nature of the Big Bang: An Analytical and Numerical
Investigation | Revised version to appear in Physical Review D. References added and
typos corrected | Phys.Rev.D73:124038,2006 | 10.1103/PhysRevD.73.124038 | IGPG-06/03-2 | gr-qc hep-th | null | Analytical and numerical methods are developed to analyze the quantum nature
of the big bang in the setting of loop quantum cosmology. They enable one to
explore the effects of quantum geometry both on the gravitational and matter
sectors and significantly extend the known results on the resolution of the big
bang si... | [
{
"created": "Tue, 4 Apr 2006 19:03:37 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2006 18:29:12 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Jun 2006 17:54:59 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Pawlowski",
"Tomasz",
""
],
[
"Singh",
"Parampreet",
""
]
] | Analytical and numerical methods are developed to analyze the quantum nature of the big bang in the setting of loop quantum cosmology. They enable one to explore the effects of quantum geometry both on the gravitational and matter sectors and significantly extend the known results on the resolution of the big bang sing... |
2105.11690 | Jafar Khodagholizadeh | Jafar Khodagholizadeh, Amir H. Abbassi, Ali Vahedi and Komeil Babaei | Gravitational Waves in a Closed Spacetime via Deviation Equation | 22 pages, 11 figures | Results in Physics, Volume 26, July 2021, 104347 | 10.1016/j.rinp.2021.104347 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the closed universe, we obtain the amplitude and frequency of
gravitational waves in the terms of discrete wave numbers, wave propagation
time, and cosmological constant using the deviation equation in the first-order
perturbed metric. We demonstrate that the cosmological constant effect on GWs
is only seen in... | [
{
"created": "Tue, 25 May 2021 06:15:05 GMT",
"version": "v1"
}
] | 2021-05-27 | [
[
"Khodagholizadeh",
"Jafar",
""
],
[
"Abbassi",
"Amir H.",
""
],
[
"Vahedi",
"Ali",
""
],
[
"Babaei",
"Komeil",
""
]
] | Within the closed universe, we obtain the amplitude and frequency of gravitational waves in the terms of discrete wave numbers, wave propagation time, and cosmological constant using the deviation equation in the first-order perturbed metric. We demonstrate that the cosmological constant effect on GWs is only seen in t... |
2101.07147 | Vladimir Khatsymovsky | V.M. Khatsymovsky | On the Kerr metric in a synchronous reference frame | 9 pages, 1 figure | Int. J. Mod. Phys. D, Volume No. 30, Issue No. 10, Article No.
2150071, Year 2021 | 10.1142/S0218271821500711 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Kerr metric is considered in a synchronous frame of reference obtained by
using proper time and initial conditions for particles that freely move along a
certain set of trajectories as coordinates. Modifying these coordinates in a
certain way (keeping their interpretation as initial values at large
distances), we... | [
{
"created": "Mon, 18 Jan 2021 16:28:23 GMT",
"version": "v1"
}
] | 2021-08-26 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | The Kerr metric is considered in a synchronous frame of reference obtained by using proper time and initial conditions for particles that freely move along a certain set of trajectories as coordinates. Modifying these coordinates in a certain way (keeping their interpretation as initial values at large distances), we s... |
0804.0153 | Selcuk Bayin | Selcuk S. Bayin | Friedmann Thermodynamics and the Geometry of the Universe | Key note speech delivered in the International Conference on
Efficiency, Costs, Optimization, Simulation and Environmental Impact of
Energy Systems, ECOS'95 and ASME | Proceedings of ECOS' 95 and ASME, Y.A. Gogus, Y.A. Ozturk, G.
Tsatsaronis (eds.) Vol.1, pg. 3, 1995 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent article we have introduced Friedmann thermodynamics, where
certain geometric parameters in Friedmann models are treated like their
thermodynamic counterparts (temperature, entropy, Gibbs potential etc.). This
model has the advantage of allowing us to determine the geometry of the
universe by thermodynamic... | [
{
"created": "Tue, 1 Apr 2008 12:12:36 GMT",
"version": "v1"
}
] | 2008-04-02 | [
[
"Bayin",
"Selcuk S.",
""
]
] | In a recent article we have introduced Friedmann thermodynamics, where certain geometric parameters in Friedmann models are treated like their thermodynamic counterparts (temperature, entropy, Gibbs potential etc.). This model has the advantage of allowing us to determine the geometry of the universe by thermodynamic s... |
1010.5837 | Bei Lok Hu | B. L. Hu | Gravity and Nonequilibrium Thermodynamics of Classical Matter | 25 pages essay. Invited Talk at Mariofest, March 2010, Rosario,
Argentina. Festschrift to appear as an issue of IJMPD | Int.J.Mod.Phys.D20:697-716,2011 | 10.1142/S0218271811019049 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Renewed interest in deriving gravity (more precisely, the Einstein equations)
from thermodynamics considerations [1, 2] is stirred up by a recent proposal
that 'gravity is an entropic force' [3] (see also [4]). Even though I find the
arguments justifying such a claim in this latest proposal rather ad hoc and
simplist... | [
{
"created": "Thu, 28 Oct 2010 01:36:56 GMT",
"version": "v1"
}
] | 2011-05-25 | [
[
"Hu",
"B. L.",
""
]
] | Renewed interest in deriving gravity (more precisely, the Einstein equations) from thermodynamics considerations [1, 2] is stirred up by a recent proposal that 'gravity is an entropic force' [3] (see also [4]). Even though I find the arguments justifying such a claim in this latest proposal rather ad hoc and simplistic... |
gr-qc/9503067 | Carlo Rovelli | Carlo Rovelli | OUTLINE OF A GENERALLY COVARIANT QUANTUM FIELD THEORY AND A QUANTUM
THEORY OF GRAVITY | Latex file, 33 pages | J.Math.Phys.36:6529-6547,1995 | 10.1063/1.531255 | null | gr-qc | null | We study a tentative generally covariant quantum field theory, denoted the
T-Theory, as a tool to investigate the consistency of quantum general
relativity. The theory describes the gravitational field and a minimally
coupled scalar field; it is based on the loop representation, and on a certain
number of quantizatio... | [
{
"created": "Sat, 1 Apr 1995 14:45:13 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Rovelli",
"Carlo",
""
]
] | We study a tentative generally covariant quantum field theory, denoted the T-Theory, as a tool to investigate the consistency of quantum general relativity. The theory describes the gravitational field and a minimally coupled scalar field; it is based on the loop representation, and on a certain number of quantization ... |
2210.14049 | Naritaka Oshita | Naritaka Oshita and Daichi Tsuna | Slowly Decaying Ringdown of a Rapidly Spinning Black Hole: Probing the
No-Hair Theorem by Small Mass-Ratio Mergers with LISA | 8 pages, 8 figures, version accepted for publication in PRD | Phys. Rev. D 108, 104031 (2023) | 10.1103/PhysRevD.108.104031 | RIKEN-iTHEMS-Report-22, RESCEU-19/22, YITP-23-155 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The measurability of multiple quasinormal (QN) modes, including overtones and
higher harmonics, with the Laser Interferometer Space Antenna is investigated
by computing the gravitational wave (GW) signal induced by an intermediate or
extreme mass ratio merger involving a supermassive black hole (SMBH). We
confirm tha... | [
{
"created": "Tue, 25 Oct 2022 14:28:48 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2023 06:23:46 GMT",
"version": "v2"
}
] | 2023-12-01 | [
[
"Oshita",
"Naritaka",
""
],
[
"Tsuna",
"Daichi",
""
]
] | The measurability of multiple quasinormal (QN) modes, including overtones and higher harmonics, with the Laser Interferometer Space Antenna is investigated by computing the gravitational wave (GW) signal induced by an intermediate or extreme mass ratio merger involving a supermassive black hole (SMBH). We confirm that ... |
gr-qc/0605067 | Tatyana P. Shestakova | T. P. Shestakova | Cosmological solutions for the Universe filled with matter in various
states and gauge invariance | 8 pages, talk presented at the International Conference on
Gravitation, Cosmology and Astrophysics dedicated to 90th anniversary of K.
P. Staniukovich, Moscow, March 2006 | Grav.Cosmol. 12 (2006) 223-226 | null | null | gr-qc | null | We explore at phenomenological level a model of the Universe filled with
various kinds of matter characterized by different equations of state. We show
that introducing of each kind of matter is equivalent to a certain choice of a
gauge condition, the gauge condition describing a medium with a given equation
of state... | [
{
"created": "Thu, 11 May 2006 11:57:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shestakova",
"T. P.",
""
]
] | We explore at phenomenological level a model of the Universe filled with various kinds of matter characterized by different equations of state. We show that introducing of each kind of matter is equivalent to a certain choice of a gauge condition, the gauge condition describing a medium with a given equation of state. ... |
1811.04327 | Javier Olmedo | Javier Olmedo and Emanuele Alesci | Power spectrum of primordial perturbations for an emergent universe in
quantum reduced loop gravity | 28 pages, 8 figures | null | 10.1088/1475-7516/2019/04/030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics and predictions of a new emergent-universe model
recently derived within Quantum Reduced Loop Gravity and based on the so-called
statistical regularization scheme. These effective geometries show a dynamical
transition from a stationary spacetime, with nearly constant scale factor at
very early ... | [
{
"created": "Sun, 11 Nov 2018 00:20:20 GMT",
"version": "v1"
}
] | 2019-04-24 | [
[
"Olmedo",
"Javier",
""
],
[
"Alesci",
"Emanuele",
""
]
] | We study the dynamics and predictions of a new emergent-universe model recently derived within Quantum Reduced Loop Gravity and based on the so-called statistical regularization scheme. These effective geometries show a dynamical transition from a stationary spacetime, with nearly constant scale factor at very early ti... |
gr-qc/0408088 | Daniel Hofmann | D. Hofmann and W. Kummer | Effective Action and Hawking Flux from Covariant Perturbation Theory | 26 pages | Eur.Phys.J. C40 (2005) 275-286 | 10.1140/epjc/s2005-02129-9 | TUW-04-20 | gr-qc | null | The computation of the radiation flux related to the Hawking temperature of a
Schwarzschild Black Hole or another geometric background is still well-known to
be fraught with a number of delicate problems. In spherical reduction, as shown
by one of the present authors (W. K.) with D.V. Vassilevich, the correct black
b... | [
{
"created": "Thu, 26 Aug 2004 21:46:06 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Hofmann",
"D.",
""
],
[
"Kummer",
"W.",
""
]
] | The computation of the radiation flux related to the Hawking temperature of a Schwarzschild Black Hole or another geometric background is still well-known to be fraught with a number of delicate problems. In spherical reduction, as shown by one of the present authors (W. K.) with D.V. Vassilevich, the correct black bod... |
2002.08048 | Huiquan Li | Huiquan Li and Jiancheng Wang | Towards the merger of Hawking radiating black holes | 17 pages, no figure | null | 10.1142/S0218271821500607 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the merger process of binary black holes with Hawking radiation
taken into account. Besides the redshifted radiation to infinity, binary black
holes can exchange radiation between themselves, which is first redshifted and
then blueshifted when it propagates from one hole to the other. The exchange
rate sho... | [
{
"created": "Wed, 19 Feb 2020 08:23:44 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 2020 15:46:57 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jun 2021 13:59:37 GMT",
"version": "v3"
}
] | 2021-07-21 | [
[
"Li",
"Huiquan",
""
],
[
"Wang",
"Jiancheng",
""
]
] | We discuss the merger process of binary black holes with Hawking radiation taken into account. Besides the redshifted radiation to infinity, binary black holes can exchange radiation between themselves, which is first redshifted and then blueshifted when it propagates from one hole to the other. The exchange rate shoul... |
2006.15622 | She-Sheng Xue | She-Sheng Xue | Massive particle pair production and oscillation in Friedman Universe:
reheating energy and entropy, and cold dark matter | The final version to appear in the European Physical Journal C. 41
pages and 11 captioned figures. Secs 2-3, holographic and massive pair plasma
state; Sec. 5 cosmological model; Sec. 6-10 reheating | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Suppose that the early Universe starts with a cosmological $\Lambda$-term
originating from quantum spacetime at the Planck scale. Dark energy drives
inflation and reheating by reducing its value for massive particle-antiparticle
pairs production and oscillation, resulting in a holographic and massive pair
plasma stat... | [
{
"created": "Sun, 28 Jun 2020 14:36:58 GMT",
"version": "v1"
},
{
"created": "Mon, 3 May 2021 08:59:43 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Jan 2023 17:54:26 GMT",
"version": "v3"
},
{
"created": "Mon, 17 Apr 2023 09:03:31 GMT",
"version": "v4"
}
] | 2023-04-18 | [
[
"Xue",
"She-Sheng",
""
]
] | Suppose that the early Universe starts with a cosmological $\Lambda$-term originating from quantum spacetime at the Planck scale. Dark energy drives inflation and reheating by reducing its value for massive particle-antiparticle pairs production and oscillation, resulting in a holographic and massive pair plasma state.... |
1906.03790 | Marcony Silva Cunha | C.R. Muniz, H.R. Christiansen, M.S. Cunha, H.S. Vieira | Exact solutions of the Wheeler-DeWitt equation with ordering term in a
dark energy scenario | 16 pages, improved figures, some new relevant conclusions, references
added | Physics of the Dark Universe, v28, 100547 (2020) | 10.1016/j.dark.2020.100547 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quantum evolution of the universe in the presence of two
types of dark energies. First, we consider the phantom class ($\omega<-1$)
which would be responsible for a super-accelerated cosmic expansion, and then
we apply the procedure to an ordinary $\Lambda>0$ vacuum ($\omega=-1$). This is
done by a... | [
{
"created": "Mon, 10 Jun 2019 04:24:08 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Oct 2019 23:10:22 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Mar 2020 17:20:39 GMT",
"version": "v3"
}
] | 2022-04-11 | [
[
"Muniz",
"C. R.",
""
],
[
"Christiansen",
"H. R.",
""
],
[
"Cunha",
"M. S.",
""
],
[
"Vieira",
"H. S.",
""
]
] | We investigate the quantum evolution of the universe in the presence of two types of dark energies. First, we consider the phantom class ($\omega<-1$) which would be responsible for a super-accelerated cosmic expansion, and then we apply the procedure to an ordinary $\Lambda>0$ vacuum ($\omega=-1$). This is done by ana... |
1211.2913 | Guido Pizzella | R. de Sangro, G. Finocchiaro, P.Patteri, M. Piccolo, G. Pizzella | Measuring Propagation Speed of Coulomb Fields | 23 pages, 15 figures | null | null | null | gr-qc physics.acc-ph physics.gen-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of gravity propagation has been subject of discussion for quite a
long time: Newton, Laplace and, in relatively more modern times, Eddington
pointed out that, if gravity propagated with finite velocity, planets motion
around the sun would become unstable due to a torque originating from time lag
of the gr... | [
{
"created": "Tue, 13 Nov 2012 08:35:20 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Nov 2014 09:23:07 GMT",
"version": "v2"
}
] | 2014-11-11 | [
[
"de Sangro",
"R.",
""
],
[
"Finocchiaro",
"G.",
""
],
[
"Patteri",
"P.",
""
],
[
"Piccolo",
"M.",
""
],
[
"Pizzella",
"G.",
""
]
] | The problem of gravity propagation has been subject of discussion for quite a long time: Newton, Laplace and, in relatively more modern times, Eddington pointed out that, if gravity propagated with finite velocity, planets motion around the sun would become unstable due to a torque originating from time lag of the grav... |
2403.17278 | Julio Cesar Fabris | J\'ulio C. Fabris and Richard Kerner | A unimodular Kaluza-Klein theory | Latex file, 19 pages, 2 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Unimodular gravity became an object of increasing interest in the late
$80$-ties and was recently used in primordial Universe modeling with
cosmological constant, in the context of the Brans-Dicke gravity including
scalar field. In the present article we investigate the possibility of imposing
the unimodular conditio... | [
{
"created": "Mon, 25 Mar 2024 23:48:19 GMT",
"version": "v1"
}
] | 2024-03-27 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Kerner",
"Richard",
""
]
] | Unimodular gravity became an object of increasing interest in the late $80$-ties and was recently used in primordial Universe modeling with cosmological constant, in the context of the Brans-Dicke gravity including scalar field. In the present article we investigate the possibility of imposing the unimodular condition ... |
gr-qc/0602099 | Yaneer Bar-Yam | Yaneer Bar-Yam | ZM theory I: Introduction and Lorentz covariance | 15 pages, 2 figures | null | null | NECSI Report 2006-02-01 | gr-qc | null | We consider defining time as a function of a cyclical field, an abstraction
of a clock. The definition of time corresponds to a novel interpretation of the
relationship between space-time coordinates of observers at different locations
in space. As a first test of the utility of this definition, we show that it
leads... | [
{
"created": "Fri, 24 Feb 2006 17:29:32 GMT",
"version": "v1"
}
] | 2009-09-29 | [
[
"Bar-Yam",
"Yaneer",
""
]
] | We consider defining time as a function of a cyclical field, an abstraction of a clock. The definition of time corresponds to a novel interpretation of the relationship between space-time coordinates of observers at different locations in space. As a first test of the utility of this definition, we show that it leads t... |
1905.04814 | Artymowski Michal | Vahid Kamali, Micha{\l} Artymowski and Mohammad Reza Setare | Constant roll warm inflation in high dissipative regime | 17 pages, 2 figures, published version | null | 10.1088/1475-7516/2020/07/002 | JCAP07(2020)002 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Constant-roll warm inflation is introduced in this work. A novel approach to
finding an exact solution for Friedman equations coupled to scalar field
equation of motion is presented for cold inflation and is extended to warm
inflation with the constant dissipative parameter $Q=\frac{\Gamma}{3H}$. The
evolution of the... | [
{
"created": "Mon, 13 May 2019 00:11:13 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jul 2020 07:01:55 GMT",
"version": "v2"
}
] | 2020-07-17 | [
[
"Kamali",
"Vahid",
""
],
[
"Artymowski",
"Michał",
""
],
[
"Setare",
"Mohammad Reza",
""
]
] | Constant-roll warm inflation is introduced in this work. A novel approach to finding an exact solution for Friedman equations coupled to scalar field equation of motion is presented for cold inflation and is extended to warm inflation with the constant dissipative parameter $Q=\frac{\Gamma}{3H}$. The evolution of the p... |
0905.2442 | Alan Coley | A.A. Coley | Cosmological Observations: Averaging on the Null Cone | null | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The universe is not isotropic or spatially homogeneous on local scales. The
averaging of local inhomogeneities in general relativity can lead to
significant dynamical effects on the evolution of the universe and on the
interpretation of cosmological data. In particular, all deductions about
cosmology are based on lig... | [
{
"created": "Thu, 14 May 2009 23:05:35 GMT",
"version": "v1"
}
] | 2009-05-19 | [
[
"Coley",
"A. A.",
""
]
] | The universe is not isotropic or spatially homogeneous on local scales. The averaging of local inhomogeneities in general relativity can lead to significant dynamical effects on the evolution of the universe and on the interpretation of cosmological data. In particular, all deductions about cosmology are based on light... |
1712.02210 | Vilson T. Zanchin | Jos\'e D. V. Arba\~nil, Vilson T. Zanchin | Relativistic polytropic spheres with electric charge: Compact stars,
compactness and mass bounds, and quasiblack hole configurations | 15 pages, 15 figures | Phys. Rev. D 97, 104045 (2018) | 10.1103/PhysRevD.97.104045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the static stellar equilibrium configurations ofuncharged and
charged spheres composed by a relativistic polytropic fluid, and compare with
those of spheres composed by a non-relativistic polytropic fluid, the later
case already being studied in a previous work [J. D. Arba\~nil, P. S. Lemos, V.
T. Zanchin, P... | [
{
"created": "Wed, 6 Dec 2017 14:49:29 GMT",
"version": "v1"
}
] | 2018-05-30 | [
[
"Arbañil",
"José D. V.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | We study the static stellar equilibrium configurations ofuncharged and charged spheres composed by a relativistic polytropic fluid, and compare with those of spheres composed by a non-relativistic polytropic fluid, the later case already being studied in a previous work [J. D. Arba\~nil, P. S. Lemos, V. T. Zanchin, Phy... |
1003.5357 | Robert C. Myers | Robert C. Myers and Brandon Robinson | Black Holes in Quasi-topological Gravity | 33 pages, 4 figures; two references added | JHEP 1008:067,2010 | 10.1007/JHEP08(2010)067 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a new gravitational action which includes cubic curvature
interactions and which provides a useful toy model for the holographic study of
a three parameter family of four- and higher-dimensional CFT's. We also
investigate the black hole solutions of this new gravity theory. Further we
examine the equatio... | [
{
"created": "Sun, 28 Mar 2010 10:39:15 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2010 14:07:25 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Myers",
"Robert C.",
""
],
[
"Robinson",
"Brandon",
""
]
] | We construct a new gravitational action which includes cubic curvature interactions and which provides a useful toy model for the holographic study of a three parameter family of four- and higher-dimensional CFT's. We also investigate the black hole solutions of this new gravity theory. Further we examine the equations... |
2308.00917 | Tayyab Naseer | M. Sharif, Tayyab Naseer | Cosmological Solutions through Gravitational Decoupling in
$f(\mathcal{R},\mathcal{T},\mathcal{R}_{\mathrm{a}\mathrm{b}}\mathcal{T}^{\mathrm{a}\mathrm{b}})$
Gravity | 30 pages, 10 figures | Gen. Relativ. Gravit. 55(2023)87 | 10.1007/s10714-023-03135-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we adopt minimal gravitational decoupling scheme to extend a
non-static spherically symmetric isotropic composition to anisotropic interior
in
$f(\mathcal{R},\mathcal{T},\mathcal{R}_{\mathrm{a}\mathrm{b}}\mathcal{T}^{\mathrm{a}\mathrm{b}})$
theory. A geometric deformation is applied only on $g_{rr}$ me... | [
{
"created": "Wed, 2 Aug 2023 03:14:52 GMT",
"version": "v1"
}
] | 2023-08-03 | [
[
"Sharif",
"M.",
""
],
[
"Naseer",
"Tayyab",
""
]
] | In this paper, we adopt minimal gravitational decoupling scheme to extend a non-static spherically symmetric isotropic composition to anisotropic interior in $f(\mathcal{R},\mathcal{T},\mathcal{R}_{\mathrm{a}\mathrm{b}}\mathcal{T}^{\mathrm{a}\mathrm{b}})$ theory. A geometric deformation is applied only on $g_{rr}$ metr... |
gr-qc/0611131 | Shailesh Kulkarni | Rabin Banerjee, Subir Ghosh and Shailesh Kulkarni | Remarks on the Generalized Chaplygin Gas | References addeded | Phys.Rev.D75:025008,2007 | 10.1103/PhysRevD.75.025008 | null | gr-qc hep-th | null | We have developed an action formulation for the Generalized Chaplygin Gas
(GCG). The most general form for the nonrelativistic GCG action is derived
consistent with the equation of state. We have also discussed a relativistic
formulation for GCG by providing a detailed analysis of the Poincare algebra.
| [
{
"created": "Fri, 24 Nov 2006 10:55:37 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2006 05:35:54 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Banerjee",
"Rabin",
""
],
[
"Ghosh",
"Subir",
""
],
[
"Kulkarni",
"Shailesh",
""
]
] | We have developed an action formulation for the Generalized Chaplygin Gas (GCG). The most general form for the nonrelativistic GCG action is derived consistent with the equation of state. We have also discussed a relativistic formulation for GCG by providing a detailed analysis of the Poincare algebra. |
gr-qc/0208084 | Janusz Garecki | Janusz Garecki (Institute of Physics, U. of Szczecin) | Einsteinian Strengths and Dynamical Degrees of Freedom for Alternative
Gravity Theories | 19 pages, no figures, LaTeX + RevTeX, Talk delivered at the
International Conference: "Ideas of Albert Abraham Michelson in Mathematical
Physics", Stefan Banach International Mathematical Center, August 4 - 11,
2002, Bedlevo, Poland | null | null | null | gr-qc | null | In this paper we present the results of our calculations of the Einsteinian
strengths S_E(d) and numbers dynamical degrees of freedom N_{DF}(d) for
alternative gravity theories in d >= 4 dimensions. In the first part we
consider the numbers S_E(d) and N_{DF}(d) for metric-compatible and quadratic
in curvature (or qua... | [
{
"created": "Tue, 27 Aug 2002 14:47:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Garecki",
"Janusz",
"",
"Institute of Physics, U. of Szczecin"
]
] | In this paper we present the results of our calculations of the Einsteinian strengths S_E(d) and numbers dynamical degrees of freedom N_{DF}(d) for alternative gravity theories in d >= 4 dimensions. In the first part we consider the numbers S_E(d) and N_{DF}(d) for metric-compatible and quadratic in curvature (or quadr... |
1810.07356 | Ernesto Contreras | Ernesto Contreras, \'Angel Rinc\'on and J. M. Ram\'irez-Velasquez | Relativistic dust accretion onto a scale--dependent polytropic black
hole | 5 pages, 2 figures | Eur. Phys. J. C (2019) 79:53 | 10.1140/epjc/s10052-019-6601-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study steady and spherical relativistic dust accretion onto a
static and spherically symmetric scale--dependent black hole. In particular we
consider a polytropic scale--dependent black hole as a central object and
obtain that the radial velocity profile and the energy density are affected
when scale-... | [
{
"created": "Wed, 17 Oct 2018 02:23:37 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2018 00:36:55 GMT",
"version": "v2"
}
] | 2019-04-01 | [
[
"Contreras",
"Ernesto",
""
],
[
"Rincón",
"Ángel",
""
],
[
"Ramírez-Velasquez",
"J. M.",
""
]
] | In this work we study steady and spherical relativistic dust accretion onto a static and spherically symmetric scale--dependent black hole. In particular we consider a polytropic scale--dependent black hole as a central object and obtain that the radial velocity profile and the energy density are affected when scale--d... |
1710.04181 | Jos\'e Andr\'e Louren\c{c}o | Jos\'e A. Louren\c{c}o, Jos\'e A. Helay\"el Neto, Wesley Spalenza | Topological Gravity on $(D,N)-$Shift Superspace Formulation | null | Adv. High Energy Phys. 2018 (2018) 2786081 | 10.1155/2018/2786081 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this contribution, we re-assess the subject of topological gravity by
following the Shift Supersymmetry formalism. The gauge-fixing of the theory
goes under the Batallin-Vilkovisky (BV) prescription based on a diagram that
contains both ghost and anti-ghost superfields, associated to the
super-vielbein and the sup... | [
{
"created": "Wed, 11 Oct 2017 17:23:20 GMT",
"version": "v1"
},
{
"created": "Tue, 8 May 2018 22:47:22 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Jun 2018 18:20:10 GMT",
"version": "v3"
}
] | 2018-08-09 | [
[
"Lourenço",
"José A.",
""
],
[
"Neto",
"José A. Helayël",
""
],
[
"Spalenza",
"Wesley",
""
]
] | In this contribution, we re-assess the subject of topological gravity by following the Shift Supersymmetry formalism. The gauge-fixing of the theory goes under the Batallin-Vilkovisky (BV) prescription based on a diagram that contains both ghost and anti-ghost superfields, associated to the super-vielbein and the super... |
gr-qc/9509007 | null | Giampiero Esposito | Hamiltonian Structure of a Friedmann-Robertson-Walker Universe with
Torsion | 16 pages, plain-tex, published in Nuovo Cimento B, Volume 104, pages
199-212, year 1989 | NuovoCim.B104:199-212,1989; Erratum-ibid.B106:1315,1991 | 10.1007/BF02906317 | DAMTP R 89/9 | gr-qc | null | We study a $R^{2}$ model of gravity with torsion in a closed
Friedmann-Robertson-Walker universe. The model is cast in Hamiltonian form
subtracting from the original Lagrangian the total time derivative of
$f_{K}f_{R}$, where $f_{K}$ is proportional to the trace of the extrinsic
curvature tensor, and $f_{R}$ is obtai... | [
{
"created": "Wed, 6 Sep 1995 06:04:21 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Esposito",
"Giampiero",
""
]
] | We study a $R^{2}$ model of gravity with torsion in a closed Friedmann-Robertson-Walker universe. The model is cast in Hamiltonian form subtracting from the original Lagrangian the total time derivative of $f_{K}f_{R}$, where $f_{K}$ is proportional to the trace of the extrinsic curvature tensor, and $f_{R}$ is obtaine... |
2403.00916 | Maarten Grothus | Maarten Grothus, V. Vilasini | Characterizing Signalling: Connections between Causal Inference and
Space-time Geometry | 24 + 24 pages, 10 figures. This work includes significantly improved
versions of initial results presented in MG's master's thesis
arXiv:2211.03593. Comments welcome! | null | null | null | gr-qc math-ph math.MP math.ST quant-ph stat.TH | http://creativecommons.org/licenses/by/4.0/ | Causality is pivotal to our understanding of the world, presenting itself in
different forms: information-theoretic and relativistic, the former linked to
the flow of information, the latter to the structure of space-time. Leveraging
a framework introduced in PRA, 106, 032204 (2022), which formally connects
these two... | [
{
"created": "Fri, 1 Mar 2024 19:00:45 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Grothus",
"Maarten",
""
],
[
"Vilasini",
"V.",
""
]
] | Causality is pivotal to our understanding of the world, presenting itself in different forms: information-theoretic and relativistic, the former linked to the flow of information, the latter to the structure of space-time. Leveraging a framework introduced in PRA, 106, 032204 (2022), which formally connects these two n... |
gr-qc/0105117 | Matthew F. Parry | Matthew Parry and Richard Easther | Inhomogeneity and Nonlinear Preheating | Talk given at Marcel Grossmann Meeting IX. 3 pages, 1 figure | null | 10.1142/9789812777386_0451 | null | gr-qc astro-ph hep-ph | null | We investigated the possibility that nonlinear gravitational effects
influence the preheating era after inflation, using numerical solutions of the
inhomogeneous Einstein field equations. We compared our results to perturbative
calculations and to solutions of the nonlinear field equations in a rigid
(unperturbed) sp... | [
{
"created": "Wed, 30 May 2001 18:57:53 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Parry",
"Matthew",
""
],
[
"Easther",
"Richard",
""
]
] | We investigated the possibility that nonlinear gravitational effects influence the preheating era after inflation, using numerical solutions of the inhomogeneous Einstein field equations. We compared our results to perturbative calculations and to solutions of the nonlinear field equations in a rigid (unperturbed) spac... |
1910.13094 | Tsuyoshi Houri | Tsuyoshi Houri, Norihiro Tanahashi, Yukinori Yasui | Hidden symmetry and the separability of the Maxwell equation on the
Wahlquist spacetime | 13 pages, 2 figures, v2: typos corrected | null | 10.1088/1361-6382/ab6e8a | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine hidden symmetry and its relation to the separability of the
Maxwell equation on the Wahlquist spacetime. After seeing that the Wahlquist
spacetime is a type-D spacetime whose repeated principal null directions are
shear-free and geodesic, we show that the spacetime admits three gauged
conformal Killing-Yan... | [
{
"created": "Tue, 29 Oct 2019 05:46:20 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Nov 2019 09:07:58 GMT",
"version": "v2"
}
] | 2020-04-08 | [
[
"Houri",
"Tsuyoshi",
""
],
[
"Tanahashi",
"Norihiro",
""
],
[
"Yasui",
"Yukinori",
""
]
] | We examine hidden symmetry and its relation to the separability of the Maxwell equation on the Wahlquist spacetime. After seeing that the Wahlquist spacetime is a type-D spacetime whose repeated principal null directions are shear-free and geodesic, we show that the spacetime admits three gauged conformal Killing-Yano ... |
gr-qc/9312030 | Jim McCarthy | T. Damour, S. Deser and J. McCarthy | Nonsymmetric Gravity has Unacceptable Global Asymptotics | 10 pages, ADP-93-221/M20 | null | null | null | gr-qc | null | We analyze the radiative aspects of nonsymmetric gravity theory to show that,
in contrast to General Relativity, its nonstationary solutions cannot
simultaneously exhibit acceptable asymptotic behavior at both future and past
null infinity: good behavior at future null infinity is only possible through
the use of adv... | [
{
"created": "Mon, 20 Dec 1993 04:42:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Damour",
"T.",
""
],
[
"Deser",
"S.",
""
],
[
"McCarthy",
"J.",
""
]
] | We analyze the radiative aspects of nonsymmetric gravity theory to show that, in contrast to General Relativity, its nonstationary solutions cannot simultaneously exhibit acceptable asymptotic behavior at both future and past null infinity: good behavior at future null infinity is only possible through the use of advan... |
1708.04761 | Dao-Jun Liu | Yang Huang, Dao-Jun Liu, Xiang-hua Zhai and Xin-zhou Li | Massive charged Dirac fields around Reissner-Nordstr\"om black holes:
quasibound states and long-lived modes | 9 pages, 5 figures, accepted for publication in PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The behavior of a massive charged test Dirac field in the background of a
Reissner-Nordstr\"om black hole is investigated. Especially, we obtain the
frequencies of quasibound states by solving the Dirac equation numerically both
in time and frequency domain. Our results suggest that although the absence of
superradia... | [
{
"created": "Wed, 16 Aug 2017 03:38:57 GMT",
"version": "v1"
}
] | 2017-08-17 | [
[
"Huang",
"Yang",
""
],
[
"Liu",
"Dao-Jun",
""
],
[
"Zhai",
"Xiang-hua",
""
],
[
"Li",
"Xin-zhou",
""
]
] | The behavior of a massive charged test Dirac field in the background of a Reissner-Nordstr\"om black hole is investigated. Especially, we obtain the frequencies of quasibound states by solving the Dirac equation numerically both in time and frequency domain. Our results suggest that although the absence of superradianc... |
1403.1984 | Genly Le\'on | Genly Leon | Phase Space of Anisotropic $R^n$ Cosmologies | Prepared for the First Caribbean Symposium on Nuclear and
Astroparticle Physics - STARS2011 | Int. J. Mod. Phys. E, 20, 19 (2011) | 10.1142/S0218301311040037 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct general anisotropic cosmological scenarios governed by an
$f(R)=R^n$ gravitational sector. Focusing then on some specific geometries, and
modelling the matter content as a perfect fluid, we perform a phase-space
analysis. We analyze the possibility of accelerating expansion at late times,
and additionall... | [
{
"created": "Sat, 8 Mar 2014 16:28:28 GMT",
"version": "v1"
}
] | 2014-03-11 | [
[
"Leon",
"Genly",
""
]
] | We construct general anisotropic cosmological scenarios governed by an $f(R)=R^n$ gravitational sector. Focusing then on some specific geometries, and modelling the matter content as a perfect fluid, we perform a phase-space analysis. We analyze the possibility of accelerating expansion at late times, and additionally,... |
1702.05716 | Sung-Jin Oh | Jonathan Luk, Sung-Jin Oh | Strong cosmic censorship in spherical symmetry for two-ended
asymptotically flat initial data II. The exterior of the black hole region | 132 pages, 10 figures; minor revisions; version accepted for
publication | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the second and last paper of a two-part series in which we prove the
$C^2$-formulation of the strong cosmic censorship conjecture for the
Einstein-Maxwell-(real)-scalar-field system in spherical symmetry for two-ended
asymptotically flat data. In the first paper (arXiv:1702.05715), we showed that
the maximal ... | [
{
"created": "Sun, 19 Feb 2017 08:20:17 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Feb 2019 03:51:25 GMT",
"version": "v2"
}
] | 2019-02-25 | [
[
"Luk",
"Jonathan",
""
],
[
"Oh",
"Sung-Jin",
""
]
] | This is the second and last paper of a two-part series in which we prove the $C^2$-formulation of the strong cosmic censorship conjecture for the Einstein-Maxwell-(real)-scalar-field system in spherical symmetry for two-ended asymptotically flat data. In the first paper (arXiv:1702.05715), we showed that the maximal gl... |
0908.1693 | Mohammad Sami | I. Thongkool, M. Sami, S. Rai Choudhury | How delicate are the $f(R)$ gravity models with disappearing
cosmological constant? | 5 pages and no figures, minor clarification added, final version to
appear in PRD | Phys.Rev.D80:127501,2009 | 10.1103/PhysRevD.80.127501 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider stability of spherically symmetric solutions in $f(R)$ gravity
model proposed by Starobinsky. We find that the model suffers from a severe
fine tuning problem when applied to compact objects like neutron stars. The
problem can be remedied by introducing a cut off on the mass of the scalar
degree of freedo... | [
{
"created": "Wed, 12 Aug 2009 12:45:47 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2009 04:50:20 GMT",
"version": "v2"
}
] | 2010-03-25 | [
[
"Thongkool",
"I.",
""
],
[
"Sami",
"M.",
""
],
[
"Choudhury",
"S. Rai",
""
]
] | We consider stability of spherically symmetric solutions in $f(R)$ gravity model proposed by Starobinsky. We find that the model suffers from a severe fine tuning problem when applied to compact objects like neutron stars. The problem can be remedied by introducing a cut off on the mass of the scalar degree of freedom ... |
2402.06114 | Lehel Csillag | Lehel Csillag, Tiberiu Harko | Semi-Symmetric Metric Gravity: from the Friedmann-Schouten geometry with
torsion to dynamical dark energy models | 17 pages, 10 figures, major revision; new Section and references
added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we introduce a geometric generalization of standard
general relativity, based on a geometry initially introduced by Friedmann and
Schouten in 1924, through the notion of a semi-symmetric connection. The
semi-symmetric connection is a particular connection that extends the
Levi-Civita one, by allo... | [
{
"created": "Fri, 9 Feb 2024 00:37:28 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Feb 2024 20:41:04 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Apr 2024 13:44:22 GMT",
"version": "v3"
}
] | 2024-04-05 | [
[
"Csillag",
"Lehel",
""
],
[
"Harko",
"Tiberiu",
""
]
] | In the present paper we introduce a geometric generalization of standard general relativity, based on a geometry initially introduced by Friedmann and Schouten in 1924, through the notion of a semi-symmetric connection. The semi-symmetric connection is a particular connection that extends the Levi-Civita one, by allowi... |
1101.2634 | Lorenzo Iorio | Lorenzo Iorio | Constraints on the location of a putative distant massive body in the
Solar System from recent planetary data | LaTex2e, 21 pages. 1 figure, 1 table. Uncited references deleted.
Expired link removed and replaced with published references. At press in
Celestial Mechanics and Dynamical Astronomy | Celest.Mech.Dyn.Astron.112:117-130,2012 | 10.1007/s10569-011-9386-7 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically work out the long-term variations caused on the motion of a
planet orbiting a star by a very distant, pointlike massive object X. Apart
from the semi-major axis a, all the other Keplerian osculating orbital elements
experience long-term variations which are complicated functions of the orbital
configu... | [
{
"created": "Thu, 13 Jan 2011 19:07:43 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jan 2011 15:46:13 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Jan 2011 19:30:13 GMT",
"version": "v3"
},
{
"created": "Fri, 19 Aug 2011 18:47:19 GMT",
"version": "v4"
},
{
"c... | 2015-03-17 | [
[
"Iorio",
"Lorenzo",
""
]
] | We analytically work out the long-term variations caused on the motion of a planet orbiting a star by a very distant, pointlike massive object X. Apart from the semi-major axis a, all the other Keplerian osculating orbital elements experience long-term variations which are complicated functions of the orbital configura... |
2112.05651 | Philip Lynch | Philip Lynch, Maarten van de Meent and Niels Warburton | Eccentric self-forced inspirals into a rotating black hole | 46 pages, 12 figures | Class. Quantum Grav. 39:145004 (2022) | 10.1088/1361-6382/ac7507 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We develop the first model for extreme mass-ratio inspirals (EMRIs) into a
rotating massive black hole driven by the gravitational self-force. Our model
is based on an action angle formulation of the method of osculating geodesics
for eccentric, equatorial (i.e., spin-aligned) motion in Kerr spacetime. The
forcing te... | [
{
"created": "Fri, 10 Dec 2021 16:28:02 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Aug 2022 16:09:03 GMT",
"version": "v2"
}
] | 2022-08-04 | [
[
"Lynch",
"Philip",
""
],
[
"van de Meent",
"Maarten",
""
],
[
"Warburton",
"Niels",
""
]
] | We develop the first model for extreme mass-ratio inspirals (EMRIs) into a rotating massive black hole driven by the gravitational self-force. Our model is based on an action angle formulation of the method of osculating geodesics for eccentric, equatorial (i.e., spin-aligned) motion in Kerr spacetime. The forcing term... |
0705.2987 | Helge Mueller-Ebhardt | Henning Rehbein, Helge Mueller-Ebhardt, Kentaro Somiya, Chao Li, Roman
Schnabel, Karsten Danzmann, Yanbei Chen | Local readout enhancement for detuned signal-recycling interferometers | null | Phys.Rev.D76:062002,2007 | 10.1103/PhysRevD.76.062002 | null | gr-qc | null | Motivated by the optical-bar scheme of Braginsky, Gorodetsky and Khalili, we
propose to add to a high power detuned signal-recycling interferometer a local
readout scheme which measures the motion of the arm-cavity front mirror. At low
frequencies this mirror moves together with the arm-cavity end mirror, under
the i... | [
{
"created": "Mon, 21 May 2007 14:33:59 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jun 2007 12:56:49 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Aug 2007 15:32:48 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Rehbein",
"Henning",
""
],
[
"Mueller-Ebhardt",
"Helge",
""
],
[
"Somiya",
"Kentaro",
""
],
[
"Li",
"Chao",
""
],
[
"Schnabel",
"Roman",
""
],
[
"Danzmann",
"Karsten",
""
],
[
"Chen",
"Yanbei",
""
]
] | Motivated by the optical-bar scheme of Braginsky, Gorodetsky and Khalili, we propose to add to a high power detuned signal-recycling interferometer a local readout scheme which measures the motion of the arm-cavity front mirror. At low frequencies this mirror moves together with the arm-cavity end mirror, under the inf... |
gr-qc/0310116 | Scott Noble | Scott C. Noble (University of Illinois at Urbana-Champaign) | A Numerical Study of Relativistic Fluid Collapse | 228 pages, 66 Postscript figures, Ph.D. Thesis, the University of
Texa s at Austin, uses utdiss2.sty v5 | null | null | null | gr-qc astro-ph | null | We investigate the dynamics of self-gravitating, spherically-symmetric
distributions of fluid through numerical means. In particular, systems
involving neutron star models driven far from equilibrium in the strong-field
regime of general relativity are studied. Hydrostatic solutions of Einstein's
equations using a st... | [
{
"created": "Tue, 28 Oct 2003 00:53:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Noble",
"Scott C.",
"",
"University of Illinois at Urbana-Champaign"
]
] | We investigate the dynamics of self-gravitating, spherically-symmetric distributions of fluid through numerical means. In particular, systems involving neutron star models driven far from equilibrium in the strong-field regime of general relativity are studied. Hydrostatic solutions of Einstein's equations using a stif... |
0804.0357 | Patricio S. Letelier | Valeria M. Rosa and Patricio S. Letelier | A Comment on Bonnor-Steadman Closed Timelike Curves | 2 pages, RevTex, minor corrections | Gen.Rel.Grav.41:571-573,2009 | 10.1007/s10714-008-0687-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence and stability closed timelike curves in a Bonnor-Ward spacetime
without torsion line singularities is shown by exhibiting particular examples.
| [
{
"created": "Wed, 2 Apr 2008 14:13:58 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Apr 2008 13:35:51 GMT",
"version": "v2"
}
] | 2009-03-12 | [
[
"Rosa",
"Valeria M.",
""
],
[
"Letelier",
"Patricio S.",
""
]
] | The existence and stability closed timelike curves in a Bonnor-Ward spacetime without torsion line singularities is shown by exhibiting particular examples. |
gr-qc/9906107 | Ruth A. W. Gregory | Caroline Santos and Ruth Gregory | Vortices and black holes in dilatonic gravity | 16 pages revtex, published version | Phys. Rev. D 61, 024006 (1999) | 10.1103/PhysRevD.61.024006 | DTP/99/49 | gr-qc hep-ph hep-th | null | We study analytically black holes pierced by a thin vortex in dilatonic
gravity for an arbitrary coupling of the vortex to the dilaton in an arbitrary
frame. We show that the horizon of the charged black hole supports the
long-range fields of the Nielsen-Olesen vortex that can be considered as black
hole hair for bot... | [
{
"created": "Fri, 25 Jun 1999 19:12:56 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Apr 2000 14:08:33 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Santos",
"Caroline",
""
],
[
"Gregory",
"Ruth",
""
]
] | We study analytically black holes pierced by a thin vortex in dilatonic gravity for an arbitrary coupling of the vortex to the dilaton in an arbitrary frame. We show that the horizon of the charged black hole supports the long-range fields of the Nielsen-Olesen vortex that can be considered as black hole hair for both ... |
0905.0661 | Aharon Davidson | Aharon Davidson and Shimon Rubin | Zero Cosmological Constant from Normalized General Relativity | 5 PRD pages; | Class.Quant.Grav.26:235019,2009 | 10.1088/0264-9381/26/23/235019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Normalizing the Einstein-Hilbert action by the volume functional makes the
theory invariant under constant shifts in the Lagrangian. The associated field
equations then resemble unimodular gravity whose otherwise arbitrary
cosmological constant is now determined as a Machian universal average. We
prove that an empty ... | [
{
"created": "Tue, 5 May 2009 18:08:30 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jul 2009 12:45:18 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Oct 2009 08:42:56 GMT",
"version": "v3"
}
] | 2017-04-06 | [
[
"Davidson",
"Aharon",
""
],
[
"Rubin",
"Shimon",
""
]
] | Normalizing the Einstein-Hilbert action by the volume functional makes the theory invariant under constant shifts in the Lagrangian. The associated field equations then resemble unimodular gravity whose otherwise arbitrary cosmological constant is now determined as a Machian universal average. We prove that an empty sp... |
0911.1890 | Xin Li | X. Li and Z. Chang | Kinematics in Randers-Finsler geometry and secular increase of the
astronomical unit | 10 pages, 2 tables | null | 10.1088/1674-1137/35/10/005 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | Kinematics in Finsler space is investigated. It is showed that the result
based on the kinematics with a special Finsler structure is in good agreement
with the reported value of secular trend in the astronomical unit, $d{\rm
AU}/dt=15\pm4[{\rm m/century}]$. The space deformation parameter $\lambda$ in
this special s... | [
{
"created": "Tue, 10 Nov 2009 11:52:38 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Li",
"X.",
""
],
[
"Chang",
"Z.",
""
]
] | Kinematics in Finsler space is investigated. It is showed that the result based on the kinematics with a special Finsler structure is in good agreement with the reported value of secular trend in the astronomical unit, $d{\rm AU}/dt=15\pm4[{\rm m/century}]$. The space deformation parameter $\lambda$ in this special str... |
gr-qc/9701014 | Ruth A. W. Gregory | Ruth Gregory and Caroline Santos | Cosmic strings in dilaton gravity | 24 pages plain TEX, 4 figures -- references amended, some additional
comments added, version to appear in journal | Phys.Rev.D56:1194-1203,1997 | 10.1103/PhysRevD.56.1194 | DTP/97/1 | gr-qc astro-ph hep-th | null | We examine the metric of an isolated self-gravitating abelian-Higgs vortex in
dilatonic gravity for arbitrary coupling of the vortex fields to the dilaton.
We look for solutions in both massless and massive dilaton gravity. We compare
our results to existing metrics for strings in Einstein and Jordan-Brans-Dicke
theo... | [
{
"created": "Thu, 9 Jan 1997 17:39:20 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jun 1997 13:17:12 GMT",
"version": "v2"
}
] | 2011-09-09 | [
[
"Gregory",
"Ruth",
""
],
[
"Santos",
"Caroline",
""
]
] | We examine the metric of an isolated self-gravitating abelian-Higgs vortex in dilatonic gravity for arbitrary coupling of the vortex fields to the dilaton. We look for solutions in both massless and massive dilaton gravity. We compare our results to existing metrics for strings in Einstein and Jordan-Brans-Dicke theory... |
gr-qc/9711088 | Kostas Kokkotas | Nils Andersson (Washington University) and Kostas D. Kokkotas
(Aristotle University of Thessaloniki) | Towards gravitational-wave asteroseismology | 11 pages, 8 figures, mn.sty | Mon.Not.Roy.Astron.Soc.299:1059-1068,1998 | 10.1046/j.1365-8711.1998.01840.x | AUTH-GRAV-97-03 | gr-qc astro-ph | null | We present new results for pulsating neutron stars. We have calculated the
eigenfrequencies of the modes that one would expect to be the most important
gravitational-wave sources: the fundamental fluid f-mode, the first pressure
p-mode and the first gravitational-wave w-mode, for twelve realistic equations
of state. ... | [
{
"created": "Fri, 28 Nov 1997 15:45:02 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Andersson",
"Nils",
"",
"Washington University"
],
[
"Kokkotas",
"Kostas D.",
"",
"Aristotle University of Thessaloniki"
]
] | We present new results for pulsating neutron stars. We have calculated the eigenfrequencies of the modes that one would expect to be the most important gravitational-wave sources: the fundamental fluid f-mode, the first pressure p-mode and the first gravitational-wave w-mode, for twelve realistic equations of state. Fr... |
2404.00867 | Paul Steinhardt | Anna Ijjas, Paul J. Steinhardt, David Garfinkle and William G. Cook | Smoothing and flattening the universe through slow contraction versus
inflation | 18 pages, 6 figures, 1 table | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a systematic study, we use an equivalent pair of improved numerical
relativity codes based on a tetrad-formulation of the classical Einstein-scalar
field equations to examine whether slow contraction or inflation (or both) can
resolve the homogeneity, isotropy and flatness problems. Our finding, based on
a set of ... | [
{
"created": "Mon, 1 Apr 2024 02:26:28 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 11:14:36 GMT",
"version": "v2"
}
] | 2024-04-03 | [
[
"Ijjas",
"Anna",
""
],
[
"Steinhardt",
"Paul J.",
""
],
[
"Garfinkle",
"David",
""
],
[
"Cook",
"William G.",
""
]
] | In a systematic study, we use an equivalent pair of improved numerical relativity codes based on a tetrad-formulation of the classical Einstein-scalar field equations to examine whether slow contraction or inflation (or both) can resolve the homogeneity, isotropy and flatness problems. Our finding, based on a set of ga... |
1904.00260 | Daniele Vernieri | In\^es Terrucha, Daniele Vernieri, Jos\'e P. S. Lemos | Covariant action for bouncing cosmologies in modified Gauss-Bonnet
gravity | 8 pages | Annals of Physics 404 (2019) 39 | 10.1016/j.aop.2019.02.010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cyclic universes with bouncing solutions are candidates for solving the big
bang initial singularity problem. Here we seek bouncing solutions in a modified
Gauss-Bonnet gravity theory, of the type $R+f(G)$, where $R$ is the Ricci
scalar, $G$ is the Gauss-Bonnet term, and $f$ some function of it. In finding
such a bou... | [
{
"created": "Sat, 30 Mar 2019 17:37:06 GMT",
"version": "v1"
}
] | 2019-04-02 | [
[
"Terrucha",
"Inês",
""
],
[
"Vernieri",
"Daniele",
""
],
[
"Lemos",
"José P. S.",
""
]
] | Cyclic universes with bouncing solutions are candidates for solving the big bang initial singularity problem. Here we seek bouncing solutions in a modified Gauss-Bonnet gravity theory, of the type $R+f(G)$, where $R$ is the Ricci scalar, $G$ is the Gauss-Bonnet term, and $f$ some function of it. In finding such a bounc... |
2008.08704 | Tao Zhu | Tao Zhu and Anzhong Wang | Observational tests of the self-dual spacetime in loop quantum gravity | 9 pages, 1 table; version to appear in Phys. Rev. D | Phys. Rev. D 102, 124042 (2020) | 10.1103/PhysRevD.102.124042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The self-dual spacetime was derived from the mini-superspace approach, based
on the polymerization quantization procedure in loop quantum gravity (LQG). Its
deviation from the Schwarzschild spacetime is characterized by the polymeric
function $P$, purely due to the geometric quantum effects from LQG. In this
paper, w... | [
{
"created": "Wed, 19 Aug 2020 23:37:15 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Dec 2020 02:38:29 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
]
] | The self-dual spacetime was derived from the mini-superspace approach, based on the polymerization quantization procedure in loop quantum gravity (LQG). Its deviation from the Schwarzschild spacetime is characterized by the polymeric function $P$, purely due to the geometric quantum effects from LQG. In this paper, we ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.