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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1909.11382 | Sergey Bondarenko | S.Bondarenko | CPTM discrete symmetry, quantum wormholes and cosmological constant
problem | 14 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the consequences of the charge, parity, time and mass (CPTM)
extended reversal symmetry for the problems of the vacuum energy density and
value of the cosmological constant. The results obtained are based on the
framework with the separation of extended space-time of the interest on the
different regions c... | [
{
"created": "Wed, 25 Sep 2019 10:20:22 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Oct 2019 07:51:41 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Oct 2019 12:59:25 GMT",
"version": "v3"
},
{
"created": "Wed, 30 Oct 2019 08:15:20 GMT",
"version": "v4"
},
{
"cr... | 2020-08-06 | [
[
"Bondarenko",
"S.",
""
]
] | We discuss the consequences of the charge, parity, time and mass (CPTM) extended reversal symmetry for the problems of the vacuum energy density and value of the cosmological constant. The results obtained are based on the framework with the separation of extended space-time of the interest on the different regions con... |
2303.01696 | Reggie Pantig | Ali \"Ovg\"un, Reggie C. Pantig, \'Angel Rinc\'on | 4D scale-dependent Schwarzschild-AdS/dS black holes: study of shadow and
weak deflection angle and greybody bounding | 16 pages, 7 figures | Eur. Phys. J. Plus (2023) 138(3):192 | 10.1140/epjp/s13360-023-03793-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the shadow, deflection angle, and the greybody bounding of a
Schwarzschild-AdS/dS black hole in scale-dependent gravity. We used the EHT
data to constrain the parameter $\epsilon$. We have found that within the
$1\sigma$ level of uncertainty, $\epsilon M_0$ ranges at $10^{-11} - 10^{-16}$
orders of mag... | [
{
"created": "Fri, 3 Mar 2023 03:41:11 GMT",
"version": "v1"
}
] | 2023-03-06 | [
[
"Övgün",
"Ali",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Rincón",
"Ángel",
""
]
] | We investigate the shadow, deflection angle, and the greybody bounding of a Schwarzschild-AdS/dS black hole in scale-dependent gravity. We used the EHT data to constrain the parameter $\epsilon$. We have found that within the $1\sigma$ level of uncertainty, $\epsilon M_0$ ranges at $10^{-11} - 10^{-16}$ orders of magni... |
1510.03135 | Jian-Yang Zhu | Long Chen and Jian-Yang Zhu | Loop quantum cosmology: The horizon problem and the probability of
inflation | 8 pages, 2 figure, 2 tables, final published version | Phys. Rev. D 92, 084063 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Anomaly-free perturbations of loop quantum cosmology reveal a deformed
space-time structure, in which the signature changes when the energy density is
$\rho=\rho_c/2$. Furthermore, in loop quantum cosmology, one can obtain an
effective causal structure only for a low density region ($\rho\leq\rho_c/2$),
which gives a... | [
{
"created": "Mon, 12 Oct 2015 04:24:03 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2015 13:54:33 GMT",
"version": "v2"
}
] | 2015-11-19 | [
[
"Chen",
"Long",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | Anomaly-free perturbations of loop quantum cosmology reveal a deformed space-time structure, in which the signature changes when the energy density is $\rho=\rho_c/2$. Furthermore, in loop quantum cosmology, one can obtain an effective causal structure only for a low density region ($\rho\leq\rho_c/2$), which gives a n... |
gr-qc/0503029 | Gordon McCabe | Gordon McCabe | The structure and interpretation of cosmology: Part II - The concept of
creation in inflation and quantum cosmology | null | Studies in History and Philosophy of Modern Physics, Volume 36,
Issue 1, March 2005, pp67-102 | 10.1016/j.shpsb.2004.08.003 | null | gr-qc | null | The purpose of the paper, of which this is part II, is to review, clarify,
and critically analyse modern mathematical cosmology. The emphasis is upon
mathematical objects and structures, rather than numerical computations. Part
II provides a critical analysis of inflationary cosmology and quantum
cosmology, with part... | [
{
"created": "Mon, 7 Mar 2005 21:40:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"McCabe",
"Gordon",
""
]
] | The purpose of the paper, of which this is part II, is to review, clarify, and critically analyse modern mathematical cosmology. The emphasis is upon mathematical objects and structures, rather than numerical computations. Part II provides a critical analysis of inflationary cosmology and quantum cosmology, with partic... |
gr-qc/9608054 | Carmen Chicone | Carmen Chicone, Bahram Mashhoon, David Retzloff | Gravitational Ionization: A Chaotic Net in the Kepler System | REVTEX Style, Submitted | Class.Quant.Grav. 14 (1997) 699-724 | 10.1088/0264-9381/14/3/013 | null | gr-qc | null | The long term nonlinear dynamics of a Keplerian binary system under the
combined influences of gravitational radiation damping and external tidal
perturbations is analyzed. Gravitational radiation reaction leads the binary
system towards eventual collapse, while the external periodic perturbations
could lead to the i... | [
{
"created": "Thu, 22 Aug 1996 18:36:00 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Chicone",
"Carmen",
""
],
[
"Mashhoon",
"Bahram",
""
],
[
"Retzloff",
"David",
""
]
] | The long term nonlinear dynamics of a Keplerian binary system under the combined influences of gravitational radiation damping and external tidal perturbations is analyzed. Gravitational radiation reaction leads the binary system towards eventual collapse, while the external periodic perturbations could lead to the ion... |
0905.3430 | Jiliang Jing | Jieci Wang, Qiyuan Pan and Jiliang Jing | Projective measurements and generation of entangled Dirac particles in
Schwarzschild Spacetime | 11 pages, 1 figure; Accepted by Annals of physics | Annals Phys.325:1190-1197,2010 | 10.1016/j.aop.2010.03.001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the projective measurements made by Bob who locates near the
event horizon of the Schwarzschild black hole will create entangled particles
detected by Alice who stays stationary at the asymptotically flat region. It is
found that the degree of entanglement decreases as the frequency of the
detected p... | [
{
"created": "Thu, 21 May 2009 03:15:09 GMT",
"version": "v1"
},
{
"created": "Fri, 14 May 2010 03:38:54 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Wang",
"Jieci",
""
],
[
"Pan",
"Qiyuan",
""
],
[
"Jing",
"Jiliang",
""
]
] | It is shown that the projective measurements made by Bob who locates near the event horizon of the Schwarzschild black hole will create entangled particles detected by Alice who stays stationary at the asymptotically flat region. It is found that the degree of entanglement decreases as the frequency of the detected par... |
2403.01995 | Rabia Saleem | M. Israr Aslam, Xiao-Xiong Zeng, Rabia Saleem, Xin-Yun Hu | Holographic Einstein Ring of a Charged Rastall AdS Black Hole with Bulk
Electromagnetic Field | 20 pages, 18 figures | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We study the Einstein images of a charged Rastall AdS black hole (BH) within
the fabric of AdS/CFT correspondence. Considering the holographic setup, we
analyze the amplitude of the total response function for various values of
model parameters. With an increase in parameter $\lambda$ and temperature $T$,
the amplitu... | [
{
"created": "Mon, 4 Mar 2024 12:43:48 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Aslam",
"M. Israr",
""
],
[
"Zeng",
"Xiao-Xiong",
""
],
[
"Saleem",
"Rabia",
""
],
[
"Hu",
"Xin-Yun",
""
]
] | We study the Einstein images of a charged Rastall AdS black hole (BH) within the fabric of AdS/CFT correspondence. Considering the holographic setup, we analyze the amplitude of the total response function for various values of model parameters. With an increase in parameter $\lambda$ and temperature $T$, the amplitude... |
1212.0745 | Vasudev Shyam S | Vasudev Shyam | Intrinsic Time Deparameterization of The Canonical Connection Dynamics
of General Relativity | 5 pages, no figures, minor corrections in v2 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the implications of intrinsic time deparameterization on the
phase space of the connection representation of canonical gravity in the form
of the Ashtekar variables. We find that, much like the metric representation of
this formalism, the Hamiltonian constraint now becomes a physical Hamiltonian
genera... | [
{
"created": "Sun, 2 Dec 2012 15:17:28 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2012 17:09:09 GMT",
"version": "v2"
},
{
"created": "Sun, 9 Dec 2012 10:51:53 GMT",
"version": "v3"
},
{
"created": "Mon, 31 Dec 2012 03:05:49 GMT",
"version": "v4"
}
] | 2013-01-01 | [
[
"Shyam",
"Vasudev",
""
]
] | We investigate the implications of intrinsic time deparameterization on the phase space of the connection representation of canonical gravity in the form of the Ashtekar variables. We find that, much like the metric representation of this formalism, the Hamiltonian constraint now becomes a physical Hamiltonian generati... |
1302.5530 | Stoytcho Yazadjiev | Stoytcho S. Yazadjiev | Electrically charged dilaton black holes in external magnetic field | 12 pages, LaTex | null | 10.1103/PhysRevD.87.084068 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we construct a new solution to the
Einstein-Maxwell-dilaton gravity equations describing electrically charged
dilaton black holes immersed in a strong external magnetic field and we study
its properties. The black holes described by the solution are rotating but with
zero total angular momentum a... | [
{
"created": "Fri, 22 Feb 2013 09:41:03 GMT",
"version": "v1"
}
] | 2013-05-08 | [
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In the present paper we construct a new solution to the Einstein-Maxwell-dilaton gravity equations describing electrically charged dilaton black holes immersed in a strong external magnetic field and we study its properties. The black holes described by the solution are rotating but with zero total angular momentum and... |
2301.00572 | Istvan Racz | Istv\'an R\'acz | Spacetime singularities and curvature blow-ups | 25 pages, no figure | Gen Relativ Gravit 55, 3 (2023) | 10.1007/s10714-022-03053-9 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The singularity theorems of Penrose, Hawking, and Geroch predict the
existence of incomplete inextendible causal geodesics in a wide range of
physically adequate spacetimes modeling the gravitational collapse of stars and
the expanding universe. Here, using results on spacetime extensions, it is
shown that if a suita... | [
{
"created": "Mon, 2 Jan 2023 09:20:14 GMT",
"version": "v1"
}
] | 2023-01-03 | [
[
"Rácz",
"István",
""
]
] | The singularity theorems of Penrose, Hawking, and Geroch predict the existence of incomplete inextendible causal geodesics in a wide range of physically adequate spacetimes modeling the gravitational collapse of stars and the expanding universe. Here, using results on spacetime extensions, it is shown that if a suitabl... |
2111.15032 | Shuichi Yokoyama | Shuichi Yokoyama | Gravitational collapse of spherical shells of fluid in the isotropic
homogeneous universe | 1+22 pages, 6 figures, v2: clarification of the scale factor
connecting to inflationary period, v3: further clarification, minor
improvements, figures, references added, v4: reorganization, minor revisions,
published version | null | 10.1016/j.physletb.2022.137418 | YITP-21-142 | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate gravitational collapse of thick shell of fluid in the
isotropic homogeneous universe without radiation described by the Einstein
gravity with cosmological constant. We construct analytic solutions of this
kind interpolating the Friedmann-Lemaitre-Robertson-Walker (FLRW) metric and
the de-Sitter Schwarz... | [
{
"created": "Tue, 30 Nov 2021 00:00:12 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Dec 2021 06:05:33 GMT",
"version": "v2"
},
{
"created": "Fri, 6 May 2022 04:33:52 GMT",
"version": "v3"
},
{
"created": "Fri, 2 Sep 2022 23:53:25 GMT",
"version": "v4"
}
] | 2022-09-07 | [
[
"Yokoyama",
"Shuichi",
""
]
] | We investigate gravitational collapse of thick shell of fluid in the isotropic homogeneous universe without radiation described by the Einstein gravity with cosmological constant. We construct analytic solutions of this kind interpolating the Friedmann-Lemaitre-Robertson-Walker (FLRW) metric and the de-Sitter Schwarzsc... |
2407.14863 | Francisco Fern\'andez-\'Alvarez | Francisco Fern\'andez-\'Alvarez, Ji\v{r}\'i Podolsk\'y, Jos\'e M. M.
Senovilla | Analysis of gravitational radiation generated by type D black holes with
positive cosmological constant | 35 pages, 5 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The criterion for existence of gravitational radiation at conformal infinity
in the presence of a positive cosmological constant is applied to a general
family of exact solutions representing generic (pairs of) black holes of
algebraic type D. Our analysis shows that only accelerating black holes
generate gravitation... | [
{
"created": "Sat, 20 Jul 2024 12:55:27 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Fernández-Álvarez",
"Francisco",
""
],
[
"Podolský",
"Jiří",
""
],
[
"Senovilla",
"José M. M.",
""
]
] | The criterion for existence of gravitational radiation at conformal infinity in the presence of a positive cosmological constant is applied to a general family of exact solutions representing generic (pairs of) black holes of algebraic type D. Our analysis shows that only accelerating black holes generate gravitational... |
1805.12435 | Muhammed Amir | Muhammed Amir, Ayan Banerjee, Sunil D. Maharaj | Shadow of charged wormholes in Einstein-Maxwell-dilaton theory | 8 pages, 4 figures | Annals Phys. 400, 198 (2019) | 10.1016/j.aop.2018.11.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of shadow is quite prominent nowadays because of the ongoing Event
Horizon Telescope\footnote{https://eventhorizontelescope.org/} observations. We
construct the shadow images of charged wormholes in Einstein-Maxwell-dilaton
(EMD) theory. The spacetime metric of the charged wormholes contains three
charges: ... | [
{
"created": "Thu, 31 May 2018 12:16:21 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2018 08:03:47 GMT",
"version": "v2"
}
] | 2018-12-07 | [
[
"Amir",
"Muhammed",
""
],
[
"Banerjee",
"Ayan",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | The study of shadow is quite prominent nowadays because of the ongoing Event Horizon Telescope\footnote{https://eventhorizontelescope.org/} observations. We construct the shadow images of charged wormholes in Einstein-Maxwell-dilaton (EMD) theory. The spacetime metric of the charged wormholes contains three charges: ma... |
2312.00409 | Christian Pfeifer | R. Alves Batista, G. Amelino-Camelia, D. Boncioli, J. M. Carmona, A.
di Matteo, G. Gubitosi, I. Lobo, N. E. Mavromatos, C. Pfeifer, D.
Rubiera-Garcia, E. N. Saridakis, T. Terzi\'c, E. C. Vagenas, P. Vargas Moniz,
H. Abdalla, M. Adamo, A. Addazi, F. K. Anagnostopoulos, V. Antonelli, M.
Asorey, A. Ballesteros, S.... | White Paper and Roadmap for Quantum Gravity Phenomenology in the
Multi-Messenger Era | Submitted to CQG for the Focus Issue on "Quantum Gravity
Phenomenology in the Multi-Messenger Era: Challenges and Perspectives".
Please contact us to express interesst of endorsement of this white paper | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The unification of quantum mechanics and general relativity has long been
elusive. Only recently have empirical predictions of various possible theories
of quantum gravity been put to test. The dawn of multi-messenger high-energy
astrophysics has been tremendously beneficial, as it allows us to study
particles with m... | [
{
"created": "Fri, 1 Dec 2023 08:14:19 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Dec 2023 16:06:25 GMT",
"version": "v2"
}
] | 2023-12-13 | [
[
"Batista",
"R. Alves",
""
],
[
"Amelino-Camelia",
"G.",
""
],
[
"Boncioli",
"D.",
""
],
[
"Carmona",
"J. M.",
""
],
[
"di Matteo",
"A.",
""
],
[
"Gubitosi",
"G.",
""
],
[
"Lobo",
"I.",
""
],
[
"Mavr... | The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions of various possible theories of quantum gravity been put to test. The dawn of multi-messenger high-energy astrophysics has been tremendously beneficial, as it allows us to study particles with muc... |
1712.04132 | Susana Valdez Alvarado | Susana Valdez-Alvarado, Ricardo Becerril and Francisco Astorga | Static dilaton space-time parameters from frequency shifts of photons
emitted by geodesic particles | 8 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mass parameter of dilaton space-times is obtained as a function of the
redshift-blueshift (zred, zblue) of photons emitted by particles orbiting in
circular motion around these objects and their corresponding radii.
Particularly, we work with the generalized Chatterjee and Gibbons- Maeda
space-times. Both of them... | [
{
"created": "Tue, 12 Dec 2017 05:08:47 GMT",
"version": "v1"
}
] | 2017-12-13 | [
[
"Valdez-Alvarado",
"Susana",
""
],
[
"Becerril",
"Ricardo",
""
],
[
"Astorga",
"Francisco",
""
]
] | The mass parameter of dilaton space-times is obtained as a function of the redshift-blueshift (zred, zblue) of photons emitted by particles orbiting in circular motion around these objects and their corresponding radii. Particularly, we work with the generalized Chatterjee and Gibbons- Maeda space-times. Both of them b... |
1908.02159 | Yuan Shi | Yuan Shi | Force, metric, or mass: Disambiguating causes of uniform gravity | 3 figures | null | null | LLNL-JRNL-784861 | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In addition to nonzero forces and nontrivial metrics, here I show that a
nonconstant Higgs expectation value, which endows elementary particles with
their masses, also leads to apparent universal particle accelerations and
photon frequency shifts. When effects of the Higgs is attributed to spacetime
curvatures, a spu... | [
{
"created": "Mon, 5 Aug 2019 00:39:47 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Sep 2021 07:07:24 GMT",
"version": "v2"
}
] | 2021-09-06 | [
[
"Shi",
"Yuan",
""
]
] | In addition to nonzero forces and nontrivial metrics, here I show that a nonconstant Higgs expectation value, which endows elementary particles with their masses, also leads to apparent universal particle accelerations and photon frequency shifts. When effects of the Higgs is attributed to spacetime curvatures, a spuri... |
2101.08538 | Tuan Do | Tuan Q. Do | No-go theorem for inflation in an extended Ricci-inverse gravity model | 14 pages, 3 figures. Updated version with additional discussions on
the Minkowskian limit. All calculations are not modified. Matches the
published version. Comments are welcome | Eur. Phys. J. C 82, 15 (2022) | 10.1140/epjc/s10052-021-09974-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we propose an extension of the Ricci-inverse gravity, which
has been proposed recently as a very novel type of fourth-order gravity, by
introducing a second order term of the so-called anticurvature scalar as a
correction. The main purpose of this paper is that we would like to see whether
the extended... | [
{
"created": "Thu, 21 Jan 2021 10:41:46 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jan 2021 07:57:50 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Jan 2022 06:25:31 GMT",
"version": "v3"
}
] | 2022-01-11 | [
[
"Do",
"Tuan Q.",
""
]
] | In this paper, we propose an extension of the Ricci-inverse gravity, which has been proposed recently as a very novel type of fourth-order gravity, by introducing a second order term of the so-called anticurvature scalar as a correction. The main purpose of this paper is that we would like to see whether the extended R... |
2010.15723 | Shokoufe Faraji | Shokoufe Faraji | Circular geodesics in a New Generalization of q-metric | null | Universe 2022, 8(3), 195; | 10.3390/universe8030195 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper introduces an alternative generalization of the static solution
with quadrupole moment, the $\rm q$-metric, that describes a deformed compact
object in the presence of the external fields characterized by multipole
moments. In addition, we also examine the impact of the external fields up to
quadrupole on ... | [
{
"created": "Thu, 29 Oct 2020 16:12:13 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Oct 2020 03:48:54 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Feb 2021 18:19:20 GMT",
"version": "v3"
},
{
"created": "Mon, 19 Jul 2021 14:04:36 GMT",
"version": "v4"
},
{
"c... | 2022-03-22 | [
[
"Faraji",
"Shokoufe",
""
]
] | This paper introduces an alternative generalization of the static solution with quadrupole moment, the $\rm q$-metric, that describes a deformed compact object in the presence of the external fields characterized by multipole moments. In addition, we also examine the impact of the external fields up to quadrupole on th... |
gr-qc/0610072 | Alejandro Corichi | Alejandro Corichi, Tatjana Vukasinac and Jose A. Zapata | Hamiltonian and physical Hilbert space in polymer quantum mechanics | 19 pages, 2 figures. Comments and references added. Version to be
published in CQG | Class.Quant.Grav.24:1495-1512,2007 | 10.1088/0264-9381/24/6/008 | null | gr-qc hep-th quant-ph | null | In this paper, a version of polymer quantum mechanics, which is inspired by
loop quantum gravity, is considered and shown to be equivalent, in a precise
sense, to the standard, experimentally tested, Schroedinger quantum mechanics.
The kinematical cornerstone of our framework is the so called polymer
representation o... | [
{
"created": "Mon, 16 Oct 2006 19:54:41 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 2007 03:25:53 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Corichi",
"Alejandro",
""
],
[
"Vukasinac",
"Tatjana",
""
],
[
"Zapata",
"Jose A.",
""
]
] | In this paper, a version of polymer quantum mechanics, which is inspired by loop quantum gravity, is considered and shown to be equivalent, in a precise sense, to the standard, experimentally tested, Schroedinger quantum mechanics. The kinematical cornerstone of our framework is the so called polymer representation of ... |
0901.1439 | Jing Wang | Jing Wang, Shu-wang Cui, Cheng-min Zhang | Thermodynamics of Spinor Quintom | 8pages, no figure | Phys.Lett.B683:101-107,2010 | 10.1016/j.physletb.2009.11.064 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the thermodynamic properties of dark energy (DE) with Quintom
matter in spinor scenario. (1).Using the Cardy-Verlinde formula, we investigate
the conditions of validity of the Generalized Second Law of thermodynamics
(GSL) in the four evolutionary phases of Spinor Quintom-B model. We also
clarify its relat... | [
{
"created": "Sun, 11 Jan 2009 13:48:16 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Nov 2010 08:30:09 GMT",
"version": "v2"
}
] | 2010-11-25 | [
[
"Wang",
"Jing",
""
],
[
"Cui",
"Shu-wang",
""
],
[
"Zhang",
"Cheng-min",
""
]
] | We discuss the thermodynamic properties of dark energy (DE) with Quintom matter in spinor scenario. (1).Using the Cardy-Verlinde formula, we investigate the conditions of validity of the Generalized Second Law of thermodynamics (GSL) in the four evolutionary phases of Spinor Quintom-B model. We also clarify its relatio... |
1206.0635 | Naresh Dadhich | Naresh Dadhich | Einstein is Newton with space curved | 5 pages, A pedagogical note | Current Science, {\bf 109}, 260 (2015) | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The two defining features of the Einsteinian gravity are that it is self
interactive as well as it links universally to all particles including zero
mass particles. In the process of obtaining the Schwarzshild solution for
gravitational field of a mass point, we would demonstrate how are these
features incorporated? ... | [
{
"created": "Fri, 1 Jun 2012 09:40:21 GMT",
"version": "v1"
}
] | 2015-08-06 | [
[
"Dadhich",
"Naresh",
""
]
] | The two defining features of the Einsteinian gravity are that it is self interactive as well as it links universally to all particles including zero mass particles. In the process of obtaining the Schwarzshild solution for gravitational field of a mass point, we would demonstrate how are these features incorporated? We... |
1010.2165 | Bernard Kelly | Joan M. Centrella, John G. Baker, Bernard J. Kelly, and James R. van
Meter | The Final Merger of Black-Hole Binaries | 57 pages; 9 figures. Updated references & fixed typos. Published
version is at
http://www.annualreviews.org/doi/abs/10.1146/annurev.nucl.010909.083246 | Ann.Rev.Nucl.Part.Sci.60:75-100,2010 | 10.1146/annurev.nucl.010909.083246 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent breakthroughs in the field of numerical relativity have led to
dramatic progress in understanding the predictions of General Relativity for
the dynamical interactions of two black holes in the regime of very strong
gravitational fields. Such black-hole binaries are important astrophysical
systems and are a key... | [
{
"created": "Mon, 11 Oct 2010 17:28:07 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Dec 2010 22:14:47 GMT",
"version": "v2"
}
] | 2011-02-18 | [
[
"Centrella",
"Joan M.",
""
],
[
"Baker",
"John G.",
""
],
[
"Kelly",
"Bernard J.",
""
],
[
"van Meter",
"James R.",
""
]
] | Recent breakthroughs in the field of numerical relativity have led to dramatic progress in understanding the predictions of General Relativity for the dynamical interactions of two black holes in the regime of very strong gravitational fields. Such black-hole binaries are important astrophysical systems and are a key t... |
1802.00774 | Laszlo B. Szabados | L\'aszl\'o B. Szabados, Gy\"orgy Wolf | Singularities in Einstein-conformally coupled Higgs cosmological models | 30 pages, 20 figures; three sentences added, typos corrected; final
version | General Relativity and Gravitation, (2018) 50:136 | 10.1007/s10714-018-2457-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of Einstein-conformally coupled Higgs field (EccH) system is
investigated near the initial singularities in the presence of
Friedman-Robertson--Walker symmetries. We solve the field equations
asymptotically up to fourth order near the singularities analytically, and
determine the solutions numerically as... | [
{
"created": "Fri, 2 Feb 2018 17:15:52 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2018 13:19:50 GMT",
"version": "v2"
}
] | 2018-10-17 | [
[
"Szabados",
"László B.",
""
],
[
"Wolf",
"György",
""
]
] | The dynamics of Einstein-conformally coupled Higgs field (EccH) system is investigated near the initial singularities in the presence of Friedman-Robertson--Walker symmetries. We solve the field equations asymptotically up to fourth order near the singularities analytically, and determine the solutions numerically as w... |
gr-qc/0309017 | D. Petroff | David Petroff | The Post-Newtonian Maclaurin Spheroids to Arbitrary Order | 31 pages, 3 figures | Phys.Rev. D68 (2003) 104029 | 10.1103/PhysRevD.68.104029 | null | gr-qc | null | In this paper, we develop an iterative scheme to enable the explicit
calculation of an arbitrary post-Newtonian order for a relativistic body that
reduces to the Maclaurin spheroid in the appropriate limit. This scheme allows
for an analysis of the structure of the solution in the vicinity of bifurcation
points along... | [
{
"created": "Wed, 3 Sep 2003 07:58:28 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Dec 2003 16:32:54 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Petroff",
"David",
""
]
] | In this paper, we develop an iterative scheme to enable the explicit calculation of an arbitrary post-Newtonian order for a relativistic body that reduces to the Maclaurin spheroid in the appropriate limit. This scheme allows for an analysis of the structure of the solution in the vicinity of bifurcation points along t... |
0909.4263 | Nicolas Yunes | Nicolas Yunes, Alessandra Buonanno, Scott A. Hughes, M. Coleman
Miller, Yi Pan | Modeling Extreme Mass Ratio Inspirals within the Effective-One-Body
Approach | 4 pages, 3 figures, replaced with version accepted for publication in
Phys. Rev. Letts | Phys.Rev.Lett.104:091102,2010 | 10.1103/PhysRevLett.104.091102 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first models of extreme-mass-ratio inspirals within the
effective-one-body (EOB) formalism, focusing on quasi-circular orbits into
non-rotating black holes. We show that the phase difference and (Newtonian
normalized) amplitude difference between analytical EOB and numerical
Teukolsky-based gravitation... | [
{
"created": "Wed, 23 Sep 2009 17:47:01 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2010 14:56:41 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Yunes",
"Nicolas",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Hughes",
"Scott A.",
""
],
[
"Miller",
"M. Coleman",
""
],
[
"Pan",
"Yi",
""
]
] | We present the first models of extreme-mass-ratio inspirals within the effective-one-body (EOB) formalism, focusing on quasi-circular orbits into non-rotating black holes. We show that the phase difference and (Newtonian normalized) amplitude difference between analytical EOB and numerical Teukolsky-based gravitational... |
gr-qc/0409108 | Patricio S. Letelier | D. Vogt and P. S. Letelier | Exact Relativistic Static Charged Perfect Fluid Disks | "pages, RevTex. Phys. Rev. D (in press) | Phys.Rev. D70 (2004) 064003 | 10.1103/PhysRevD.70.064003 | null | gr-qc astro-ph | null | Using the well-known ``displace, cut and reflect'' method used to generate
disks from given solutions of Einstein field equations, we construct static
charged disks made of perfect fluid based on the Reissner-Nordstr\"{o}m
solution in isotropic coordinates. We also derive a simple stability condition
for charged and ... | [
{
"created": "Tue, 28 Sep 2004 17:29:53 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Vogt",
"D.",
""
],
[
"Letelier",
"P. S.",
""
]
] | Using the well-known ``displace, cut and reflect'' method used to generate disks from given solutions of Einstein field equations, we construct static charged disks made of perfect fluid based on the Reissner-Nordstr\"{o}m solution in isotropic coordinates. We also derive a simple stability condition for charged and no... |
1101.2334 | Luca Fabbri | Luca Fabbri | Conformal Gravity with Dirac Matter | 7 pages | Annales Fond.Broglie 38:155-165,2013 | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, we have constructed the conformal gravity with metric and torsion,
finding the gravitational field equations that give the conservation laws and
trace condition; in the present paper we apply this theory to the case of the
Dirac matter field: we shall see that in this case the trace condition becomes
trivia... | [
{
"created": "Wed, 12 Jan 2011 11:50:44 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2011 19:29:00 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Oct 2013 22:36:23 GMT",
"version": "v3"
},
{
"created": "Thu, 10 Apr 2014 12:33:04 GMT",
"version": "v4"
}
] | 2014-04-11 | [
[
"Fabbri",
"Luca",
""
]
] | Recently, we have constructed the conformal gravity with metric and torsion, finding the gravitational field equations that give the conservation laws and trace condition; in the present paper we apply this theory to the case of the Dirac matter field: we shall see that in this case the trace condition becomes trivial,... |
gr-qc/0112069 | Andreas de Vries | Andreas de Vries, Theodor Schmidt-Kaler | The black hole tunnel phenomenon | 6 pages, 2 figures | Phys. Rev. D 65, 104022 (2002) | 10.1103/PhysRevD.65.104022 | null | gr-qc | null | The potentials of spin-weighted wave equations in various Kerr-Newman black
holes are analyzed. They all form singular potential barriers at the event
horizon. Applying the WKB approximation it is shown that no particle can tunnel
out of the interior of a static black hole. However, photons inside a
non-extremely rot... | [
{
"created": "Wed, 26 Dec 2001 09:44:01 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"de Vries",
"Andreas",
""
],
[
"Schmidt-Kaler",
"Theodor",
""
]
] | The potentials of spin-weighted wave equations in various Kerr-Newman black holes are analyzed. They all form singular potential barriers at the event horizon. Applying the WKB approximation it is shown that no particle can tunnel out of the interior of a static black hole. However, photons inside a non-extremely rotat... |
gr-qc/9907085 | Leor Barack | Leor Barack and Amos Ori | Late-time decay of gravitational and electromagnetic perturbations along
the event horizon | 30 pages, REVTeX; Accepted for publication in Physical Review D | Phys.Rev. D60 (1999) 124005 | 10.1103/PhysRevD.60.124005 | null | gr-qc | null | We study analytically, via the Newman-Penrose formalism, the late-time decay
of linear electromagnetic and gravitational perturbations along the event
horizon (EH) of black holes. We first analyze in detail the case of a
Schwarzschild black hole. Using a straightforward local analysis near the EH,
we show that, gener... | [
{
"created": "Tue, 27 Jul 1999 09:39:57 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Aug 1999 08:56:38 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Barack",
"Leor",
""
],
[
"Ori",
"Amos",
""
]
] | We study analytically, via the Newman-Penrose formalism, the late-time decay of linear electromagnetic and gravitational perturbations along the event horizon (EH) of black holes. We first analyze in detail the case of a Schwarzschild black hole. Using a straightforward local analysis near the EH, we show that, generic... |
1201.1138 | Julio Cesar Fabris | John D. Barrow, Antonio B. Batista, Giuseppe Dito, Julio C. Fabris, M.
J. S. Houndjo | Quantum effects near future singularities | Latex file, 16 pages. Proceedings of Primeira Reuniao
Argentino-Brasileira de Gravitacao, Astrofisica e Cosmologia, 4-8 october
2011, Foz de Iguacu, Brasil. References added and reordered | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity allows a variety of future singularities to occur in the
evolution of the universe. At these future singularities, the universe will end
in a singular state after a finite proper time and geometrical invariants of
the space time will diverge. One question that naturally arises with respect to
these... | [
{
"created": "Thu, 5 Jan 2012 11:57:09 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jan 2012 23:39:13 GMT",
"version": "v2"
}
] | 2012-07-06 | [
[
"Barrow",
"John D.",
""
],
[
"Batista",
"Antonio B.",
""
],
[
"Dito",
"Giuseppe",
""
],
[
"Fabris",
"Julio C.",
""
],
[
"Houndjo",
"M. J. S.",
""
]
] | General relativity allows a variety of future singularities to occur in the evolution of the universe. At these future singularities, the universe will end in a singular state after a finite proper time and geometrical invariants of the space time will diverge. One question that naturally arises with respect to these c... |
1804.01544 | Luis Alex Huahuachampi Mamani | Luis A. H. Mamani, Jaqueline Morgan, Alex S. Miranda and Vilson T.
Zanchin | From quasinormal modes of rotating black strings to hydrodynamics of a
moving CFT plasma | 23 pages, 45 figures | Phys. Rev. D 98, 026006 (2018) | 10.1103/PhysRevD.98.026006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A certain identification of points in a planar Schwarzschild-anti de Sitter
(AdS) black hole generates a four-dimensional static black string. In turn, a
rotating black string can be obtained from a static one by means of an
`illegitimate coordinate transformation', a local boost in the compact
direction. On the basi... | [
{
"created": "Wed, 4 Apr 2018 18:00:52 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Jun 2018 04:30:30 GMT",
"version": "v2"
}
] | 2018-07-11 | [
[
"Mamani",
"Luis A. H.",
""
],
[
"Morgan",
"Jaqueline",
""
],
[
"Miranda",
"Alex S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | A certain identification of points in a planar Schwarzschild-anti de Sitter (AdS) black hole generates a four-dimensional static black string. In turn, a rotating black string can be obtained from a static one by means of an `illegitimate coordinate transformation', a local boost in the compact direction. On the basis ... |
1707.01169 | \"Onder D\"unya | Onder Dunya and Metin Arik | Gravitational Wave Solutions to Linearized Jordan-Brans-Dicke Theory on
a Cosmological Background | null | Gen Relativ Gravit (2019) 51: 94 | 10.1007/s10714-019-2579-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Approximate vacuum solutions of Jordan-Brans-Dicke theory for perturbed
scalar field and perturbed Robertson-Walker metric, are found. Solutions for
the scale factor and the scalar field in unperturbed JBD theory are dependent
on the $\omega$ parameter which determines how the scalar field is coupled to
geometry of s... | [
{
"created": "Tue, 4 Jul 2017 22:40:25 GMT",
"version": "v1"
}
] | 2019-08-13 | [
[
"Dunya",
"Onder",
""
],
[
"Arik",
"Metin",
""
]
] | Approximate vacuum solutions of Jordan-Brans-Dicke theory for perturbed scalar field and perturbed Robertson-Walker metric, are found. Solutions for the scale factor and the scalar field in unperturbed JBD theory are dependent on the $\omega$ parameter which determines how the scalar field is coupled to geometry of spa... |
gr-qc/9604009 | Matt Visser | Matt Visser (Washington University) | Gravitational vacuum polarization III: Energy conditions in the (1+1)
Schwarzschild spacetime | 7 pages, ReV_TeX | Phys.Rev.D54:5123-5128,1996 | 10.1103/PhysRevD.54.5123 | null | gr-qc hep-th | null | Building on a pair of earlier papers, I investigate the various point-wise
and averaged energy conditions for the quantum stress-energy tensor
corresponding to a conformally-coupled massless scalar field in the in the
(1+1)-dimensional Schwarzschild spacetime. Because the stress-energy tensors
are analytically known,... | [
{
"created": "Wed, 3 Apr 1996 01:36:01 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Visser",
"Matt",
"",
"Washington University"
]
] | Building on a pair of earlier papers, I investigate the various point-wise and averaged energy conditions for the quantum stress-energy tensor corresponding to a conformally-coupled massless scalar field in the in the (1+1)-dimensional Schwarzschild spacetime. Because the stress-energy tensors are analytically known, I... |
2303.11322 | Tian Zhou | Tian Zhou, Leonardo Modesto | On the analytic extension of regular rotating black holes | 7 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We hereby focus on the analytic geodesic extension of several regular
rotating black holes (RRBHs) obtained throughout the Newman-Janis algorithm
starting from some popular spherically symmetric regular black holes. It turns
out that if the metric is not an even function of Boyer-Lindquist radial
coordinate r, simila... | [
{
"created": "Mon, 20 Mar 2023 17:57:14 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2023 13:03:03 GMT",
"version": "v2"
}
] | 2023-03-31 | [
[
"Zhou",
"Tian",
""
],
[
"Modesto",
"Leonardo",
""
]
] | We hereby focus on the analytic geodesic extension of several regular rotating black holes (RRBHs) obtained throughout the Newman-Janis algorithm starting from some popular spherically symmetric regular black holes. It turns out that if the metric is not an even function of Boyer-Lindquist radial coordinate r, similarl... |
gr-qc/9509028 | Mike Clayton | M.A. Clayton | A Hamiltonian Formulation of Nonsymmetric Gravitational Theories | The notation is cleaned up slightly and minor errors corrected | Int.J.Mod.Phys. A12 (1997) 2437-2457 | 10.1142/S0217751X97001420 | UTPT-95-20 | gr-qc | null | The dynamics of a class of nonsymmetric gravitational theories is presented
in Hamiltonian form. The derivation begins with the first-order action,
treating the generalized connection coefficients as the canonical coordinates
and the densitised components of the inverse of the fundamental tensor as
conjugate momenta.... | [
{
"created": "Fri, 15 Sep 1995 18:45:47 GMT",
"version": "v1"
},
{
"created": "Wed, 15 May 1996 19:41:55 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Clayton",
"M. A.",
""
]
] | The dynamics of a class of nonsymmetric gravitational theories is presented in Hamiltonian form. The derivation begins with the first-order action, treating the generalized connection coefficients as the canonical coordinates and the densitised components of the inverse of the fundamental tensor as conjugate momenta. T... |
gr-qc/0511065 | Ernesto F. Eiroa | Ernesto F. Eiroa | Gravitational lensing by Einstein-Born-Infeld black holes | 16 pages, 4 figures; v2: extended and improved, new references added.
Accepted for publication in Physical Review D | Phys.Rev. D73 (2006) 043002 | 10.1103/PhysRevD.73.043002 | null | gr-qc astro-ph | null | In this paper, charged black holes in general relativity coupled to
Born-Infeld electrodynamics are studied as gravitational lenses. The positions
and magnifications of the relativistic images are obtained using the strong
deflection limit, and the results are compared with those corresponding to a
Reissner-Nordstrom... | [
{
"created": "Sat, 12 Nov 2005 20:14:17 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Jan 2006 15:26:11 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Eiroa",
"Ernesto F.",
""
]
] | In this paper, charged black holes in general relativity coupled to Born-Infeld electrodynamics are studied as gravitational lenses. The positions and magnifications of the relativistic images are obtained using the strong deflection limit, and the results are compared with those corresponding to a Reissner-Nordstrom b... |
1502.06582 | Bernard S. Kay | Bernard S. Kay and Umberto Lupo (York) | Non-existence of isometry-invariant Hadamard states for a Kruskal black
hole in a box and for massless fields on 1+1 Minkowski spacetime with a
uniformly accelerating mirror | 41 pages, 6 figures. Includes 9 page appendix which points out the
existence of, and partially fills, a gap in the proofs of the theorems in
B.S. Kay and R.M. Wald, Physics Reports 207, 49-136 (1991). Several small
corrections and improvements in the exposition. Accepted for publication in
Classical and Quantum... | Class. Quantum Grav. 33 (2016) 215001 (42pp) | 10.1088/0264-9381/33/21/215001 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We conjecture that (when the notion of Hadamard state is suitably adapted)
there is no isometry-invariant Hadamard state for the massive or massless
covariant Klein-Gordon equation defined on the region of the Kruskal spacetime
to the left of a surface of constant Schwarzschild radius in the right
Schwarzschild wedge... | [
{
"created": "Mon, 23 Feb 2015 20:23:18 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Mar 2016 20:35:16 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Sep 2016 22:48:54 GMT",
"version": "v3"
}
] | 2016-10-06 | [
[
"Kay",
"Bernard S.",
"",
"York"
],
[
"Lupo",
"Umberto",
"",
"York"
]
] | We conjecture that (when the notion of Hadamard state is suitably adapted) there is no isometry-invariant Hadamard state for the massive or massless covariant Klein-Gordon equation defined on the region of the Kruskal spacetime to the left of a surface of constant Schwarzschild radius in the right Schwarzschild wedge w... |
1802.09155 | Sebasti\'an Bahamonde | Sebastian Bahamonde, Mihai Marciu, Prabir Rudra | Generalised teleparallel quintom dark energy non-minimally coupled with
the scalar torsion and a boundary term | Matches published version in JCAP. Some small changes in the
numerical section | JCAP04(2018)056 | 10.1088/1475-7516/2018/04/056 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within this work, we propose a new generalised quintom dark energy model in
the teleparallel alternative of general relativity theory, by considering a
non-minimal coupling between the scalar fields of a quintom model with the
scalar torsion component $T$ and the boundary term $B$. In the teleparallel
alternative of ... | [
{
"created": "Mon, 26 Feb 2018 04:35:07 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2018 21:07:11 GMT",
"version": "v2"
}
] | 2018-04-30 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Marciu",
"Mihai",
""
],
[
"Rudra",
"Prabir",
""
]
] | Within this work, we propose a new generalised quintom dark energy model in the teleparallel alternative of general relativity theory, by considering a non-minimal coupling between the scalar fields of a quintom model with the scalar torsion component $T$ and the boundary term $B$. In the teleparallel alternative of ge... |
1908.09670 | Lorenzo Iorio | Lorenzo Iorio | New general relativistic contributions to Mercury's orbital elements and
their measurability | LaTex2e, 14 pages, 1 figure, no tables. Accepted for publication in
The European Physical Journal C | Eur. Phys. J. C (2020) 80: 338 | 10.1140/epjc/s10052-020-7897-7 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically and analytically work out the first-order post-Newtonian (1pN)
orbital effects induced on the semimajor axis $a$, the eccentricity $e$, the
inclination $I$, the longitude of the ascending node $\Omega$, the longitude of
perihelion $\varpi$, and the mean longitude at epoch $\epsilon$ of a test
particle ... | [
{
"created": "Mon, 26 Aug 2019 13:28:37 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Sep 2019 11:01:13 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Apr 2020 15:45:55 GMT",
"version": "v3"
}
] | 2020-04-27 | [
[
"Iorio",
"Lorenzo",
""
]
] | We numerically and analytically work out the first-order post-Newtonian (1pN) orbital effects induced on the semimajor axis $a$, the eccentricity $e$, the inclination $I$, the longitude of the ascending node $\Omega$, the longitude of perihelion $\varpi$, and the mean longitude at epoch $\epsilon$ of a test particle or... |
0901.0115 | Dmitri Gal'tsov | Dmitri V. Gal'tsov | Non-Abelian condensates as alternative for dark energy | Extended version of the talk given at 43-rd Rencontres de Moriond, La
Thuile, March 15-22, 2008. 16 pages, moriond.tex | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review basic features of cosmological models with large-scale classical
non-Abelian Yang-Mills (YM) condensates. There exists a unique SU(2) YM
configuration (generalizable to larger gauge groups) compatible with
homogeneity and isotropy of the three-space which is parameterized by a single
scalar field. In the pa... | [
{
"created": "Wed, 31 Dec 2008 16:31:53 GMT",
"version": "v1"
}
] | 2009-01-21 | [
[
"Gal'tsov",
"Dmitri V.",
""
]
] | We review basic features of cosmological models with large-scale classical non-Abelian Yang-Mills (YM) condensates. There exists a unique SU(2) YM configuration (generalizable to larger gauge groups) compatible with homogeneity and isotropy of the three-space which is parameterized by a single scalar field. In the past... |
1712.02435 | Elias Okon | Gabriel Le\'on, Abhishek Majhi, Elias Okon and Daniel Sudarsky | Expectation of primordial gravity waves generated during inflation | Version accepted for publication | Phys. Rev. D 98, 023512 (2018) | 10.1103/PhysRevD.98.023512 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inflationary paradigm is extremely successful regarding predictions of
temperature anisotropies in the CMB. However, inflation also makes predictions
for a CMB B-mode polarization, which has not been detected. Moreover, the
standard inflationary paradigm is unable to accommodate the evolution from the
initial sta... | [
{
"created": "Wed, 6 Dec 2017 23:02:50 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Jul 2018 17:43:11 GMT",
"version": "v2"
}
] | 2018-07-24 | [
[
"León",
"Gabriel",
""
],
[
"Majhi",
"Abhishek",
""
],
[
"Okon",
"Elias",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | The inflationary paradigm is extremely successful regarding predictions of temperature anisotropies in the CMB. However, inflation also makes predictions for a CMB B-mode polarization, which has not been detected. Moreover, the standard inflationary paradigm is unable to accommodate the evolution from the initial state... |
2310.15508 | Dong-han Yeom | Wei-Chen Lin, Dong-han Yeom, Dejan Stojkovic | Spacetime surgery for black hole fireworks | 16 pages, 8 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We construct an explicit model for the black hole to white hole transition
(known as the black hole fireworks scenario) using the cut-and-paste technique.
We model a black hole collapse using the evolution of a time-like shell in the
background of the loop quantum gravity inspired metric. We then use the
space-like s... | [
{
"created": "Tue, 24 Oct 2023 04:32:03 GMT",
"version": "v1"
}
] | 2023-10-25 | [
[
"Lin",
"Wei-Chen",
""
],
[
"Yeom",
"Dong-han",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | We construct an explicit model for the black hole to white hole transition (known as the black hole fireworks scenario) using the cut-and-paste technique. We model a black hole collapse using the evolution of a time-like shell in the background of the loop quantum gravity inspired metric. We then use the space-like she... |
gr-qc/0506011 | Richard Sones | Richard A. Sones | Quantum geons | 23 pages, 10 figures | null | null | null | gr-qc | null | We describe solutions of the Klein-Gordon equation which are spherically
symmetric and localized, and may be regarded as massive particles without
charge or spin. The proposed model, which is based on the action for a complex
scalar field minimally coupled to the electromagnetic and gravitational fields,
contains no ... | [
{
"created": "Thu, 2 Jun 2005 03:05:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sones",
"Richard A.",
""
]
] | We describe solutions of the Klein-Gordon equation which are spherically symmetric and localized, and may be regarded as massive particles without charge or spin. The proposed model, which is based on the action for a complex scalar field minimally coupled to the electromagnetic and gravitational fields, contains no ad... |
2011.02194 | Maxim Misyura | M.A. Misyura | Gravitation radiation from the collision of particles | 5 pages | Int. J. Mod. Phys. A 35, 2040028 (2020) | 10.1142/S0217751X2040028X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | At the present moment, there is an unresolved problem in the physics of
cosmic rays. The problem concerns the origin of the ultrahigh energy cosmic
rays. One of the possible mechanisms of the particle's birth with such energy
is bound to the processes occurring in the active nuclei of the galaxies. In
this paper, we ... | [
{
"created": "Wed, 4 Nov 2020 09:37:40 GMT",
"version": "v1"
}
] | 2020-11-05 | [
[
"Misyura",
"M. A.",
""
]
] | At the present moment, there is an unresolved problem in the physics of cosmic rays. The problem concerns the origin of the ultrahigh energy cosmic rays. One of the possible mechanisms of the particle's birth with such energy is bound to the processes occurring in the active nuclei of the galaxies. In this paper, we ha... |
1711.01040 | Peter M\'esz\'aros | Peter M\'esz\'aros | Inflation driven by scalar field and solid matter | 23 pages, 3 figures | IJMPD, Vol 28, No. 04, (2019) 1950072 | 10.1142/S021827181950072X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solid inflation is a cosmological model where inflation is driven by fields
which enter the Lagrangian in the same way as body coordinates of a solid
matter enter the equation of state, spontaneously breaking spatial
translational and rotational symmetry. We construct a simple generalization of
this model by adding a... | [
{
"created": "Fri, 3 Nov 2017 07:04:18 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Mar 2019 05:23:53 GMT",
"version": "v2"
}
] | 2019-03-18 | [
[
"Mészáros",
"Peter",
""
]
] | Solid inflation is a cosmological model where inflation is driven by fields which enter the Lagrangian in the same way as body coordinates of a solid matter enter the equation of state, spontaneously breaking spatial translational and rotational symmetry. We construct a simple generalization of this model by adding a s... |
2402.19362 | Sergiu I. Vacaru | Lauren\c{t}iu Bubuianu, Sergiu I. Vacaru, El\c{s}en Veli Veliev, Assel
Zhamysheva | Dark energy and dark matter configurations for wormholes and solitionic
hierarchies of nonmetric Ricci flows and $F(R,T,Q,T_{m})$ gravity | latex23, 11pt, 37 pages, with table of content; published online by
EPJC | Eur. Phys. J. C 84 (2024) 211 | 10.1140/epjc/s10052-024-12530-1 | null | gr-qc astro-ph.CO math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We extend the anholonomic frame and connection deformation method, AFCDM, for
constructing exact and parametric solutions in general relativity, GR, to
geometric flow models and modified gravity theories, MGTs, with nontrivial
torsion and nonmetricity fields. Following abstract geometric or variational
methods, we ca... | [
{
"created": "Thu, 29 Feb 2024 17:13:03 GMT",
"version": "v1"
}
] | 2024-03-01 | [
[
"Bubuianu",
"Laurenţiu",
""
],
[
"Vacaru",
"Sergiu I.",
""
],
[
"Veliev",
"Elşen Veli",
""
],
[
"Zhamysheva",
"Assel",
""
]
] | We extend the anholonomic frame and connection deformation method, AFCDM, for constructing exact and parametric solutions in general relativity, GR, to geometric flow models and modified gravity theories, MGTs, with nontrivial torsion and nonmetricity fields. Following abstract geometric or variational methods, we can ... |
2404.03901 | Koushiki Koushiki | Koushiki, Dipanjan Dey and Pankaj S. Joshi | A bonafide model of structure formation from gravitational collapse | arXiv admin note: text overlap with arXiv:2308.03603 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper explores the cosmological implications of a scalar field with a
specific potential, crucial for achieving the final equilibrium state of
gravitational collapse. We consider a system with two fluids: minimally coupled
matter representing dust-like dark matter and a scalar field acting as dark
energy. Our mo... | [
{
"created": "Fri, 5 Apr 2024 05:49:53 GMT",
"version": "v1"
}
] | 2024-04-08 | [
[
"Koushiki",
"",
""
],
[
"Dey",
"Dipanjan",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | This paper explores the cosmological implications of a scalar field with a specific potential, crucial for achieving the final equilibrium state of gravitational collapse. We consider a system with two fluids: minimally coupled matter representing dust-like dark matter and a scalar field acting as dark energy. Our mode... |
1708.02730 | Parthasarathi Majumdar | Anarya Ray, Pronobesh Maity, Parthasarathi Majumdar | Self-gravity Correction to the Chandrasekhar Limiting Mass of White
Dwarfs | 8 Pages, No figures, Latex, typo in surname of first author corrected
to `Ray' from `Roy; minor other typos corrected; concluding section slightly
expanded with additional remarks; a few references added; no major changes in
rest of text or in results | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While computing the Fermi degeneracy pressure of electrons in a white dwarf
star within the framework of hydrostatic equilibrium, we depart from the extant
practice of treating the electrons as a free fermion gas, by including the
effect of the star's self-gravity as an effective gravitational potential. By
the star'... | [
{
"created": "Wed, 9 Aug 2017 06:39:59 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Aug 2017 09:02:23 GMT",
"version": "v2"
}
] | 2017-08-22 | [
[
"Ray",
"Anarya",
""
],
[
"Maity",
"Pronobesh",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | While computing the Fermi degeneracy pressure of electrons in a white dwarf star within the framework of hydrostatic equilibrium, we depart from the extant practice of treating the electrons as a free fermion gas, by including the effect of the star's self-gravity as an effective gravitational potential. By the star's ... |
gr-qc/9604032 | Juan M. Aguirregabiria | Juan M. Aguirregabiria | Chaotic scattering around black holes | REVTeX, 11 pages, 7 Postscript figures. References to recent
(published and unpublished) works by other authors have been added. Results
and figures remain unchanged | Phys.Lett. A224 (1997) 234-238 | 10.1016/S0375-9601(96)00814-6 | null | gr-qc | null | It is shown that the scattering of a charged test particle by a system of
four extreme Reissner-Nordtr\"om black holes is chaotic in some cases. The
fractal structure of the scattering angle and time delay functions is another
manifestation of the existence of a nonattracting chaotic set: fractal basin
boundaries wer... | [
{
"created": "Tue, 16 Apr 1996 13:37:51 GMT",
"version": "v1"
},
{
"created": "Thu, 9 May 1996 10:21:05 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Aguirregabiria",
"Juan M.",
""
]
] | It is shown that the scattering of a charged test particle by a system of four extreme Reissner-Nordtr\"om black holes is chaotic in some cases. The fractal structure of the scattering angle and time delay functions is another manifestation of the existence of a nonattracting chaotic set: fractal basin boundaries were ... |
0906.1613 | Jose Edgar Madriz Aguilar | Jose Edgar Madriz Aguilar and Carlos Romero | On Weyl cosmology in five dimensions and the cosmological constant | Published on the Proceedings of the Seventh Alexander Friedmann
International Seminar on Gravitation and Cosmology and Satellite Symposium
"60 years of the Casimir Effect", Joao Pessoa, Brazil, 30 June - 4 July, 2008 | Int.J.Mod.Phys.A24:1505-1509,2009 | 10.1142/S0217751X09044899 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk notes we expose the possibility to induce the cosmological
constant from extra dimensions, in a geometrical framework where our
four-dimensional Riemannian space-time is embedded into a five-dimensional Weyl
integrable space. In particular following the approach of the induced matter
theory, we show that... | [
{
"created": "Mon, 8 Jun 2009 23:49:28 GMT",
"version": "v1"
}
] | 2011-03-28 | [
[
"Aguilar",
"Jose Edgar Madriz",
""
],
[
"Romero",
"Carlos",
""
]
] | In this talk notes we expose the possibility to induce the cosmological constant from extra dimensions, in a geometrical framework where our four-dimensional Riemannian space-time is embedded into a five-dimensional Weyl integrable space. In particular following the approach of the induced matter theory, we show that w... |
2311.11977 | Konstantinos Dialektopoulos F. | Bobomurat Ahmedov, Konstantinos F. Dialektopoulos, Jackson Levi Said,
Abdurakhmon Nosirov, Zinovia Oikonomopoulou and Odil Yunusov | Stable bouncing solutions in Teleparallel Horndeski gravity: violations
of the no-go theorem | 18 figures, 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to have singularity-free solutions at the beginning of the Universe,
we need to violate the null energy condition. In the general class of Horndeski
gravity, there are healthy NEC-violating solutions, which however are plagued
with instabilities or some kind of pathologies in the history of the Universe;
thi... | [
{
"created": "Mon, 20 Nov 2023 18:08:54 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Ahmedov",
"Bobomurat",
""
],
[
"Dialektopoulos",
"Konstantinos F.",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Nosirov",
"Abdurakhmon",
""
],
[
"Oikonomopoulou",
"Zinovia",
""
],
[
"Yunusov",
"Odil",
""
]
] | In order to have singularity-free solutions at the beginning of the Universe, we need to violate the null energy condition. In the general class of Horndeski gravity, there are healthy NEC-violating solutions, which however are plagued with instabilities or some kind of pathologies in the history of the Universe; this ... |
1502.00020 | Hans Ohanian | Hans C. Ohanian | Weyl gauge-vector and complex dilaton scalar for conformal symmetry and
its breaking | null | General Relativity and Gravitation, March 2016, 48:25 | 10.1007/s10714-016-2023-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Instead of the scalar "dilaton" field that is usually adopted to construct
conformally invariant Lagrangians for gravitation, we here propose a hybrid
construction, involving both a complex dilaton scalar and a Weyl gauge-vector,
in accord with Weyl's original concept of a non-Riemannian conformal geometry
with a tra... | [
{
"created": "Fri, 30 Jan 2015 21:27:49 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jan 2016 17:17:01 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Mar 2016 16:06:02 GMT",
"version": "v3"
}
] | 2016-03-08 | [
[
"Ohanian",
"Hans C.",
""
]
] | Instead of the scalar "dilaton" field that is usually adopted to construct conformally invariant Lagrangians for gravitation, we here propose a hybrid construction, involving both a complex dilaton scalar and a Weyl gauge-vector, in accord with Weyl's original concept of a non-Riemannian conformal geometry with a trans... |
gr-qc/0402002 | Deborah A. Konkowski | D.A. Konkowski, T.M. Helliwell and V. Arndt | Are classically singular spacetimes quantum mechanically singular as
well? | 3 pages, no figures, submitted to the Proceedings of the Tenth Marcel
Grossmann Meeting on General Relativity, Rio de Janeiro, July 20-26, 2003 | null | 10.1142/9789812704030_0288 | null | gr-qc | null | Are the classical singularities of general relativistic spacetimes, normally
defined by the incompleteness of classical particle paths, still singular if
quantum mechanical particles are used instead? This is the question we will
attempt to answer for particles obeying the quantum mechanical wave equations
for scalar... | [
{
"created": "Sat, 31 Jan 2004 19:33:10 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Konkowski",
"D. A.",
""
],
[
"Helliwell",
"T. M.",
""
],
[
"Arndt",
"V.",
""
]
] | Are the classical singularities of general relativistic spacetimes, normally defined by the incompleteness of classical particle paths, still singular if quantum mechanical particles are used instead? This is the question we will attempt to answer for particles obeying the quantum mechanical wave equations for scalar, ... |
gr-qc/9905026 | Alan J. Weinstein | Barry C. Barish (Caltech) | The Detection of Gravitational Waves with LIGO | 8 pages, 6 bitmap figures, submitted to DPF'99 | null | null | null | gr-qc | null | Gravitational wave emission is expected to arise from a variety of
astrophysical phenomena. A new generation of detectors with sensitivity
consistent with expectation from such sources is being developed. The Laser
Interferometer Gravitational-Wave Observatory (LIGO), one of these ambitious
undertakings, is being dev... | [
{
"created": "Sat, 8 May 1999 17:21:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barish",
"Barry C.",
"",
"Caltech"
]
] | Gravitational wave emission is expected to arise from a variety of astrophysical phenomena. A new generation of detectors with sensitivity consistent with expectation from such sources is being developed. The Laser Interferometer Gravitational-Wave Observatory (LIGO), one of these ambitious undertakings, is being devel... |
2004.04016 | Wen-Biao Han | Wen-Biao Han, Xing-Yu Zhong, Xian Chen, Shuo Xin | Very extreme mass-ratio bursts in the Galaxy and neighbouring galaxies
in relation to space-borne detectors | 4 pages, 11 figures, 1 table | MNRAS 498, L61, 2020 | 10.1093/mnrasl/slaa115 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two recent papers\citep{xmri1, xmri2} revealed that in our Galaxy there are
very extreme-mass-ratio inspirals composed by brown dwarfs and the supermassive
black hole at the center of the Galaxy. The event rates estimated in these
papers are very considerable for future space-borne detectors. In addition,
there are p... | [
{
"created": "Wed, 8 Apr 2020 14:36:58 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Oct 2020 00:11:41 GMT",
"version": "v2"
}
] | 2020-10-22 | [
[
"Han",
"Wen-Biao",
""
],
[
"Zhong",
"Xing-Yu",
""
],
[
"Chen",
"Xian",
""
],
[
"Xin",
"Shuo",
""
]
] | Two recent papers\citep{xmri1, xmri2} revealed that in our Galaxy there are very extreme-mass-ratio inspirals composed by brown dwarfs and the supermassive black hole at the center of the Galaxy. The event rates estimated in these papers are very considerable for future space-borne detectors. In addition, there are plu... |
1511.00383 | Xiao-Xiong Zeng | Xiao-Xiong Zeng, Hongbao Zhang, Li-Fang Li | Phase transition of holographic entanglement entropy in massive gravity | 15 pages, many figures, some statments are added | Physics Letters B 756 (2016) 170 | 10.1016/j.physletb.2016.03.013 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | The phase structure of holographic entanglement entropy is studied in massive
gravity for the quantum systems with finite and infinite volumes, which in the
bulk is dual to calculate the minimal surface area for a black hole and black
brane respectively. In the entanglement entropy$-$temperature plane, we find
for bo... | [
{
"created": "Mon, 2 Nov 2015 05:29:26 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2015 11:05:36 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Mar 2016 08:20:41 GMT",
"version": "v3"
},
{
"created": "Tue, 29 Nov 2016 07:45:14 GMT",
"version": "v4"
}
] | 2016-11-30 | [
[
"Zeng",
"Xiao-Xiong",
""
],
[
"Zhang",
"Hongbao",
""
],
[
"Li",
"Li-Fang",
""
]
] | The phase structure of holographic entanglement entropy is studied in massive gravity for the quantum systems with finite and infinite volumes, which in the bulk is dual to calculate the minimal surface area for a black hole and black brane respectively. In the entanglement entropy$-$temperature plane, we find for both... |
gr-qc/0310057 | Gaelle Boudoul | Gaelle Boudoul, Aurelien Barrau | Cosmology with primordial black holes | null | null | null | null | gr-qc astro-ph | null | Some aspects of Cosmology with primordial black holes are briefly reviewed
| [
{
"created": "Fri, 10 Oct 2003 14:47:28 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Boudoul",
"Gaelle",
""
],
[
"Barrau",
"Aurelien",
""
]
] | Some aspects of Cosmology with primordial black holes are briefly reviewed |
1905.02125 | Emanuel Gallo | Gabriel Crisnejo, Emanuel Gallo and Jos\'e R. Villanueva | Gravitational lensing in dispersive media and deflection angle of
charged massive particles in terms of curvature scalars and energy-momentum
tensor | Matches version to appear in PRD | Phys. Rev. D 100, 044006 (2019) | 10.1103/PhysRevD.100.044006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we extend the approach used in [Emanuel Gallo and Osvaldo M.
Moreschi, Phys. Rev. D 83, 12 083007 (2011)] to the study of weak gravitational
lensing in a plasma medium. First, we present expressions for the deflection
angle and optical scalars in terms of the components of the energy-momentum
tensor for ... | [
{
"created": "Mon, 6 May 2019 16:21:24 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2019 02:59:03 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Jul 2019 19:49:41 GMT",
"version": "v3"
}
] | 2019-08-14 | [
[
"Crisnejo",
"Gabriel",
""
],
[
"Gallo",
"Emanuel",
""
],
[
"Villanueva",
"José R.",
""
]
] | In this work we extend the approach used in [Emanuel Gallo and Osvaldo M. Moreschi, Phys. Rev. D 83, 12 083007 (2011)] to the study of weak gravitational lensing in a plasma medium. First, we present expressions for the deflection angle and optical scalars in terms of the components of the energy-momentum tensor for sp... |
1610.07839 | Daniel R Terno | Valentina Baccetti, Robert B. Mann, and Daniel R. Terno | Role of evaporation in gravitational collapse | 11 pages, 2 figures. Expanded and revised version. Comments welcome | Class. Quantum Grav. 35, 185005 (2018) | 10.1088/1361-6382/aad70e | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility that quantum effects responsible for black
hole radiation do not allow for hori- zon crossing of gravitationally
collapsing matter in a finite time as seen by distant observers. We consider
this in the context of the collapse of evaporating massive thin dust shells
using two families of... | [
{
"created": "Tue, 25 Oct 2016 11:38:12 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Nov 2016 12:40:55 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jun 2017 10:34:01 GMT",
"version": "v3"
}
] | 2018-10-09 | [
[
"Baccetti",
"Valentina",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We investigate the possibility that quantum effects responsible for black hole radiation do not allow for hori- zon crossing of gravitationally collapsing matter in a finite time as seen by distant observers. We consider this in the context of the collapse of evaporating massive thin dust shells using two families of m... |
2101.00038 | Jiri Podolsky | David Matejov, Jiri Podolsky | Uniqueness of extremal isolated horizons and their identification with
horizons of all type D black holes | 46 pages, no figure; final extended version accepted for publication
in Class. Quantum. Grav., the list of authors modified due to the formal
reasons, several references added | Class. Quantum Grav. 38 (2021) 135032 | 10.1088/1361-6382/AC0238 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We systematically investigate axisymmetric extremal isolated horizons (EIHs)
defined by vanishing surface gravity, corresponding to zero temperature. In the
first part, using the Newman-Penrose and GHP formalism we derive the most
general metric function for such EIHs in the Einstein-Maxwell theory, which
complements... | [
{
"created": "Thu, 31 Dec 2020 19:08:39 GMT",
"version": "v1"
},
{
"created": "Tue, 18 May 2021 09:11:34 GMT",
"version": "v2"
}
] | 2021-08-06 | [
[
"Matejov",
"David",
""
],
[
"Podolsky",
"Jiri",
""
]
] | We systematically investigate axisymmetric extremal isolated horizons (EIHs) defined by vanishing surface gravity, corresponding to zero temperature. In the first part, using the Newman-Penrose and GHP formalism we derive the most general metric function for such EIHs in the Einstein-Maxwell theory, which complements t... |
1709.00157 | Kiyoshi Shiraishi | Nahomi Kan, Kiyoshi Shiraishi | Analytical Study of Charged Boson Stars with Large Scalar Self-couplings | 22 pages, 13 figures. a typo fixed | Eur. Phys. J. C (2018) 78: 257 | 10.1140/epjc/s10052-018-5745-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give good approximate analytic solutions for spherical charged boson stars
in the large scalar-self-coupling limit in general relativity. We show that if
the charge $e$ and mass $m$ of the scalar field nearly satisfy the critical
relation $e^2\approx Gm^2$ (where $G$ is the Newton constant), our analytic
expressio... | [
{
"created": "Fri, 1 Sep 2017 05:01:55 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Nov 2017 01:07:54 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Feb 2018 09:40:23 GMT",
"version": "v3"
},
{
"created": "Wed, 28 Mar 2018 02:39:01 GMT",
"version": "v4"
}
] | 2018-03-29 | [
[
"Kan",
"Nahomi",
""
],
[
"Shiraishi",
"Kiyoshi",
""
]
] | We give good approximate analytic solutions for spherical charged boson stars in the large scalar-self-coupling limit in general relativity. We show that if the charge $e$ and mass $m$ of the scalar field nearly satisfy the critical relation $e^2\approx Gm^2$ (where $G$ is the Newton constant), our analytic expressions... |
gr-qc/0403059 | Valery Gavrilov | V. R. Gavrilov, V. N. Melnikov, S. T. Abdyrakhmanov | Friedmann universe with dust and scalar field | 11 pages, 10 figures | Gen.Rel.Grav. 36 (2004) 1579-1592 | 10.1023/B:GERG.0000032150.44910.97 | PFUR-RGS-0001-040314 | gr-qc | null | We study a spatially flat Friedmann model containing a pressureless perfect
fluid (dust) and a scalar field with an unbounded from below potential of the
form $V(\fii)=W_0 - V_0\sinh(\sqrt{3/2}\kappa\fii)$, where the parameters $W_0$
and $V_0$ are arbitrary and $\kappa=\sqrt{8\pi G_N}=M_p^{-1}$. The model is
integrab... | [
{
"created": "Sun, 14 Mar 2004 16:56:35 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Gavrilov",
"V. R.",
""
],
[
"Melnikov",
"V. N.",
""
],
[
"Abdyrakhmanov",
"S. T.",
""
]
] | We study a spatially flat Friedmann model containing a pressureless perfect fluid (dust) and a scalar field with an unbounded from below potential of the form $V(\fii)=W_0 - V_0\sinh(\sqrt{3/2}\kappa\fii)$, where the parameters $W_0$ and $V_0$ are arbitrary and $\kappa=\sqrt{8\pi G_N}=M_p^{-1}$. The model is integrable... |
1102.2694 | Jian-Yang Zhu | Yu Li and Jian-Yang Zhu | Convergence of Perturbations for a Big Bounce in Loop Quantum Cosmology | 8 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the convergence behaviors of the scalar and the vector
perturbations for a big bounce phase in loop quantum cosmology. Two models are
discussed: one is the universe filled by a massless scalar field; the other is
a toy model which is radiation-dominated in the asymptotic past and future. We
find that t... | [
{
"created": "Mon, 14 Feb 2011 08:21:49 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Apr 2011 13:03:40 GMT",
"version": "v2"
}
] | 2011-04-12 | [
[
"Li",
"Yu",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | We investigate the convergence behaviors of the scalar and the vector perturbations for a big bounce phase in loop quantum cosmology. Two models are discussed: one is the universe filled by a massless scalar field; the other is a toy model which is radiation-dominated in the asymptotic past and future. We find that the... |
2104.06978 | Gabriele Bozzola | Gabriele Bozzola and Vasileios Paschalidis | Numerical-relativity simulations of the quasi-circular inspiral and
merger of non-spinning, charged black holes: methods and comparison with
approximate approaches | 26 pages, 16 figures. v2 fixes a typo in equations (E3a) and (E3b) | Phys. Rev. D 104, 044004 (2021) | 10.1103/PhysRevD.104.044004 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present fully general relativistic simulations of the quasi-circular
inspiral and merger of charged, non-spinning, binary black holes with
charge-to-mass ratio $\lambda \le 0.3$. We discuss the key features that
enabled long term and stable evolutions of these binaries. We also present a
formalism for computing th... | [
{
"created": "Wed, 14 Apr 2021 17:02:12 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Aug 2022 16:30:26 GMT",
"version": "v2"
}
] | 2022-08-12 | [
[
"Bozzola",
"Gabriele",
""
],
[
"Paschalidis",
"Vasileios",
""
]
] | We present fully general relativistic simulations of the quasi-circular inspiral and merger of charged, non-spinning, binary black holes with charge-to-mass ratio $\lambda \le 0.3$. We discuss the key features that enabled long term and stable evolutions of these binaries. We also present a formalism for computing the ... |
1705.00552 | Javier Rubio | Javier Rubio, Christof Wetterich | Emergent scale symmetry: Connecting inflation and dark energy | 22 pages, 13 figures, matches the version published in PRD, added
clarifications and references, corrected typos | Phys. Rev. D 96, 063509 (2017) | 10.1103/PhysRevD.96.063509 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity computations suggest the existence of an ultraviolet and an
infrared fixed point where quantum scale invariance emerges as an exact
symmetry. We discuss a particular variable gravity model for the crossover
between these fixed points which can naturally account for inflation and dark
energy, using a s... | [
{
"created": "Mon, 1 May 2017 14:53:08 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Sep 2017 18:39:23 GMT",
"version": "v2"
}
] | 2017-09-20 | [
[
"Rubio",
"Javier",
""
],
[
"Wetterich",
"Christof",
""
]
] | Quantum gravity computations suggest the existence of an ultraviolet and an infrared fixed point where quantum scale invariance emerges as an exact symmetry. We discuss a particular variable gravity model for the crossover between these fixed points which can naturally account for inflation and dark energy, using a sin... |
2408.07350 | Lang Cheng | Yiqian Chen, Lang Cheng, Peng Wang, Haitang Yang | Observational Signatures of Traversable Wormholes | 23 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the observational signatures of traversable
Simpson-Visser wormholes illuminated by luminous celestial spheres and orbiting
hot spots. We demonstrate that when light sources and observers are on the same
side of the wormholes, the images of the wormholes mimic those of black holes.
However, wh... | [
{
"created": "Wed, 14 Aug 2024 07:47:46 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Aug 2024 06:44:27 GMT",
"version": "v2"
}
] | 2024-08-16 | [
[
"Chen",
"Yiqian",
""
],
[
"Cheng",
"Lang",
""
],
[
"Wang",
"Peng",
""
],
[
"Yang",
"Haitang",
""
]
] | In this paper, we study the observational signatures of traversable Simpson-Visser wormholes illuminated by luminous celestial spheres and orbiting hot spots. We demonstrate that when light sources and observers are on the same side of the wormholes, the images of the wormholes mimic those of black holes. However, when... |
gr-qc/0507042 | Etienne Takou | Etienne Takou and Norbert Noutchegueme | Global Existence of Solutions for the Einstein-Boltzmann System with
Cosmological Constant in the Robertson-Walker Space-time | null | null | null | null | gr-qc | null | We prove a global in time existence theorem for the initial values problem
for the Einstein-Boltzmann system with cosmological constant and arbitrarily
large initial data, in the spatially homogeneous case, in a Robertson-Walker
space-time.
| [
{
"created": "Sat, 9 Jul 2005 08:18:39 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Aug 2005 09:59:09 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Takou",
"Etienne",
""
],
[
"Noutchegueme",
"Norbert",
""
]
] | We prove a global in time existence theorem for the initial values problem for the Einstein-Boltzmann system with cosmological constant and arbitrarily large initial data, in the spatially homogeneous case, in a Robertson-Walker space-time. |
1011.5191 | Dionigi Benincasa Mr | Dionigi M. T. Benincasa, Fay Dowker, Bernhard Schmitzer | The Random Discrete Action for 2-Dimensional Spacetime | 20 pages, 10 figures, Typos corrected | Class.Quant.Grav.28:105018,2011 | 10.1088/0264-9381/28/10/105018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A one-parameter family of random variables, called the Discrete Action, is
defined for a 2-dimensional Lorentzian spacetime of finite volume. The single
parameter is a discreteness scale. The expectation value of this Discrete
Action is calculated for various regions of 2D Minkowski spacetime. When a
causally convex ... | [
{
"created": "Tue, 23 Nov 2010 18:29:15 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Nov 2010 22:30:09 GMT",
"version": "v2"
}
] | 2011-07-14 | [
[
"Benincasa",
"Dionigi M. T.",
""
],
[
"Dowker",
"Fay",
""
],
[
"Schmitzer",
"Bernhard",
""
]
] | A one-parameter family of random variables, called the Discrete Action, is defined for a 2-dimensional Lorentzian spacetime of finite volume. The single parameter is a discreteness scale. The expectation value of this Discrete Action is calculated for various regions of 2D Minkowski spacetime. When a causally convex re... |
1402.0354 | Victor N. Pervushin | V.N. Pervushin (Joint Institute of Nuclear Research, Dubna, Russia),
A.E. Pavlov (Department of Theoretical Mechanics, Moscow State
Agri-Engineering University, Moscow, Russia) | Principles of Quantum Universe | 445 pages, 4 Tables, 36 Figures; English translation of the monograph
"Principles of Quantum Universe" 2013, Lambert Academic Publishing,
Saarbrucken, Germany, ISBN: 978-3-659-41551-7 (in Russian) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present monograph is devoted to the theory of gravitation derived
consequently as joint nonlinear realization of conformal and affine symmetries
by means of Cartan differential forms. In the framework of the joint nonlinear
realization of conformal and affine symmetries the interpretation of the last
cosmological... | [
{
"created": "Mon, 3 Feb 2014 12:06:22 GMT",
"version": "v1"
}
] | 2014-02-04 | [
[
"Pervushin",
"V. N.",
"",
"Joint Institute of Nuclear Research, Dubna, Russia"
],
[
"Pavlov",
"A. E.",
"",
"Department of Theoretical Mechanics, Moscow State\n Agri-Engineering University, Moscow, Russia"
]
] | The present monograph is devoted to the theory of gravitation derived consequently as joint nonlinear realization of conformal and affine symmetries by means of Cartan differential forms. In the framework of the joint nonlinear realization of conformal and affine symmetries the interpretation of the last cosmological o... |
gr-qc/0410083 | Donato Bini | Donato Bini, Fernando de Felice, Andrea Geralico | Spinning test particles and clock effect in Kerr spacetime | IOP macros, eps figures n. 12, to appear on Classical and Quantum
Gravity, 2004 | Class.Quant.Grav.21:5441-5456,2004 | 10.1088/0264-9381/21/23/010 | null | gr-qc | null | We study the motion of spinning test particles in Kerr spacetime using the
Mathisson-Papapetrou equations; we impose different supplementary conditions
among the well known Corinaldesi-Papapetrou, Pirani and Tulczyjew's and analyze
their physical implications in order to decide which is the most natural to
use. We fi... | [
{
"created": "Mon, 18 Oct 2004 13:53:19 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Bini",
"Donato",
""
],
[
"de Felice",
"Fernando",
""
],
[
"Geralico",
"Andrea",
""
]
] | We study the motion of spinning test particles in Kerr spacetime using the Mathisson-Papapetrou equations; we impose different supplementary conditions among the well known Corinaldesi-Papapetrou, Pirani and Tulczyjew's and analyze their physical implications in order to decide which is the most natural to use. We find... |
1104.2536 | Stanislav Alexeyev | Stanislav Alexeyev, Kristina Rannu, Dilia Gareeva | Possible observation sequences of Brans-Dicke wormholes | 5 pages, 6 figures | JETP, vol.140 (2011) | 10.1134/S1063776111090019 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this study is to investigate observational features of
Brans-Dicke wormholes in a case if they exist in our Universe. The energy flux
from accretion onto a Brans-Dicke wormhole and the so-called "maximum impact
parameter" are studied (the last one might allow to observe light sources
through a wormhole... | [
{
"created": "Wed, 13 Apr 2011 16:05:41 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Alexeyev",
"Stanislav",
""
],
[
"Rannu",
"Kristina",
""
],
[
"Gareeva",
"Dilia",
""
]
] | The purpose of this study is to investigate observational features of Brans-Dicke wormholes in a case if they exist in our Universe. The energy flux from accretion onto a Brans-Dicke wormhole and the so-called "maximum impact parameter" are studied (the last one might allow to observe light sources through a wormhole t... |
1007.4415 | Tiberiu Harko | Tiberiu Harko, Tomi S. Koivisto, Francisco S. N. Lobo | Palatini formulation of modified gravity with a nonminimal
curvature-matter coupling | 7 pages, no figures; v2, revised and corrected version; new Section
added | Mod.Phys.Lett.A26:1467-1480,2011 | 10.1142/S0217732311035869 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the field equations and the equations of motion for massive test
particles in modified theories of gravity with an arbitrary coupling between
geometry and matter by using the Palatini formalism. We show that the
independent connection can be expressed as the Levi-Civita connection of an
auxiliary, matter La... | [
{
"created": "Mon, 26 Jul 2010 10:15:32 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2011 03:10:05 GMT",
"version": "v2"
}
] | 2011-07-05 | [
[
"Harko",
"Tiberiu",
""
],
[
"Koivisto",
"Tomi S.",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | We derive the field equations and the equations of motion for massive test particles in modified theories of gravity with an arbitrary coupling between geometry and matter by using the Palatini formalism. We show that the independent connection can be expressed as the Levi-Civita connection of an auxiliary, matter Lagr... |
2011.01745 | Francisco Lobo | Mahdi Kord Zangeneh, Francisco S. N. Lobo | Dynamic wormhole geometries in hybrid metric-Palatini gravity | 9 pages, 6 figures. V2: Discussion and references added; now 11
pages, 6 figures. Accepted for publication in Eur.Phys.J.C | Eur. Phys. J. C 81, 285 (2021) | 10.1140/epjc/s10052-021-09059-y | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we analyse the evolution of time-dependent traversable wormhole
geometries in a Friedmann-Lema\^{i}tre-Robertson-Walker background in the
context of the scalar-tensor representation of hybrid metric-Palatini gravity.
We deduce the energy-momentum profile of the matter threading the wormhole
spacetime in... | [
{
"created": "Sun, 1 Nov 2020 22:29:37 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Mar 2021 22:13:38 GMT",
"version": "v2"
}
] | 2021-04-06 | [
[
"Zangeneh",
"Mahdi Kord",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | In this work, we analyse the evolution of time-dependent traversable wormhole geometries in a Friedmann-Lema\^{i}tre-Robertson-Walker background in the context of the scalar-tensor representation of hybrid metric-Palatini gravity. We deduce the energy-momentum profile of the matter threading the wormhole spacetime in t... |
1205.0133 | Chi-Yong Lin | Jen-Tsung Hsiang, Chi-Yong Lin, Da-Shin Lee, and Ray J. Rivers | The role of Causality in Tunable Fermi Gas Condensates | 9 pages, 2 figures. In v.3 the formalism is different from the
existing arXiv versions, but the final results are unchanged. Title changed,
one author added. The article will be published in the special edition of
Journal of Physics: Condensed Matter on "Condensed matter analogues of
cosmology" | J. Phys.: Condens. Matter 25 (2013) 404211 | 10.1088/0953-8984/25/40/404211 | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a new formalism for the description of the condensates of cold
Fermi atoms whose speed of sound can be tuned with the aid of a narrow Feshbach
resonance. We use this to look for spontaneous phonon creation that mimics
spontaneous particle creation in curved space-time in
Friedmann-Robertson-Walker and othe... | [
{
"created": "Tue, 1 May 2012 11:03:28 GMT",
"version": "v1"
},
{
"created": "Fri, 4 May 2012 09:30:40 GMT",
"version": "v2"
},
{
"created": "Sun, 11 Aug 2013 01:50:14 GMT",
"version": "v3"
},
{
"created": "Tue, 17 Sep 2013 01:56:34 GMT",
"version": "v4"
}
] | 2013-09-18 | [
[
"Hsiang",
"Jen-Tsung",
""
],
[
"Lin",
"Chi-Yong",
""
],
[
"Lee",
"Da-Shin",
""
],
[
"Rivers",
"Ray J.",
""
]
] | We develop a new formalism for the description of the condensates of cold Fermi atoms whose speed of sound can be tuned with the aid of a narrow Feshbach resonance. We use this to look for spontaneous phonon creation that mimics spontaneous particle creation in curved space-time in Friedmann-Robertson-Walker and other ... |
1501.03832 | Joan Sola | Joan Sola and Adria Gomez-Valent | The $\bar{\Lambda}CDM$ cosmology: from inflation to dark energy through
running $\Lambda$ | Accepted for publication in Int. J. of Mod. Phys. D | Int. J. Mod. Phys. D 24 (2015) 1541003-1541039 | 10.1142/S0218271815410035 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perhaps the deepest mystery of our accelerating Universe in expansion is the
existence of a tiny and rigid cosmological constant, $\Lambda$. Its size is
many orders of magnitude below the expected one in the standard model of
particle physics. However, an expanding Universe is not expected to have a
static vacuum ene... | [
{
"created": "Thu, 15 Jan 2015 21:18:58 GMT",
"version": "v1"
}
] | 2015-04-03 | [
[
"Sola",
"Joan",
""
],
[
"Gomez-Valent",
"Adria",
""
]
] | Perhaps the deepest mystery of our accelerating Universe in expansion is the existence of a tiny and rigid cosmological constant, $\Lambda$. Its size is many orders of magnitude below the expected one in the standard model of particle physics. However, an expanding Universe is not expected to have a static vacuum energ... |
1910.02741 | Hor\'acio Vieira | H. S. Vieira and V. B. Bezerra | Resonant frequencies of a massless scalar field in the canonical
acoustic black hole spacetime | 14 pages, 2 figures | Gen. Relat. Gravit. 52, 72 (2020) | 10.1007/s10714-020-02726-7 | null | gr-qc cond-mat.stat-mech math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we consider the exact solution of the Klein-Gordon equation
describing a massless scalar field in the spacetime of a four dimensional
canonical acoustic black hole, which is given in terms of the general Heun
function, to investigate the interesting phenomena related to the resonant
frequencies.
| [
{
"created": "Mon, 7 Oct 2019 11:50:46 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Aug 2020 17:22:49 GMT",
"version": "v2"
}
] | 2020-08-10 | [
[
"Vieira",
"H. S.",
""
],
[
"Bezerra",
"V. B.",
""
]
] | In this work we consider the exact solution of the Klein-Gordon equation describing a massless scalar field in the spacetime of a four dimensional canonical acoustic black hole, which is given in terms of the general Heun function, to investigate the interesting phenomena related to the resonant frequencies. |
gr-qc/9604016 | Int. Lab. HTSC and Sse | Sergiu I. Vacaru | Nonlinear Connections in Superbundles and Locally Anisotropic
Supergravity | 43 pages, Revtex | Sergiu Vacaru: Interactions, Strings, and Isotopies in Higher
Order Anisotropic Superspaces (Hadronic Press, Palm Harbor, USA, 1998), pp.
60-88 | null | null | gr-qc dg-ga hep-th math.DG | null | The theory of locally anisotropic superspaces (supersymmetric generalizations
of various types of Kaluza--Klein, Lagrange and Finsler spaces) is laid down.
In this framework we perform the analysis of construction of the supervector
bundles provided with nonlinear and distinguished connections and metric
structures. ... | [
{
"created": "Mon, 8 Apr 1996 08:26:47 GMT",
"version": "v1"
}
] | 2008-02-03 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | The theory of locally anisotropic superspaces (supersymmetric generalizations of various types of Kaluza--Klein, Lagrange and Finsler spaces) is laid down. In this framework we perform the analysis of construction of the supervector bundles provided with nonlinear and distinguished connections and metric structures. Tw... |
2106.09644 | Muhammad Sharif | M. Sharif and Amal Majid | Complexity Analysis of Dynamical Cylinder in Massive Brans-Dicke Gravity | 21 pages, no figure | Eur. Phys. J. Plus. 136(2021)530 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a complexity factor is devised for a non-static cylindrical
system in the framework of massive Brans-Dicke theory. The definition of
complexity is developed by taking into account the essential physical
characteristics (such as anisotropy, inhomogeneity, etc.) of the system. In
order to determine the c... | [
{
"created": "Fri, 4 Jun 2021 03:44:57 GMT",
"version": "v1"
}
] | 2021-06-18 | [
[
"Sharif",
"M.",
""
],
[
"Majid",
"Amal",
""
]
] | In this paper, a complexity factor is devised for a non-static cylindrical system in the framework of massive Brans-Dicke theory. The definition of complexity is developed by taking into account the essential physical characteristics (such as anisotropy, inhomogeneity, etc.) of the system. In order to determine the com... |
2109.14937 | Dipanjan Dey | Divyesh N. Solanki, Parth Bambhaniya, Dipanjan Dey, Pankaj S. Joshi,
Kamlesh N. Pathak | Shadows and precession of orbits in rotating Janis-Newman-Winicour
spacetime | 14 pages, 13 figures | null | 10.1140/epjc/s10052-022-10045-1 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we construct the rotating Janis-Newman-Winicour (JNW) naked
singularity spacetime using Newman-Janis Algorithm (NJA). We analyse NJA with
and without complexification methods and find that the energy conditions do
satisfied when we skip the complexification step. We study the shadows cast by
rotating J... | [
{
"created": "Thu, 30 Sep 2021 09:07:29 GMT",
"version": "v1"
}
] | 2022-02-16 | [
[
"Solanki",
"Divyesh N.",
""
],
[
"Bambhaniya",
"Parth",
""
],
[
"Dey",
"Dipanjan",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Pathak",
"Kamlesh N.",
""
]
] | In this paper, we construct the rotating Janis-Newman-Winicour (JNW) naked singularity spacetime using Newman-Janis Algorithm (NJA). We analyse NJA with and without complexification methods and find that the energy conditions do satisfied when we skip the complexification step. We study the shadows cast by rotating JNW... |
1104.2772 | Chunjing Xie | Joel Smoller, Chunjing Xie | Asymptotic Behavior of Massless Dirac Waves in Schwarzschild geometry | 45 pages | null | 10.1007/s00023-011-0145-9 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we show that massless Dirac waves in the Schwarzschild
geometry decay to zero at a rate $t^{-2\lambda}$, where $\lambda=1, 2,...$ is
the angular momentum. Our technique is to use Chandrasekhar's separation of
variables whereby the Dirac equations split into two sets of wave equations.
For the first set... | [
{
"created": "Thu, 14 Apr 2011 14:15:01 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Smoller",
"Joel",
""
],
[
"Xie",
"Chunjing",
""
]
] | In this paper, we show that massless Dirac waves in the Schwarzschild geometry decay to zero at a rate $t^{-2\lambda}$, where $\lambda=1, 2,...$ is the angular momentum. Our technique is to use Chandrasekhar's separation of variables whereby the Dirac equations split into two sets of wave equations. For the first set, ... |
2010.03734 | Ernesto Contreras | E. Contreras, \'A. Rinc\'on, G. Panotopoulos and P. Bargue\~no | Geodesic analysis and black hole shadows on a general non--extremal
rotating black hole in five--dimensional gauged supergravity | Some reference added | Annals of Physics 432 (2021) 168567 | 10.1016/j.aop.2021.168567 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, motivated by the fact that higher-dimensional theories predict
the existence of black holes which differ from their four-dimensional
counterpart, we analyse the geodesics and black hole shadow cast by a general
non-extremal five-dimensional black hole. The system under consideration
corresponds to the C... | [
{
"created": "Thu, 8 Oct 2020 02:30:52 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2021 22:36:09 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Aug 2021 14:08:17 GMT",
"version": "v3"
}
] | 2021-08-11 | [
[
"Contreras",
"E.",
""
],
[
"Rincón",
"Á.",
""
],
[
"Panotopoulos",
"G.",
""
],
[
"Bargueño",
"P.",
""
]
] | In this work, motivated by the fact that higher-dimensional theories predict the existence of black holes which differ from their four-dimensional counterpart, we analyse the geodesics and black hole shadow cast by a general non-extremal five-dimensional black hole. The system under consideration corresponds to the Cho... |
1205.4321 | Luca Fabbri | Salvatore Capozziello, Mariafelicia De Laurentis, Luca Fabbri, Stefano
Vignolo | Gravitationally Generated Interactions | 23 pages. arXiv admin note: substantial text overlap with
arXiv:1105.6193 and with arXiv:1012.5529 by other author | Contemporary Fundamental Physics, Unification, page 1-37
(Dvoeglazov Editor, Nova Publishers, 2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from a 5D-Riemannian manifold, we show that a reduction mechanism to
4D-spacetimes reproduces Extended Theories of Gravity (ETGs) that are direct
generalizations of Einstein's gravity. In this context, the gravitational
degrees of freedom can be dealt under the standard of spacetime deformations.
Besides, su... | [
{
"created": "Sat, 19 May 2012 12:07:49 GMT",
"version": "v1"
}
] | 2015-03-26 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Fabbri",
"Luca",
""
],
[
"Vignolo",
"Stefano",
""
]
] | Starting from a 5D-Riemannian manifold, we show that a reduction mechanism to 4D-spacetimes reproduces Extended Theories of Gravity (ETGs) that are direct generalizations of Einstein's gravity. In this context, the gravitational degrees of freedom can be dealt under the standard of spacetime deformations. Besides, such... |
1006.3182 | Alicia Herrero | Alicia Herrero and Juan Antonio Morales-Lladosa | Painlev\'e-Gullstrand synchronizations in spherical symmetry | 16 pages | Class.Quant.Grav.27:175007,2010 | 10.1088/0264-9381/27/17/175007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Painlev\'e-Gullstrand synchronization is a slicing of the space-time by a
family of flat spacelike 3-surfaces. For spherically symmetric space-times, we
show that a Painlev\'e-Gullstrand synchronization only exists in the region
where $(dr)^2 \leq 1$, $r$ being the curvature radius of the isometry group
orbits ($2$... | [
{
"created": "Wed, 16 Jun 2010 11:17:24 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Herrero",
"Alicia",
""
],
[
"Morales-Lladosa",
"Juan Antonio",
""
]
] | A Painlev\'e-Gullstrand synchronization is a slicing of the space-time by a family of flat spacelike 3-surfaces. For spherically symmetric space-times, we show that a Painlev\'e-Gullstrand synchronization only exists in the region where $(dr)^2 \leq 1$, $r$ being the curvature radius of the isometry group orbits ($2$-s... |
1912.02139 | T. Damour | Thibault Damour | Classical and quantum scattering in post-Minkowskian gravity | 39 pages, no figures; agrees with published version | Phys. Rev. D 102, 024060 (2020) | 10.1103/PhysRevD.102.024060 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New structural properties of post-Minkowskian (PM) gravity are derived,
notably within its effective one body (EOB) formulation. Our results concern
both the mass dependence, and the high-energy behavior, of the classical
scattering angle. We generalize our previous work by deriving, up to the fourth
post-Minkowskian... | [
{
"created": "Wed, 4 Dec 2019 17:41:29 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2020 18:30:03 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Jul 2020 12:59:53 GMT",
"version": "v3"
}
] | 2020-07-22 | [
[
"Damour",
"Thibault",
""
]
] | New structural properties of post-Minkowskian (PM) gravity are derived, notably within its effective one body (EOB) formulation. Our results concern both the mass dependence, and the high-energy behavior, of the classical scattering angle. We generalize our previous work by deriving, up to the fourth post-Minkowskian (... |
2405.14799 | Jorge Ananias Neto | Gabriella V. Ambr\'osio, Michelly S. Andrade, Paulo R. F. Alves,
Cleber N. Costa, Jorge Ananias Neto and Ronaldo Thibes | Exploring modified Kaniadakis entropy: MOND theory and the Bekenstein
bound conjecture | Corrections to the results obtained for the entropic force and MOND
theory were made | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine the potential of Kaniadakis entropy to describe black-hole
entropy, proposing a modified version accounting for black hole thermodynamics.
We posit a conjecture that the Kaniadakis entropy precisely describes the
Bekenstein-Hawking black-hole entropy. Additionally, we discuss the Modified
Newtonian Dynamic... | [
{
"created": "Thu, 23 May 2024 17:07:20 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2024 20:09:55 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Aug 2024 22:45:23 GMT",
"version": "v3"
}
] | 2024-08-07 | [
[
"Ambrósio",
"Gabriella V.",
""
],
[
"Andrade",
"Michelly S.",
""
],
[
"Alves",
"Paulo R. F.",
""
],
[
"Costa",
"Cleber N.",
""
],
[
"Neto",
"Jorge Ananias",
""
],
[
"Thibes",
"Ronaldo",
""
]
] | We examine the potential of Kaniadakis entropy to describe black-hole entropy, proposing a modified version accounting for black hole thermodynamics. We posit a conjecture that the Kaniadakis entropy precisely describes the Bekenstein-Hawking black-hole entropy. Additionally, we discuss the Modified Newtonian Dynamics ... |
2205.13276 | Mahmood Roshan | Mahmood Roshan and Bahram Mashhoon | Nonlocal Gravity: Modification of Newtonian Gravitational Force in the
Solar System | 27 pages, 1 figure; v2: presentation improved, references added | Universe 8, 470 (2022) | 10.3390/universe8090470 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonlocal gravity (NLG) is a classical nonlocal generalization of Einstein's
theory of gravitation developed in close analogy with the nonlocal
electrodynamics of media. It appears that the nonlocal aspect of the universal
gravitational interaction could simulate dark matter. Within the Newtonian
regime of NLG, we inv... | [
{
"created": "Thu, 26 May 2022 11:27:24 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Sep 2022 07:34:44 GMT",
"version": "v2"
}
] | 2022-09-12 | [
[
"Roshan",
"Mahmood",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | Nonlocal gravity (NLG) is a classical nonlocal generalization of Einstein's theory of gravitation developed in close analogy with the nonlocal electrodynamics of media. It appears that the nonlocal aspect of the universal gravitational interaction could simulate dark matter. Within the Newtonian regime of NLG, we inves... |
0706.2367 | Sylvain Brechet | S. D. Brechet, M. P. Hobson, A. N. Lasenby | Weyssenhoff fluid dynamics in general relativity using a 1+3 covariant
approach | 20 pages | Class.Quant.Grav.24:6329-6348,2007 | 10.1088/0264-9381/24/24/011 | null | gr-qc astro-ph | null | The Weyssenhoff fluid is a perfect fluid with spin where the spin of the
matter fields is the source of torsion in an Einstein-Cartan framework. Obukhov
and Korotky showed that this fluid can be described as an effective fluid with
spin in general relativity. A dynamical analysis of such a fluid is performed
in a gau... | [
{
"created": "Fri, 15 Jun 2007 20:27:05 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2007 10:39:28 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Brechet",
"S. D.",
""
],
[
"Hobson",
"M. P.",
""
],
[
"Lasenby",
"A. N.",
""
]
] | The Weyssenhoff fluid is a perfect fluid with spin where the spin of the matter fields is the source of torsion in an Einstein-Cartan framework. Obukhov and Korotky showed that this fluid can be described as an effective fluid with spin in general relativity. A dynamical analysis of such a fluid is performed in a gauge... |
0808.1596 | Michael Green | Ramin G. Daghigh, Michael D. Green | A Detailed Analytic Study of the Asymptotic Quasinormal Modes of
Schwarzschild-Anti De Sitter Black Holes | 32 pages, 10 figures, Revised on Apr. 24, 2009. Minor errors
corrected | Class. Quantum Grav. 26 (2009) 125017 | 10.1088/0264-9381/26/12/125017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze analytically the asymptotic regions of the quasinormal mode
frequency spectra with infinitely large overtone numbers for $D$-dimensional
Schwarzschild black holes in anti de Sitter spacetimes. In this limit, we
confirm the analytic results obtained previously in the literature using
different methods. In a... | [
{
"created": "Mon, 11 Aug 2008 23:52:26 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jan 2009 20:23:24 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Jun 2009 21:05:03 GMT",
"version": "v3"
}
] | 2009-06-06 | [
[
"Daghigh",
"Ramin G.",
""
],
[
"Green",
"Michael D.",
""
]
] | We analyze analytically the asymptotic regions of the quasinormal mode frequency spectra with infinitely large overtone numbers for $D$-dimensional Schwarzschild black holes in anti de Sitter spacetimes. In this limit, we confirm the analytic results obtained previously in the literature using different methods. In add... |
1704.00998 | Marcin Kisielowski M.Sc. | Marcin Kisielowski | Relation between Regge calculus and BF theory on manifolds with defects | 34 pages, 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Regge calculus the space-time manifold is approximated by certain abstract
simplicial complex, called a pseudo-manifold, and the metric is approximated by
an assignment of a length to each 1-simplex. In this paper for each
pseudomanifold we construct a smooth manifold which we call a manifold with
defects. This ma... | [
{
"created": "Tue, 4 Apr 2017 13:17:57 GMT",
"version": "v1"
}
] | 2017-04-06 | [
[
"Kisielowski",
"Marcin",
""
]
] | In Regge calculus the space-time manifold is approximated by certain abstract simplicial complex, called a pseudo-manifold, and the metric is approximated by an assignment of a length to each 1-simplex. In this paper for each pseudomanifold we construct a smooth manifold which we call a manifold with defects. This mani... |
2108.07570 | Horacio E. Camblong | A. Azizi, H. E. Camblong, A. Chakraborty, C. R. Ordonez, and M. O.
Scully | Quantum optics meets black hole thermodynamics via conformal quantum
mechanics: I. Master equation for acceleration radiation | 34 pages, 2 figures | null | 10.1103/PhysRevD.104.084086 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | A quantum-optics approach is used to study the nature of the acceleration
radiation due to a random atomic cloud falling freely into a generalized
Schwarzschild black hole through a Boulware vacuum. The properties of this
horizon brightened acceleration radiation (HBAR) are analyzed with a master
equation that is ful... | [
{
"created": "Tue, 17 Aug 2021 11:44:30 GMT",
"version": "v1"
}
] | 2021-11-03 | [
[
"Azizi",
"A.",
""
],
[
"Camblong",
"H. E.",
""
],
[
"Chakraborty",
"A.",
""
],
[
"Ordonez",
"C. R.",
""
],
[
"Scully",
"M. O.",
""
]
] | A quantum-optics approach is used to study the nature of the acceleration radiation due to a random atomic cloud falling freely into a generalized Schwarzschild black hole through a Boulware vacuum. The properties of this horizon brightened acceleration radiation (HBAR) are analyzed with a master equation that is fully... |
1611.09221 | Mark D. Roberts | Mark D. Roberts | Non-metric Quantum Cosmology | Written for Hindawi Quantum Gravity and Early Universe Cosmology | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theory has arbitrary functions of the scalar field in front of
the geometric and scalar terms in the Lagrangain. The extent to which these
arbitrary functions appear in the Wheeler-deWitt wavefunction of mini-super
Robertson-Walker spacetimes is discussed. The function of the scalar field in
front of th... | [
{
"created": "Thu, 24 Nov 2016 17:11:06 GMT",
"version": "v1"
}
] | 2016-11-29 | [
[
"Roberts",
"Mark D.",
""
]
] | Scalar-tensor theory has arbitrary functions of the scalar field in front of the geometric and scalar terms in the Lagrangain. The extent to which these arbitrary functions appear in the Wheeler-deWitt wavefunction of mini-super Robertson-Walker spacetimes is discussed. The function of the scalar field in front of the ... |
1709.00188 | Sandipan Sengupta | Romesh Kaul and Sandipan Sengupta | A degenerate extension of the Schwarzschild exterior | A typo has been corrected | Phys. Rev. D 96, 104011 (2017) | 10.1103/PhysRevD.96.104011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present vacuum spacetime solutions of first order gravity, which are
described by the exterior Schwarzschild geometry in one region and by
degenerate tetrads in the other. The invertible and noninvertible phases of the
tetrad meet at an intermediate boundary across which the components of the
metric, affine connec... | [
{
"created": "Fri, 1 Sep 2017 07:44:41 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Sep 2017 07:33:36 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Kaul",
"Romesh",
""
],
[
"Sengupta",
"Sandipan",
""
]
] | We present vacuum spacetime solutions of first order gravity, which are described by the exterior Schwarzschild geometry in one region and by degenerate tetrads in the other. The invertible and noninvertible phases of the tetrad meet at an intermediate boundary across which the components of the metric, affine connecti... |
2305.11723 | Bernard S. Kay | Bernard S. Kay (York) | Matter-gravity entanglement entropy and the second law for black holes | 14 pages, 3 figures. (Tiny revision of) essay written for the Gravity
Research Foundation 2023 Awards for Essays on Gravitation; received an
honorable mention. arXiv admin note: substantial text overlap with
arXiv:2206.07445 | International Journal of Modern Physics D 32 (14) ( 2023) 2342002 | 10.1142/S0218271823420026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking showed that a black hole formed by collapse will emit radiation and
eventually disappear. We address the challenge to define an objective notion of
physical entropy which increases throughout this process in a way consistent
with unitarity. We have suggested that (instead of coarse-grained entropy)
physical e... | [
{
"created": "Fri, 19 May 2023 15:01:07 GMT",
"version": "v1"
}
] | 2023-12-18 | [
[
"Kay",
"Bernard S.",
"",
"York"
]
] | Hawking showed that a black hole formed by collapse will emit radiation and eventually disappear. We address the challenge to define an objective notion of physical entropy which increases throughout this process in a way consistent with unitarity. We have suggested that (instead of coarse-grained entropy) physical ent... |
gr-qc/0703063 | Fang-Pei Chen | Fang-Pei Chen | Field Equations and Conservation Laws Derived from the Generalized
Einstein Lagrangian Density for A Gravitational System and Their Implications
to Cosmology | 25 pages, no figure, accepted by International Journal of Theoretical
Physics | Int.J.Theor.Phys.47:421-437,2008 | 10.1007/s10773-007-9463-6 | null | gr-qc | null | Based on investigations of the fundamental properties of the generalized
Einstein Lagrangian density for a gravitational system, the theoretical
foundations of the modified Einstein field equations and the Lorentz and
Levi-Civita conservation laws are systematically studied. The theory of
cosmology developed on the b... | [
{
"created": "Sat, 10 Mar 2007 10:25:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chen",
"Fang-Pei",
""
]
] | Based on investigations of the fundamental properties of the generalized Einstein Lagrangian density for a gravitational system, the theoretical foundations of the modified Einstein field equations and the Lorentz and Levi-Civita conservation laws are systematically studied. The theory of cosmology developed on the bas... |
0711.3164 | Shankaranarayanan S | Saurya Das (U. of Lethbridge), S. Shankaranarayanan (AEI, Potsdam;
ICG, Portsmouth), Sourav Sur (U. of Lethbridge) | Power-law corrections to black-hole entropy via entanglement | 10 pages, 5 figures, to appear in the Proceedings of "BH2, Dynamics
and Thermodynamics of Blackholes and Naked Singularities", May 10-12 2007,
Milano, Italy; conference website: http://www.mate.polimi.it/bh2/ | null | null | null | gr-qc | null | We consider the entanglement between quantum field degrees of freedom inside
and outside the horizon as a plausible source of black-hole entropy. We examine
possible deviations of black hole entropy from area proportionality. We show
that while the area law holds when the field is in its ground state, a
correction te... | [
{
"created": "Tue, 20 Nov 2007 17:41:52 GMT",
"version": "v1"
}
] | 2007-11-21 | [
[
"Das",
"Saurya",
"",
"U. of Lethbridge"
],
[
"Shankaranarayanan",
"S.",
"",
"AEI, Potsdam;\n ICG, Portsmouth"
],
[
"Sur",
"Sourav",
"",
"U. of Lethbridge"
]
] | We consider the entanglement between quantum field degrees of freedom inside and outside the horizon as a plausible source of black-hole entropy. We examine possible deviations of black hole entropy from area proportionality. We show that while the area law holds when the field is in its ground state, a correction term... |
2010.09630 | Konstantin Eder | Konstantin Eder | Super Cartan geometry and the super Ashtekar connection | v2: equivalence proof extended in section 2.1, typos corrected,
references added, 56 pages | null | 10.1007/s00023-023-01290-5 | null | gr-qc hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is devoted to the geometric approach to supergravity. More
precisely, we interpret $\mathcal{N}=1$, $D=4$ supergravity as a super Cartan
geometry which provides a link between supergravity and Yang-Mills theory. To
this end, we first review important aspects of the theory of supermanifolds and
we establish ... | [
{
"created": "Mon, 19 Oct 2020 16:10:01 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Apr 2021 12:14:40 GMT",
"version": "v2"
}
] | 2023-09-18 | [
[
"Eder",
"Konstantin",
""
]
] | This work is devoted to the geometric approach to supergravity. More precisely, we interpret $\mathcal{N}=1$, $D=4$ supergravity as a super Cartan geometry which provides a link between supergravity and Yang-Mills theory. To this end, we first review important aspects of the theory of supermanifolds and we establish a ... |
gr-qc/0501010 | Jerry B. Griffiths | J. B. Griffiths | The stability of Killing-Cauchy horizons in colliding plane wave
space-times | 8 pages. To appear in Gen. Rel. Grav | Gen.Rel.Grav. 37 (2005) 1119-1128 | 10.1007/s10714-005-0094-z | null | gr-qc | null | It is confirmed rigorously that the Killing-Cauchy horizons, which sometimes
occur in space-times representing the collision and subsequent interaction of
plane gravitational waves in a Minkowski background, are unstable with respect
to bounded perturbations of the initial waves, at least for the case in which
the in... | [
{
"created": "Wed, 5 Jan 2005 10:18:18 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Griffiths",
"J. B.",
""
]
] | It is confirmed rigorously that the Killing-Cauchy horizons, which sometimes occur in space-times representing the collision and subsequent interaction of plane gravitational waves in a Minkowski background, are unstable with respect to bounded perturbations of the initial waves, at least for the case in which the init... |
1811.12237 | Abhass Kumar | Abhass Kumar | Inflation and Reheating with a Fermionic Field | 10 pages, 4 figures | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflation has long been the accepted paradigm for understanding the early
universe. Most models of inflation have a scalar field acting as the inflaton
particle which decays after inflation during a process called reheating into
standard model (SM) particles. In this work, we consider a fermion as the
inflaton field.... | [
{
"created": "Wed, 28 Nov 2018 18:58:08 GMT",
"version": "v1"
}
] | 2018-11-30 | [
[
"Kumar",
"Abhass",
""
]
] | Inflation has long been the accepted paradigm for understanding the early universe. Most models of inflation have a scalar field acting as the inflaton particle which decays after inflation during a process called reheating into standard model (SM) particles. In this work, we consider a fermion as the inflaton field. N... |
gr-qc/0010072 | Pascual-Sanchez J.-F. | J.-F. Pascual-S\'anchez | Generalized Hubble law, violation of the cosmological principle and
Supernovae | 4 pages, LaTex, needs crckapb.sty, to be published in Proceedings of
the IV Meeting of the SEA (Spanish Astronomical Society), ed. Kluwer | null | null | null | gr-qc astro-ph | null | The acceleration of the cosmic expansion has been discovered as a consequence
of redshift Supernovae data. In the usual way, this cosmic acceleration is
explained by the presence of a positive cosmological constant or quantum vacuum
energy, in the background of standard Friedmann models. Recently, looking for
an alte... | [
{
"created": "Thu, 19 Oct 2000 18:37:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pascual-Sánchez",
"J. -F.",
""
]
] | The acceleration of the cosmic expansion has been discovered as a consequence of redshift Supernovae data. In the usual way, this cosmic acceleration is explained by the presence of a positive cosmological constant or quantum vacuum energy, in the background of standard Friedmann models. Recently, looking for an altern... |
2009.03328 | Lucrezia Ravera | Damianos Iosifidis, Lucrezia Ravera | Parity Violating Metric-Affine Gravity Theories | 38 pages | Class. Quant. Grav. 38 (2021) no.11, 115003 | 10.1088/1361-6382/abde1a | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a parity violating Metric-Affine gravitational theory given by the
Einstein-Hilbert action plus the so-called Holst term in vacuum. We find out
that for a certain value of the Barbero-Immirzi parameter the total action
possesses a remarkable invariance under particular transformations of the
affine connectio... | [
{
"created": "Mon, 7 Sep 2020 18:00:03 GMT",
"version": "v1"
}
] | 2021-05-21 | [
[
"Iosifidis",
"Damianos",
""
],
[
"Ravera",
"Lucrezia",
""
]
] | We study a parity violating Metric-Affine gravitational theory given by the Einstein-Hilbert action plus the so-called Holst term in vacuum. We find out that for a certain value of the Barbero-Immirzi parameter the total action possesses a remarkable invariance under particular transformations of the affine connection.... |
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