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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2104.06047 | Jian-dong Zhang | Tie-Guang Zi, Jian-dong Zhang, Hui-Min Fan, Xue-Ting Zhang, Yi-Ming
Hu, Changfu Shi, Jianwei Mei | Science with the TianQin Observatory: Preliminary Results on Testing the
No-hair Theorem with EMRI | 10 pages, 9 figures, matches the published version | Phys. Rev. D 104, 064008 (2021) | 10.1103/PhysRevD.104.064008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Constituted with a massive black hole and a stellar mass compact object,
Extreme Mass Ratio Inspiral (EMRI) events hold unique opportunity for the study
of massive black holes, such as by measuring and checking the relations among
the mass, spin and quadrupole moment of a massive black hole, putting the
no-hair theor... | [
{
"created": "Tue, 13 Apr 2021 09:21:43 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Sep 2021 06:04:12 GMT",
"version": "v2"
}
] | 2021-09-06 | [
[
"Zi",
"Tie-Guang",
""
],
[
"Zhang",
"Jian-dong",
""
],
[
"Fan",
"Hui-Min",
""
],
[
"Zhang",
"Xue-Ting",
""
],
[
"Hu",
"Yi-Ming",
""
],
[
"Shi",
"Changfu",
""
],
[
"Mei",
"Jianwei",
""
]
] | Constituted with a massive black hole and a stellar mass compact object, Extreme Mass Ratio Inspiral (EMRI) events hold unique opportunity for the study of massive black holes, such as by measuring and checking the relations among the mass, spin and quadrupole moment of a massive black hole, putting the no-hair theorem... |
2310.13118 | Lorenzo Iorio | Lorenzo Iorio, Bahram Mashhoon | Review of the Gravitomagnetic Clock Effect | Latex2e, 33 pages, no figures, no tables, 129 references. Matching
the version published in Annalen der Physik | Ann. Phys. (Berlin) 536, 2300466 (2024) | 10.1002/andp.202300466 | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general relativistic gravitomagnetic clock effect, in its simplest form,
consists of the non-vanishing difference in the orbital periods of two
counter-orbiting objects moving in opposite directions along circular orbits
lying in the equatorial plane of a central rotating source. We briefly review
both the theore... | [
{
"created": "Thu, 19 Oct 2023 19:28:46 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Oct 2023 13:19:26 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Nov 2023 20:28:14 GMT",
"version": "v3"
},
{
"created": "Sat, 16 Dec 2023 14:42:57 GMT",
"version": "v4"
},
{
"cr... | 2024-01-17 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | The general relativistic gravitomagnetic clock effect, in its simplest form, consists of the non-vanishing difference in the orbital periods of two counter-orbiting objects moving in opposite directions along circular orbits lying in the equatorial plane of a central rotating source. We briefly review both the theoreti... |
1903.02941 | Jean-Philippe Nicolas | Laurent Di Menza, Jean-philippe Nicolas, Mathieu Pellen | A new type of charged black hole bomb | 37 pages, 38 figures | null | 10.1007/s10714-020-2656-5 | Cavendish-HEP-19/04 | gr-qc hep-th math.NA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole bombs are usually constructed by surrounding an ergoregion by a
mirror. The fields propagating between the event horizon and the mirror are
prevented from escaping to infinity and reflected back to the ergoregion, thus
undergoing repeated superradiant scattering which leads to a linear
instability. We intr... | [
{
"created": "Fri, 1 Mar 2019 22:42:45 GMT",
"version": "v1"
}
] | 2020-02-12 | [
[
"Di Menza",
"Laurent",
""
],
[
"Nicolas",
"Jean-philippe",
""
],
[
"Pellen",
"Mathieu",
""
]
] | Black hole bombs are usually constructed by surrounding an ergoregion by a mirror. The fields propagating between the event horizon and the mirror are prevented from escaping to infinity and reflected back to the ergoregion, thus undergoing repeated superradiant scattering which leads to a linear instability. We introd... |
1304.5957 | Tiberiu Harko | Zahra Haghani, Tiberiu Harko, Francisco S. N. Lobo, Hamid Reza
Sepangi, Shahab Shahidi | Further matters in space-time geometry: $f(R,T,R_{\mu\nu}T^{\mu\nu})$
gravity | 13 pages, no figures; major modifications; accepted for publication
in PRD | Phys.Rev.D88:044023,2013 | 10.1103/PhysRevD.88.044023 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a gravitational model in which matter is non-minimally coupled to
geometry, with the effective Lagrangian of the gravitational field being given
by an arbitrary function of the Ricci scalar, the trace of the matter
energy-momentum tensor, and the contraction of the Ricci tensor with the matter
energy-mome... | [
{
"created": "Fri, 19 Apr 2013 07:20:00 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2013 13:17:39 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Jul 2013 18:47:34 GMT",
"version": "v3"
}
] | 2013-08-13 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We consider a gravitational model in which matter is non-minimally coupled to geometry, with the effective Lagrangian of the gravitational field being given by an arbitrary function of the Ricci scalar, the trace of the matter energy-momentum tensor, and the contraction of the Ricci tensor with the matter energy-moment... |
1909.11973 | Jinzhao Wang | Jinzhao Wang | Local gravitational energy in higher dimensions | 5 pages, comments welcome | null | null | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, the local gravitational energy is best characterised
by the quasilocal mass. The small sphere limit of quasilocal mass provides us
the most local notion of gravitational energy. In four dimensions, the limits
were shown be the stress tensor in non-vacuum and the Bel-Robinson tensor in
vacuum. W... | [
{
"created": "Thu, 26 Sep 2019 08:33:50 GMT",
"version": "v1"
}
] | 2019-09-27 | [
[
"Wang",
"Jinzhao",
""
]
] | In general relativity, the local gravitational energy is best characterised by the quasilocal mass. The small sphere limit of quasilocal mass provides us the most local notion of gravitational energy. In four dimensions, the limits were shown be the stress tensor in non-vacuum and the Bel-Robinson tensor in vacuum. We ... |
1511.05238 | Y B Wu | Xue Zhang, Ya-Bo Wu, Song Li, Yu-Chen Liu, Bo-Hai Chen, Yun-Tian Chai,
Shuang Shu | Cosmological evolution of generalized non-local gravity | 16 pages, 6 figures, 1 table | JCAP07(2016)003 | 10.1088/1475-7516/2016/07/003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a class of generalized non-local gravity (GNLG) model which is
the modified theory of general relativity (GR) obtained by adding a term
$m^{2n-2} R\Box^{-n}R$ to the Einstein-Hilbert action. Concretely, we not only
study the gravitational equation for the GNLG model by introducing auxiliary
scalar fields... | [
{
"created": "Tue, 17 Nov 2015 01:04:00 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2015 07:23:07 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Nov 2015 07:46:45 GMT",
"version": "v3"
}
] | 2016-11-23 | [
[
"Zhang",
"Xue",
""
],
[
"Wu",
"Ya-Bo",
""
],
[
"Li",
"Song",
""
],
[
"Liu",
"Yu-Chen",
""
],
[
"Chen",
"Bo-Hai",
""
],
[
"Chai",
"Yun-Tian",
""
],
[
"Shu",
"Shuang",
""
]
] | We construct a class of generalized non-local gravity (GNLG) model which is the modified theory of general relativity (GR) obtained by adding a term $m^{2n-2} R\Box^{-n}R$ to the Einstein-Hilbert action. Concretely, we not only study the gravitational equation for the GNLG model by introducing auxiliary scalar fields, ... |
2302.01580 | Chikun Ding | Chikun Ding, Yu Shi, Jun Chen, Yuebing Zhou, Changqing Liu, Yuehua
Xiao | Rotating BTZ-like black hole and central charges in Einstein-bumblebee
gravity | 15 pages, no figure, accepted by Eur. Phys. J. C; arXiv admin note:
text overlap with arXiv:2201.06683 | Eur. Phys. J. C 83 573 (2023) | 10.1140/epjc/s10052-023-11761-y | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We obtain an exact rotating BTZ-like black hole solution by solving the
corresponding gravitational field equations and the bumblebee motion equations
in Einstein-bumblebee gravity theory. Result is presented for the purely radial
Lorentz symmetry violating and can only exist with a linear functional
potential of the... | [
{
"created": "Fri, 3 Feb 2023 07:18:04 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2023 07:43:15 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jun 2023 00:49:25 GMT",
"version": "v3"
}
] | 2023-07-10 | [
[
"Ding",
"Chikun",
""
],
[
"Shi",
"Yu",
""
],
[
"Chen",
"Jun",
""
],
[
"Zhou",
"Yuebing",
""
],
[
"Liu",
"Changqing",
""
],
[
"Xiao",
"Yuehua",
""
]
] | We obtain an exact rotating BTZ-like black hole solution by solving the corresponding gravitational field equations and the bumblebee motion equations in Einstein-bumblebee gravity theory. Result is presented for the purely radial Lorentz symmetry violating and can only exist with a linear functional potential of the b... |
1402.1401 | Peter Hogan | C. Barrab\`es and P. A. Hogan | Generating a Cosmological Constant with Gravitational Waves | 20 pages, Latex file | General Relativity and Gravitation Journal,(2014)46:1635 | 10.1007/s10714-013-1635-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A technique is given to derive the well known Bell-Szekeres solution of the
Einstein-Maxwell vacuum field equations describing the space-time and the
Maxwell field following the head-on collision of two homogeneous, plane,
electromagnetic shock waves. The analogue of this technique is then utilized to
construct the s... | [
{
"created": "Thu, 6 Feb 2014 16:37:31 GMT",
"version": "v1"
}
] | 2014-02-07 | [
[
"Barrabès",
"C.",
""
],
[
"Hogan",
"P. A.",
""
]
] | A technique is given to derive the well known Bell-Szekeres solution of the Einstein-Maxwell vacuum field equations describing the space-time and the Maxwell field following the head-on collision of two homogeneous, plane, electromagnetic shock waves. The analogue of this technique is then utilized to construct the spa... |
1208.0021 | Iftikhar Ahmad | Iftikhar Ahmad | Observational Constraints on Nfields Phantom Power-Law | The paper has been withdrwan due to modification | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/3.0/ | We investigate the analytical behavior of many scalar fields working
collectively, where {\phi} i is the ith scalar field. Furthermore, we evaluate
its parameter values by applying certain constraints on our model parameters,
and then compare these values with current observational data from
Observational data of CMB... | [
{
"created": "Tue, 31 Jul 2012 20:03:46 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Aug 2012 23:06:46 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Feb 2014 08:09:10 GMT",
"version": "v3"
}
] | 2014-02-25 | [
[
"Ahmad",
"Iftikhar",
""
]
] | We investigate the analytical behavior of many scalar fields working collectively, where {\phi} i is the ith scalar field. Furthermore, we evaluate its parameter values by applying certain constraints on our model parameters, and then compare these values with current observational data from Observational data of CMB, ... |
gr-qc/9611052 | David Garfinkle | David Garfinkle, E.N. Glass and J.P. Krisch | Solution generating with perfect fluids | null | Gen.Rel.Grav. 29 (1997) 467-480 | 10.1023/A:1018882615955 | null | gr-qc | null | We apply a technique, due to Stephani, for generating solutions of the
Einstein-perfect fluid equations. This technique is similar to the vacuum
solution generating techniques of Ehlers, Harrison, Geroch and others. We start
with a ``seed'' solution of the Einstein-perfect fluid equations with a Killing
vector. The s... | [
{
"created": "Thu, 21 Nov 1996 13:26:15 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Garfinkle",
"David",
""
],
[
"Glass",
"E. N.",
""
],
[
"Krisch",
"J. P.",
""
]
] | We apply a technique, due to Stephani, for generating solutions of the Einstein-perfect fluid equations. This technique is similar to the vacuum solution generating techniques of Ehlers, Harrison, Geroch and others. We start with a ``seed'' solution of the Einstein-perfect fluid equations with a Killing vector. The see... |
0712.1025 | Sergey Kozyrev | S.M.Kozyrev | Some questions to experimental gravity | 9 pages | null | null | null | gr-qc | null | The interpretations of solutions of Einstein field's equations led to the
prediction and the observation of physical phenomena which confirm the
important role of general relativity, as well as other relativistic theories in
physics. In this connection, the following questions are of interest and
importance: whether ... | [
{
"created": "Thu, 6 Dec 2007 19:06:08 GMT",
"version": "v1"
}
] | 2007-12-07 | [
[
"Kozyrev",
"S. M.",
""
]
] | The interpretations of solutions of Einstein field's equations led to the prediction and the observation of physical phenomena which confirm the important role of general relativity, as well as other relativistic theories in physics. In this connection, the following questions are of interest and importance: whether it... |
2112.09729 | Jos\'e Domingo Vela Arba\~nil | Jos\'e D. V. Arba\~nil and Grigoris Panotopoulos | Tidal deformability and radial oscillations of anisotropic polytropic
spheres | To appear in PRD | null | 10.1103/PhysRevD.105.024008 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We compute the equilibrium, the fundamental eigenfrequency of oscillations
modes, and quadrupolar tidal deformability of anisotropic polytropic spheres.
These studies are respectively performed through the numerical solution of the
Tolman-Oppenheimer-Volkoff equation, Chandrasekhar radial oscillation
equations, and n... | [
{
"created": "Fri, 17 Dec 2021 19:28:00 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Arbañil",
"José D. V.",
""
],
[
"Panotopoulos",
"Grigoris",
""
]
] | We compute the equilibrium, the fundamental eigenfrequency of oscillations modes, and quadrupolar tidal deformability of anisotropic polytropic spheres. These studies are respectively performed through the numerical solution of the Tolman-Oppenheimer-Volkoff equation, Chandrasekhar radial oscillation equations, and non... |
2101.06402 | Soichiro Isoyama | Hiroyuki Nakano, Ryuichi Fujita, Soichiro Isoyama, Norichika Sago | Scope out multiband gravitational-wave observations of GW190521-like
binary black holes with space gravitational wave antenna B-DECIGO | 26 pages, 2 figures.v2:accepted version.v3:corrects typos in Table.4
(Multiband) and Eq.(A9).References updated | Universe 2021, 7(3), 53 | 10.3390/universe7030053 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational wave event, GW190521 is the most massive binary black hole
merger observed by ground-based gravitational wave observatories LIGO/Virgo to
date. While the observed gravitational-wave signal is mainly in the merger and
ringdown phases, the inspiral gravitational-wave signal of GW190521-like binary
wil... | [
{
"created": "Sat, 16 Jan 2021 08:42:55 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Mar 2021 13:03:28 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Dec 2021 05:21:11 GMT",
"version": "v3"
}
] | 2021-12-28 | [
[
"Nakano",
"Hiroyuki",
""
],
[
"Fujita",
"Ryuichi",
""
],
[
"Isoyama",
"Soichiro",
""
],
[
"Sago",
"Norichika",
""
]
] | The gravitational wave event, GW190521 is the most massive binary black hole merger observed by ground-based gravitational wave observatories LIGO/Virgo to date. While the observed gravitational-wave signal is mainly in the merger and ringdown phases, the inspiral gravitational-wave signal of GW190521-like binary will ... |
gr-qc/0410065 | Belinch\'on Jos\'e Antonio | J. A. Belinch\'on | Full causal bulk viscous LRS Bianchi I with time varying constants | 29 pages, 24 figures | Astrophys.Space Sci. 299 (2005) 341-368 | 10.1007/s10509-005-3424-4 | null | gr-qc | null | In this paper we study the evolution of a LRS Bianchi I Universe, filled with
a bulk viscous cosmological fluid in the presence of time varying constants
"but" taking into account the effects of a c-variable into the curvature
tensor. We find that the only physical models are those which ``constants'' $G$
and $c$ are... | [
{
"created": "Fri, 15 Oct 2004 07:30:03 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Oct 2004 06:19:50 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Belinchón",
"J. A.",
""
]
] | In this paper we study the evolution of a LRS Bianchi I Universe, filled with a bulk viscous cosmological fluid in the presence of time varying constants "but" taking into account the effects of a c-variable into the curvature tensor. We find that the only physical models are those which ``constants'' $G$ and $c$ are g... |
gr-qc/0602077 | Thomas Van Riet | Jelle Hartong, Andr\'e Ploegh, Thomas Van Riet and Dennis B. Westra | Dynamics of Generalized Assisted Inflation | 27 pages | Class.Quant.Grav. 23 (2006) 4593-4614 | 10.1088/0264-9381/23/14/003 | UG-06-02 | gr-qc hep-th | null | We study the dynamics of multiple scalar fields and a barotropic fluid in an
FLRW-universe. The scalar potential is a sum of exponentials. All critical
points are constructed and these include scaling and de Sitter solutions. A
stability analysis of the critical points is performed for generalized assisted
inflation,... | [
{
"created": "Mon, 20 Feb 2006 17:40:28 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hartong",
"Jelle",
""
],
[
"Ploegh",
"André",
""
],
[
"Van Riet",
"Thomas",
""
],
[
"Westra",
"Dennis B.",
""
]
] | We study the dynamics of multiple scalar fields and a barotropic fluid in an FLRW-universe. The scalar potential is a sum of exponentials. All critical points are constructed and these include scaling and de Sitter solutions. A stability analysis of the critical points is performed for generalized assisted inflation, w... |
2004.01265 | Maryam Aghaei Abchouyeh | Maryam Aghaei Abchouyeh, Behrouz Mirza, Parisa Shahidi, Fatemeh
Oboudiat | Late time dynamics of $f(R, T, R_{\mu\nu}T^{\mu\nu})$ gravity | 17 pages, 9 figures | International Journal of Geometric Methods in Modern Physics, Vol.
17, No. 01, 2050008 (2020) | 10.1142/S0219887820500085 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical behavior and future singularities of $f(R, T,R_{\mu\nu}T^{\mu\nu})$
gravitational theory are investigated. This gravitational model is a more
complete form of the $f(R,T)$ gravity which can offer new dynamics for the
universe. We investigate this gravitational theory for the case $f = R + \alpha
R_{\mu\nu}T... | [
{
"created": "Thu, 2 Apr 2020 21:14:08 GMT",
"version": "v1"
}
] | 2020-04-06 | [
[
"Abchouyeh",
"Maryam Aghaei",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Shahidi",
"Parisa",
""
],
[
"Oboudiat",
"Fatemeh",
""
]
] | Dynamical behavior and future singularities of $f(R, T,R_{\mu\nu}T^{\mu\nu})$ gravitational theory are investigated. This gravitational model is a more complete form of the $f(R,T)$ gravity which can offer new dynamics for the universe. We investigate this gravitational theory for the case $f = R + \alpha R_{\mu\nu}T^{... |
2003.04609 | Lorenzo Gavassino | Lorenzo Gavassino, Marco Antonelli and Brynmor Haskell | Bulk viscosity in relativistic fluids: from thermodynamics to
hydrodynamics | 31 pages, 5 figures, published on Classical and Quantum Gravity
(CQG), see https://iopscience.iop.org/article/10.1088/1361-6382/abe588/meta | Class. Quantum Grav. 38 075001 (2021) | 10.1088/1361-6382/abe588 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The approach of extended irreversible thermodynamics consists of promoting
the dissipative fluxes to non-equilibrium thermodynamic variables. In a
relativistic context, this naturally leads to the formulation of the theory of
Israel and Stewart (1979), which is, to date, one of the most successful
theories for relati... | [
{
"created": "Tue, 10 Mar 2020 09:49:51 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Sep 2020 13:36:02 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Apr 2021 13:38:27 GMT",
"version": "v3"
}
] | 2021-04-23 | [
[
"Gavassino",
"Lorenzo",
""
],
[
"Antonelli",
"Marco",
""
],
[
"Haskell",
"Brynmor",
""
]
] | The approach of extended irreversible thermodynamics consists of promoting the dissipative fluxes to non-equilibrium thermodynamic variables. In a relativistic context, this naturally leads to the formulation of the theory of Israel and Stewart (1979), which is, to date, one of the most successful theories for relativi... |
1506.03415 | Dario Brooks A | D. Brooks, D. D. McNutt, J. P. Simard, N. Musoke | Scalar Polynomial Curvature Invariants in the Context of the
Cartan-Karlhede Algorithm | 13 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ the Cartan-Karlhede algorithm in order to completely characterize
the class of G\"odel-like spacetimes for three-dimensional gravity. By
examining the permitted Segre types (or P-types) for the Ricci tensor we
present the results of the Cartan-Karlhede algorithm for each subclass in terms
of the algebraical... | [
{
"created": "Wed, 10 Jun 2015 18:14:30 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Sep 2018 08:21:11 GMT",
"version": "v2"
}
] | 2018-09-06 | [
[
"Brooks",
"D.",
""
],
[
"McNutt",
"D. D.",
""
],
[
"Simard",
"J. P.",
""
],
[
"Musoke",
"N.",
""
]
] | We employ the Cartan-Karlhede algorithm in order to completely characterize the class of G\"odel-like spacetimes for three-dimensional gravity. By examining the permitted Segre types (or P-types) for the Ricci tensor we present the results of the Cartan-Karlhede algorithm for each subclass in terms of the algebraically... |
gr-qc/0604056 | Maximiliano Ujevic | Maximiliano Ujevic and Patricio S. Letelier | Stability of general relativistic static thick disks: the isotropic
Schwarzschild thick disk | 17 pages | Gen.Rel.Grav.39:1345-1365,2007 | 10.1007/s10714-007-0438-y | null | gr-qc astro-ph | null | We study the stability of general relativistic static thick disks, as an
application we consider the thick disk generated by applying the ``displace,
cut, fill and reflect" method, usually known as the image method, to the
Schwarzschild metric in isotropic coordinates. The isotropic Schwarzschild
thick disk obtained ... | [
{
"created": "Tue, 11 Apr 2006 20:17:53 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ujevic",
"Maximiliano",
""
],
[
"Letelier",
"Patricio S.",
""
]
] | We study the stability of general relativistic static thick disks, as an application we consider the thick disk generated by applying the ``displace, cut, fill and reflect" method, usually known as the image method, to the Schwarzschild metric in isotropic coordinates. The isotropic Schwarzschild thick disk obtained fr... |
2302.11274 | Pawan Kumar Gupta | Pawan Kumar Gupta, Jan Steinhoff, Tanja Hinderer | Effect of dynamical gravitomagnetic tides on measurability of tidal
parameters for binary neutron stars using gravitational waves | 20 pages, 14 figures | null | null | null | gr-qc astro-ph.HE astro-ph.SR | http://creativecommons.org/licenses/by/4.0/ | Gravitational waves (GWs) from binary neutron stars (NSs) have opened unique
opportunities to constrain the nuclear equation of state by measuring tidal
effects associated with the excitation of characteristic modes of the NSs. This
includes gravitomagnetic modes associated with the Coriolis effect, whose
frequencies... | [
{
"created": "Wed, 22 Feb 2023 10:47:52 GMT",
"version": "v1"
}
] | 2023-02-23 | [
[
"Gupta",
"Pawan Kumar",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Hinderer",
"Tanja",
""
]
] | Gravitational waves (GWs) from binary neutron stars (NSs) have opened unique opportunities to constrain the nuclear equation of state by measuring tidal effects associated with the excitation of characteristic modes of the NSs. This includes gravitomagnetic modes associated with the Coriolis effect, whose frequencies a... |
1212.6408 | Orest Hrycyna | Orest Hrycyna, Marek Szydlowski | Dynamics of the Bianchi I model with non-minimally coupled scalar field
near the singularity | 4 pages, 2 figures, Multiverse and Fundamental Cosmology
(Multicosmofun'12), Szczecin, Poland, 10-14 September 2012 | AIP Conf.Proc. 1514 (2013) 191 | 10.1063/1.4791754 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical systems methods are used to study the evolution of the Bianchi I
model with a scalar field. We show that inclusion of the non-minimal coupling
term between the scalar field and the curvature changes evolution of the model
compared with the minimally coupled case. In the model with the non-minimally
coupled ... | [
{
"created": "Thu, 27 Dec 2012 18:08:52 GMT",
"version": "v1"
}
] | 2013-10-09 | [
[
"Hrycyna",
"Orest",
""
],
[
"Szydlowski",
"Marek",
""
]
] | Dynamical systems methods are used to study the evolution of the Bianchi I model with a scalar field. We show that inclusion of the non-minimal coupling term between the scalar field and the curvature changes evolution of the model compared with the minimally coupled case. In the model with the non-minimally coupled sc... |
2404.17614 | Ivan Arraut Dr. | Ivan Arraut | Hawking radiation as a manifestation of spontaneous symmetry breaking | 8 pages, published version. Published in Symmetry | Symmetry 2024, 16(5), 519 | 10.3390/sym16050519 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that the black hole evaporation can be modelled as a process
where one symmetry of the system is spontaneously broken continuously. We then
identify three free-parameters of the system. The sign of one of the
free-parameters, governs whether the particles emitted by the black-hole are
fermions or boson... | [
{
"created": "Fri, 26 Apr 2024 09:14:58 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Arraut",
"Ivan",
""
]
] | We demonstrate that the black hole evaporation can be modelled as a process where one symmetry of the system is spontaneously broken continuously. We then identify three free-parameters of the system. The sign of one of the free-parameters, governs whether the particles emitted by the black-hole are fermions or bosons.... |
1702.02795 | Fabrizio De Marchi | Fabrizio De Marchi and Giuseppe Congedo | Space tests of the strong equivalence principle: BepiColombo and the
Sun-Earth Lagrangian points opportunity | 11 pages, 2 figures | Int. J. Mod. Phys. D, 26, 1741021 (2017) | 10.1142/S0218271817410218 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The validity of General Relativity, after 100 years, is supported by solid
experimental evidence. However, there is a lot of interest in pushing the
limits of precision by other experiments. Here we focus our attention on the
equivalence principle, in particular the strong form. The results of ground
experiments and ... | [
{
"created": "Thu, 9 Feb 2017 11:55:43 GMT",
"version": "v1"
}
] | 2017-04-27 | [
[
"De Marchi",
"Fabrizio",
""
],
[
"Congedo",
"Giuseppe",
""
]
] | The validity of General Relativity, after 100 years, is supported by solid experimental evidence. However, there is a lot of interest in pushing the limits of precision by other experiments. Here we focus our attention on the equivalence principle, in particular the strong form. The results of ground experiments and lu... |
2302.06634 | Peter James Nee Mr. | Peter James Nee, Sebastian H. V\"olkel, Harald P. Pfeiffer | Role of black hole quasinormal mode overtones for ringdown analysis | 10 pages, 9 figures | Phys.Rev.D 108 (2023) 4, 044032 | 10.1103/PhysRevD.108.044032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extracting quasinormal modes from compact binary mergers to perform black
hole spectroscopy is one of the fundamental pillars in current and future
strong-gravity tests. Among the most remarkable findings of recent works is
that including a large number of overtones not only reduces the mismatch of the
fitted ringdow... | [
{
"created": "Mon, 13 Feb 2023 19:00:06 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2023 09:49:00 GMT",
"version": "v2"
}
] | 2023-09-19 | [
[
"Nee",
"Peter James",
""
],
[
"Völkel",
"Sebastian H.",
""
],
[
"Pfeiffer",
"Harald P.",
""
]
] | Extracting quasinormal modes from compact binary mergers to perform black hole spectroscopy is one of the fundamental pillars in current and future strong-gravity tests. Among the most remarkable findings of recent works is that including a large number of overtones not only reduces the mismatch of the fitted ringdown ... |
2403.16454 | Md Sabir Ali | Ashima Sood, Md Sabir Ali, J. K. Singh, and Sushant G. Ghosh | Photon orbits and phase transition for Letelier AdS black holes immersed
in perfect fluid dark matter | 17 pages, 14 figures, Accepted for Publication in Chinese Physics C | null | 10.1088/1674-1137/ad361f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain an exact solution of spherically symmetric Letelier AdS black holes
immersed in perfect fluid dark matter (PFDM). Considering the cosmological
constant as the positive pressure of the system and volume as its conjugate
variable, we analyse the thermodynamics of our black holes in the extended
phase space. O... | [
{
"created": "Mon, 25 Mar 2024 06:33:23 GMT",
"version": "v1"
}
] | 2024-03-26 | [
[
"Sood",
"Ashima",
""
],
[
"Ali",
"Md Sabir",
""
],
[
"Singh",
"J. K.",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | We obtain an exact solution of spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter (PFDM). Considering the cosmological constant as the positive pressure of the system and volume as its conjugate variable, we analyse the thermodynamics of our black holes in the extended phase space. Owi... |
gr-qc/9403019 | Serge Droz | A. Bonanno, S. Droz, W. Israel and S.M. Morsink | Structure of the Inner Singularity of a Spherical Black Hole | 5 pages, Latex 5 pages 2 postscript figures,Alberta-Thy-9-94 | Phys.Rev. D50 (1994) 7372-7375 | 10.1103/PhysRevD.50.7372 | null | gr-qc | null | We review the evidence for and against the possibility that the inner
singularity of a black hole contains a lightlike segment which is locally mild
and characterized by mass inflation.
| [
{
"created": "Thu, 10 Mar 1994 01:02:20 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Bonanno",
"A.",
""
],
[
"Droz",
"S.",
""
],
[
"Israel",
"W.",
""
],
[
"Morsink",
"S. M.",
""
]
] | We review the evidence for and against the possibility that the inner singularity of a black hole contains a lightlike segment which is locally mild and characterized by mass inflation. |
2212.13109 | Yoshiyuki Watabiki | Yoshiyuki Watabiki | The causality road from dynamical triangulations to quantum gravity that
describes our Universe | This is a contribution to the Handbook of Quantum Gravity which will
be published in 2023. It will appear as a chapter in the section of the
handbook denoted "Causal Dynamical Triangulations'' | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown how one, guided by causality, starting from so-called dynamical
triangulations, is led to a candidate of quantum gravity that describes our
Universe. This theory is based on W- and Jordan algebras. It explains how our
Universe was created, how cosmic inflation began and ended, how the topology
and the geo... | [
{
"created": "Fri, 23 Dec 2022 01:21:57 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Dec 2023 05:24:03 GMT",
"version": "v2"
}
] | 2023-12-27 | [
[
"Watabiki",
"Yoshiyuki",
""
]
] | It is shown how one, guided by causality, starting from so-called dynamical triangulations, is led to a candidate of quantum gravity that describes our Universe. This theory is based on W- and Jordan algebras. It explains how our Universe was created, how cosmic inflation began and ended, how the topology and the geome... |
1605.08378 | Pedro Bargueno | Pedro Bargue\~no, Sergio Bravo-Medina, Marek Nowakowski and Davide
Batic | Newtonian Cosmology with a Quantum Bounce | null | null | 10.1140/epjc/s10052-016-4386-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been known for some time that the cosmological Friedmann equation
deduced from General Relativity can be also obtained within the Newtonian
framework under certain assumptions. We use this result together with quantum
corrections to the Newtonian potentials to derive a set a of quantum corrected
Friedmann equa... | [
{
"created": "Thu, 26 May 2016 17:45:37 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Bargueño",
"Pedro",
""
],
[
"Bravo-Medina",
"Sergio",
""
],
[
"Nowakowski",
"Marek",
""
],
[
"Batic",
"Davide",
""
]
] | It has been known for some time that the cosmological Friedmann equation deduced from General Relativity can be also obtained within the Newtonian framework under certain assumptions. We use this result together with quantum corrections to the Newtonian potentials to derive a set a of quantum corrected Friedmann equati... |
2009.11082 | Ali \"Ovg\"un Dr. | Wajiha Javed, Muhammad Bilal Khadim, Ali \"Ovg\"un | Weak gravitational lensing by Einstein-non-linear-Maxwell-Yukawa black
hole | 10 pages. Accepted for publication in International Journal of
Geometric Methods in Modern Physics | Int.J.Geom.Meth.Mod.Phys. Vol. 17, No. 12, 2050182 (2020) | 10.1142/S0219887820501820 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we analyze the weak gravitational lensing in the context of
Einstein-non-linear Maxwell-Yukawa black hole. To this desire, we derive the
deflection angle of light by Einstein-non-linear Maxwell-Yukawa black hole
using the Gibbons and Werner method. For this purpose, we obtain the Gaussian
curvature a... | [
{
"created": "Thu, 17 Sep 2020 08:19:56 GMT",
"version": "v1"
}
] | 2020-10-21 | [
[
"Javed",
"Wajiha",
""
],
[
"Khadim",
"Muhammad Bilal",
""
],
[
"Övgün",
"Ali",
""
]
] | In this article, we analyze the weak gravitational lensing in the context of Einstein-non-linear Maxwell-Yukawa black hole. To this desire, we derive the deflection angle of light by Einstein-non-linear Maxwell-Yukawa black hole using the Gibbons and Werner method. For this purpose, we obtain the Gaussian curvature and... |
2011.07474 | Sanjay Sarwe | Sanjay B. Sarwe and Gulshan O. Makkad | Gravitational Collapse of Self-similar Perfect fluid with Scalar
function | There is an error of negative sign in G_tr field equation (9),
thereby scalar function remains real, contrary to the conclusion | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The self-similar spherically symmetric perfect fluid space-time with scalar
function incorporating linear equation of state is studied. The investigation
of gravitational collapse conditions on the space-time determines that scalar
function has an imaginary form $\phi(X) = i \; \alpha_o \; \varphi(X)$,
$\varphi(X)$ b... | [
{
"created": "Sun, 15 Nov 2020 08:12:35 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Nov 2020 11:14:44 GMT",
"version": "v2"
},
{
"created": "Sat, 6 Mar 2021 15:05:35 GMT",
"version": "v3"
}
] | 2021-03-09 | [
[
"Sarwe",
"Sanjay B.",
""
],
[
"Makkad",
"Gulshan O.",
""
]
] | The self-similar spherically symmetric perfect fluid space-time with scalar function incorporating linear equation of state is studied. The investigation of gravitational collapse conditions on the space-time determines that scalar function has an imaginary form $\phi(X) = i \; \alpha_o \; \varphi(X)$, $\varphi(X)$ bei... |
1010.3971 | Javad Taghizadeh firouzjaee | J. T. Firouzjaee, M. Parsi Mood and Reza Mansouri | Do we know the mass of a black hole? Mass of some cosmological black
hole models | 11 pages, 8 figures, revised version, accepted in General Relativity
and Gravitation | null | 10.1007/s10714-011-1297-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a cosmological black hole model proposed recently, we have calculated
the quasi-local mass of a collapsing structure within a cosmological setting
due to different definitions put forward in the last decades to see how similar
or different they are. It has been shown that the mass within the horizon
follows the... | [
{
"created": "Tue, 19 Oct 2010 16:32:22 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2011 18:05:20 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Firouzjaee",
"J. T.",
""
],
[
"Mood",
"M. Parsi",
""
],
[
"Mansouri",
"Reza",
""
]
] | Using a cosmological black hole model proposed recently, we have calculated the quasi-local mass of a collapsing structure within a cosmological setting due to different definitions put forward in the last decades to see how similar or different they are. It has been shown that the mass within the horizon follows the f... |
2405.08624 | Alexandre Arbey | Alexandre Arbey | Primordial black holes, a small review | 8 pages, 7 figures. Contribution to the 2024 Very High Energy
Phenomena in the Universe session of the 58th Rencontres de Moriond | null | null | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the direct discovery of gravitational waves, black holes have regain
interest in the recent years. In particular primordial black holes (PBHs),
which originate from the very early Universe, may constitute (at least in part)
dark matter. The possibility that dark matter is made of black holes is
particularly appe... | [
{
"created": "Tue, 14 May 2024 14:03:00 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Arbey",
"Alexandre",
""
]
] | With the direct discovery of gravitational waves, black holes have regain interest in the recent years. In particular primordial black holes (PBHs), which originate from the very early Universe, may constitute (at least in part) dark matter. The possibility that dark matter is made of black holes is particularly appeal... |
gr-qc/9608052 | Bill Pezzaglia | William M. Pezzaglia Jr. (Physics, Santa Clara University) | Polydimensional Relativity, a Classical Generalization of the
Automorphism Invariance Principle | 12 pages, latex, no figures, Summary of talk to appear in:
Proceedings of the 4th Conference on Clifford Algebras and their Applications
in Mathematical Physics, Lehrstuhl II, f\"ur Mathematik, Aachen, Germany, May
1996}, K. Habetha editor.
ftp://www.clifford.org/clf-alg/preprints/1996/pezz9601.latex | null | null | clf-alg/pezz9601 | gr-qc | null | The automorphism invariant theory of Crawford[J. Math. Phys. 35, 2701 (1994)]
has show great promise, however its application is limited by the paradigm to
the domain of spin space. Our conjecture is that there is a broader principle
at work which applies even to classical physics. Specifically, the laws of
physics s... | [
{
"created": "Thu, 22 Aug 1996 03:43:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pezzaglia",
"William M.",
"Jr.",
"Physics, Santa Clara University"
]
] | The automorphism invariant theory of Crawford[J. Math. Phys. 35, 2701 (1994)] has show great promise, however its application is limited by the paradigm to the domain of spin space. Our conjecture is that there is a broader principle at work which applies even to classical physics. Specifically, the laws of physics sho... |
1704.00698 | Ernesto F. Eiroa | Ernesto F. Eiroa, Griselda Figueroa-Aguirre, Jose M. M. Senovilla | Pure double-layer bubbles in quadratic F(R) gravity | 15 pages, 4 figures; v2: extended and improved version, 5 new
references added. To be published in Physical Review D | Phys. Rev. D 95, 124021 (2017) | 10.1103/PhysRevD.95.124021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a class of spherically symmetric spacetimes corresponding to
bubbles separating two regions with constant values of the scalar curvature, or
equivalently with two different cosmological constants, in quadratic F(R)
theory. The bubbles are obtained by means of the junction formalism, and the
matching hypers... | [
{
"created": "Mon, 3 Apr 2017 17:32:17 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jun 2017 15:30:11 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Figueroa-Aguirre",
"Griselda",
""
],
[
"Senovilla",
"Jose M. M.",
""
]
] | We present a class of spherically symmetric spacetimes corresponding to bubbles separating two regions with constant values of the scalar curvature, or equivalently with two different cosmological constants, in quadratic F(R) theory. The bubbles are obtained by means of the junction formalism, and the matching hypersur... |
1502.06801 | Mattia Villani Mr | Mattia Villani | Constraints on ADM tetrad gravity parameter space from S2 star in the
center of the Galaxy and from the Solar System | 11 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | ADM tetrad gravity is an Hamiltonian reformulation of General Relativity
which gives new insight to the Dark Matter Problem. We impose constraints on
the parameter space of ADM tetrad gravity with a Yukawa-like ansatz for the
trace of the extrinsic curvature of the 3D hypersurfaces by fitting the orbit
of the S2 star... | [
{
"created": "Tue, 24 Feb 2015 13:18:07 GMT",
"version": "v1"
}
] | 2015-02-25 | [
[
"Villani",
"Mattia",
""
]
] | ADM tetrad gravity is an Hamiltonian reformulation of General Relativity which gives new insight to the Dark Matter Problem. We impose constraints on the parameter space of ADM tetrad gravity with a Yukawa-like ansatz for the trace of the extrinsic curvature of the 3D hypersurfaces by fitting the orbit of the S2 star a... |
2202.05432 | Chao Liu | Chao Liu, Todd A. Oliynyk, Jinhua Wang | Future global existence and stability of de Sitter-like solutions to the
Einstein-Yang-Mills equations in spacetime dimensions $n\geq 4$ | 65 pages, accepted by Journal of the European Mathematical Society
(JEMS). Title changed by adding "Future" in front of "global existence" to
emphasize, and minor typos and grammar issues corrected | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the global existence and stability to the future of non-linear
perturbation of de Sitter-like solutions to the Einstein-Yang-Mills system in
$n \geq 4$ spacetime dimension. This generalizes Friedrich's
Einstein-Yang-Mills stability results in dimension $n=4$ [ J Differ Geom 34
(1991), 275-345] to all hig... | [
{
"created": "Fri, 11 Feb 2022 03:56:21 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jan 2024 14:50:43 GMT",
"version": "v2"
}
] | 2024-01-12 | [
[
"Liu",
"Chao",
""
],
[
"Oliynyk",
"Todd A.",
""
],
[
"Wang",
"Jinhua",
""
]
] | We establish the global existence and stability to the future of non-linear perturbation of de Sitter-like solutions to the Einstein-Yang-Mills system in $n \geq 4$ spacetime dimension. This generalizes Friedrich's Einstein-Yang-Mills stability results in dimension $n=4$ [ J Differ Geom 34 (1991), 275-345] to all highe... |
1811.12860 | Yan Peng | Yan Peng | Large regular reflecting stars have no scalar field hair | 8 pages | Eur. Phys. J. C (2019)79:309 | 10.1140/epjc/s10052-019-6821-5 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the gravity system constructed with static scalar fields
coupled to asymptotically flat regular reflecting stars. We consider the matter
field's backreaction on the reflecting star. We analytically show that there is
an upper bound on the radius of the reflecting star. When the star radius is
above the... | [
{
"created": "Fri, 30 Nov 2018 16:05:14 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2018 07:53:15 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Dec 2018 17:15:27 GMT",
"version": "v3"
},
{
"created": "Sun, 7 Apr 2019 13:33:37 GMT",
"version": "v4"
}
] | 2019-04-09 | [
[
"Peng",
"Yan",
""
]
] | We investigate the gravity system constructed with static scalar fields coupled to asymptotically flat regular reflecting stars. We consider the matter field's backreaction on the reflecting star. We analytically show that there is an upper bound on the radius of the reflecting star. When the star radius is above the b... |
1011.2317 | Alan D. Rendall | Alan D. Rendall | Dynamics of solutions of the Einstein equations with twisted Gowdy
symmetry | 17 pages | null | 10.1016/j.geomphys.2011.04.016 | AEI-2010-154 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some of the most interesting results on the global dynamics of solutions of
the vacuum Einstein equations concern the Gowdy spacetimes whose spatial
topology is that of a three-dimensional torus. In this paper certain of these
ideas are extended to a wider class of vacuum spacetimes where the spatial
topology is that... | [
{
"created": "Wed, 10 Nov 2010 09:13:33 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Rendall",
"Alan D.",
""
]
] | Some of the most interesting results on the global dynamics of solutions of the vacuum Einstein equations concern the Gowdy spacetimes whose spatial topology is that of a three-dimensional torus. In this paper certain of these ideas are extended to a wider class of vacuum spacetimes where the spatial topology is that o... |
1102.0825 | Miguel Angel Garcia Aspeitia | Miguel A. Garc\'ia-Aspeitia, Juan Maga\~na and Tonatiuh Matos | Braneworld Model of Dark Matter: Structure Formation | 10 pages, 7 figures, improved, extended in sections IV, V, more
discussions to clarify some issues, references added, typos corrected.
Accepted in GERG | null | 10.1007/s10714-011-1294-3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following a previous work [Gen. Relativ. Gravit. 43 (2011)], we further study
the behavior of a real scalar field in a hidden brane in a configuration of two
branes embedded in a five dimensional bulk. We find an expression for the
equation of state for this scalar field in the visible brane in terms of the
fields of... | [
{
"created": "Fri, 4 Feb 2011 01:36:30 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Aug 2011 22:08:20 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Nov 2011 04:00:54 GMT",
"version": "v3"
}
] | 2012-09-18 | [
[
"García-Aspeitia",
"Miguel A.",
""
],
[
"Magaña",
"Juan",
""
],
[
"Matos",
"Tonatiuh",
""
]
] | Following a previous work [Gen. Relativ. Gravit. 43 (2011)], we further study the behavior of a real scalar field in a hidden brane in a configuration of two branes embedded in a five dimensional bulk. We find an expression for the equation of state for this scalar field in the visible brane in terms of the fields of t... |
1210.3878 | Muhammad Sharif | Muhammad Sharif and Muhammad Zubair | Energy Conditions Constraints and Stability of Power Law Solutions in
f(R,T) Gravity | 25 pages, no figure, accepted for publication in JPSJ | J. Phys. Soc. Jpn. 82(2013)014002 | 10.7566/JPSJ.82.014002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy conditions are derived in the context of $f(R,T)$ gravity, where
$R$ is the Ricci scalar and $T$ is the trace of the energy-momentum tensor,
which can reduce to the well-known conditions in $f(R)$ gravity and general
relativity. We present the general inequalities set by the energy conditions in
terms of H... | [
{
"created": "Mon, 15 Oct 2012 02:47:35 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Nov 2012 04:26:57 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Sharif",
"Muhammad",
""
],
[
"Zubair",
"Muhammad",
""
]
] | The energy conditions are derived in the context of $f(R,T)$ gravity, where $R$ is the Ricci scalar and $T$ is the trace of the energy-momentum tensor, which can reduce to the well-known conditions in $f(R)$ gravity and general relativity. We present the general inequalities set by the energy conditions in terms of Hub... |
gr-qc/0103069 | Yutaka Hosotani | Yutaka Hosotani | Scaling Behavior in the Einstein-Yang-Mills Monopoles and Dyons | 11 pages, 5 figures | J.Math.Phys. 43 (2002) 597 | 10.1063/1.1421637 | OU-HET 356 | gr-qc hep-ph hep-th | null | Scaling behavior in the moduli space of monopole and dyon solutions in the
Einstein-Yang-Mills theory in the asymptotically anti-de Sitter space is
derived. The mass of monopoles and dyons scales with respect to their magnetic
and electric charges, independent of the values of the cosmological constant
and gauge coup... | [
{
"created": "Mon, 19 Mar 2001 05:44:44 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Sep 2001 03:11:03 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Hosotani",
"Yutaka",
""
]
] | Scaling behavior in the moduli space of monopole and dyon solutions in the Einstein-Yang-Mills theory in the asymptotically anti-de Sitter space is derived. The mass of monopoles and dyons scales with respect to their magnetic and electric charges, independent of the values of the cosmological constant and gauge coupli... |
gr-qc/0209043 | Tomizawa | S.Tomizawa and M.Siino | Topological Structure of The Upper End of Future Null Infinity | 9 pages, 2 figures | null | null | null | gr-qc | null | We propose a method to determine the topological structure of an event
horizon far in the future of a spacetime from the geometrical information of
its future null infinity. In the present article, we mainly consider spacetimes
with two black holes. Although, in most of cases, the black holes coalesce and
their event... | [
{
"created": "Thu, 12 Sep 2002 14:09:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tomizawa",
"S.",
""
],
[
"Siino",
"M.",
""
]
] | We propose a method to determine the topological structure of an event horizon far in the future of a spacetime from the geometrical information of its future null infinity. In the present article, we mainly consider spacetimes with two black holes. Although, in most of cases, the black holes coalesce and their event h... |
1106.2495 | Robert Bock | Robert D. Bock | On the Preservation of the Local Properties of Time in General
Relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a theory of gravity based on Einstein's general relativity that is
motivated by the paradoxes associated with time in relativistic rotating frames
and certain exact solutions of Einstein's equations. We show that we can
resolve these paradoxes with a single postulate, namely, the preservation of
the local ... | [
{
"created": "Mon, 13 Jun 2011 17:25:17 GMT",
"version": "v1"
}
] | 2011-06-14 | [
[
"Bock",
"Robert D.",
""
]
] | We present a theory of gravity based on Einstein's general relativity that is motivated by the paradoxes associated with time in relativistic rotating frames and certain exact solutions of Einstein's equations. We show that we can resolve these paradoxes with a single postulate, namely, the preservation of the local pr... |
2212.13825 | Lorenzo Fatibene | S.Camera, S.Capozziello, L.Fatibene, A.Orizzonte | The effective Equation of State in Palatini $f(R)$ cosmology | 19 pages | The European Physical Journal Plus, 2023 | 10.1140/epjp/s13360-023-03676-0 | (138) 180 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate how the cosmological Equation of State can be used for
scrutinizing extended theories of gravity, in particular, the Palatini $f(R)$
gravity. Specifically, the approach consists, at first, in investigating the
effective Equation of State produced by a given model. Then, the inverse
problem can also be ... | [
{
"created": "Wed, 28 Dec 2022 13:56:57 GMT",
"version": "v1"
}
] | 2024-02-27 | [
[
"Camera",
"S.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Fatibene",
"L.",
""
],
[
"Orizzonte",
"A.",
""
]
] | We investigate how the cosmological Equation of State can be used for scrutinizing extended theories of gravity, in particular, the Palatini $f(R)$ gravity. Specifically, the approach consists, at first, in investigating the effective Equation of State produced by a given model. Then, the inverse problem can also be co... |
gr-qc/9406051 | Melnikov Vitaly Nikolaevich | A.A. Kirillov | On description of spatial topologies in quantum gravity | 5 pages | null | null | RGA-CSVR-008/94 | gr-qc | null | A new approach is suggested which allows to describe phenomenologically
arbitrary topologies of the Universe. It consists in a generalizaton of third
quantization. This quantization is carried out for the case of asymptotic
closeness to a cosmological singularity. It is also pointed out that suggested
approach leads ... | [
{
"created": "Mon, 27 Jun 1994 18:49:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kirillov",
"A. A.",
""
]
] | A new approach is suggested which allows to describe phenomenologically arbitrary topologies of the Universe. It consists in a generalizaton of third quantization. This quantization is carried out for the case of asymptotic closeness to a cosmological singularity. It is also pointed out that suggested approach leads to... |
2203.04116 | Gonzalo Olmo | Gonzalo J. Olmo and D. Rubiera-Garcia | Some Recent Results on Ricci-Based Gravity Theories | 15 pages, no figures, IJMPD style | null | 10.1142/S0218271822400120 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Metric-affine theories in which the gravity Lagrangian is built using
(projectively invariant) contractions of the Ricci tensor with itself and with
the metric (Ricci-Based Gravity theories, or RBGs for short) are reviewed. The
goal is to provide a contextualized and coherent presentation of some recent
results. In p... | [
{
"created": "Tue, 8 Mar 2022 14:39:51 GMT",
"version": "v1"
}
] | 2022-07-25 | [
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | Metric-affine theories in which the gravity Lagrangian is built using (projectively invariant) contractions of the Ricci tensor with itself and with the metric (Ricci-Based Gravity theories, or RBGs for short) are reviewed. The goal is to provide a contextualized and coherent presentation of some recent results. In par... |
2312.09171 | Paulo M. S\'a | Paulo M. S\'a | Coupled quintessence inspired by warm inflation | 8 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a coupled quintessence cosmological model in which a
dark-energy scalar field with an exponential potential interacts directly with
a dark-matter fluid through a dissipative term inspired by warm inflation. The
evolution equations of this model give rise to a three-dimensional dynamical
system for whic... | [
{
"created": "Thu, 14 Dec 2023 17:36:57 GMT",
"version": "v1"
}
] | 2023-12-15 | [
[
"Sá",
"Paulo M.",
""
]
] | We investigate a coupled quintessence cosmological model in which a dark-energy scalar field with an exponential potential interacts directly with a dark-matter fluid through a dissipative term inspired by warm inflation. The evolution equations of this model give rise to a three-dimensional dynamical system for which ... |
2403.19933 | Chao Zhang | Chao Zhang, Guoyang Fu and Chunyu Zhang | Rotating galactic black holes | 17 pages, 4 figures; Comments are welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The galactic black hole is a supermassive black hole located at the center of
a galaxy surrounded by a dark matter halo. For the first time, we establish a
generic, fully-relativistic formalism to calculate solutions of Einstein's
gravity minimally coupled to an anisotropic fluid modeled by the Einstein
cluster in ax... | [
{
"created": "Fri, 29 Mar 2024 02:40:12 GMT",
"version": "v1"
}
] | 2024-04-01 | [
[
"Zhang",
"Chao",
""
],
[
"Fu",
"Guoyang",
""
],
[
"Zhang",
"Chunyu",
""
]
] | The galactic black hole is a supermassive black hole located at the center of a galaxy surrounded by a dark matter halo. For the first time, we establish a generic, fully-relativistic formalism to calculate solutions of Einstein's gravity minimally coupled to an anisotropic fluid modeled by the Einstein cluster in axis... |
1308.1448 | Stephen Adler | Stephen L. Adler, Fethi M. Ramazanoglu | Spherically symmetric vacuum solutions arising from trace dynamics
modifications to gravitation | 34 pages. This is an expansion of the previous submission to include
results obtained in collaboration with Fethi M. Ramazanoglu | International Journal of Modern Physics D Vol. 24 No. 2 (2015)
1550011 | 10.1142/S021827181550011X | null | gr-qc astro-ph.CO hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the equations governing static, spherically symmetric vacuum
solutions to the Einstein equations, as modified by the frame-dependent
effective action arising from trace dynamics. We give analytic and numerical
results for the solutions of these equations, first in polar coordinates, and
then in isotropic co... | [
{
"created": "Wed, 7 Aug 2013 00:01:06 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jan 2014 02:10:31 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Aug 2014 15:07:55 GMT",
"version": "v3"
},
{
"created": "Wed, 3 Jun 2015 00:30:43 GMT",
"version": "v4"
}
] | 2015-06-04 | [
[
"Adler",
"Stephen L.",
""
],
[
"Ramazanoglu",
"Fethi M.",
""
]
] | We derive the equations governing static, spherically symmetric vacuum solutions to the Einstein equations, as modified by the frame-dependent effective action arising from trace dynamics. We give analytic and numerical results for the solutions of these equations, first in polar coordinates, and then in isotropic coor... |
2206.06397 | Kristina Giesel | Max Joseph Fahn, Kristina Giesel and Michael Kobler | A gravitationally induced decoherence model using Ashtekar variables | 79 pages | null | 10.1088/1361-6382/acc5d5 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the coupling of a scalar field to linearised gravity and derive a
relativistic gravitationally induced decoherence model using Ashtekar
variables. The model is formulated at the gauge invariant level using suitable
geometrical clocks in the relational formalism, broadening existing gauge
invariant formula... | [
{
"created": "Mon, 13 Jun 2022 18:03:53 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Fahn",
"Max Joseph",
""
],
[
"Giesel",
"Kristina",
""
],
[
"Kobler",
"Michael",
""
]
] | We consider the coupling of a scalar field to linearised gravity and derive a relativistic gravitationally induced decoherence model using Ashtekar variables. The model is formulated at the gauge invariant level using suitable geometrical clocks in the relational formalism, broadening existing gauge invariant formulati... |
1107.2839 | Antonio Enea Romano | Antonio Enea Romano | Discrete gravity from statistical mechanics | 6 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how to construct space time lattices with a Regge action proportional
to the energy of a given Ising or Potts model macrostate. This allows to take
advantage of the existence of exact solutions for these models to calculate the
quantum wave function of the universe using the sum over the histories approach
to... | [
{
"created": "Thu, 14 Jul 2011 14:33:31 GMT",
"version": "v1"
}
] | 2011-07-21 | [
[
"Romano",
"Antonio Enea",
""
]
] | We show how to construct space time lattices with a Regge action proportional to the energy of a given Ising or Potts model macrostate. This allows to take advantage of the existence of exact solutions for these models to calculate the quantum wave function of the universe using the sum over the histories approach to q... |
1410.6877 | Minchuan Zhou | Minchuan Zhou, Zifan Zhou, Selim M. Shahriar | Quantum noise limits in white-light-cavity-enhanced gravitational wave
detectors | 35 pages, 19 figures | Phys. Rev. D 92, 082002 (2015) | 10.1103/PhysRevD.92.082002 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previously, we had proposed a gravitational wave detector that incorporates
the white-light-cavity (WLC) effect using a compound cavity for signal
recycling (CC-SR). Here, we first use an idealized model for the negative
dispersion medium (NDM) and use the so-called Caves model for a
phase-insensitive linear amplifie... | [
{
"created": "Sat, 25 Oct 2014 03:47:48 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Dec 2014 22:06:21 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Jul 2015 15:29:20 GMT",
"version": "v3"
},
{
"created": "Thu, 20 Aug 2015 15:24:41 GMT",
"version": "v4"
},
{
"cr... | 2015-10-28 | [
[
"Zhou",
"Minchuan",
""
],
[
"Zhou",
"Zifan",
""
],
[
"Shahriar",
"Selim M.",
""
]
] | Previously, we had proposed a gravitational wave detector that incorporates the white-light-cavity (WLC) effect using a compound cavity for signal recycling (CC-SR). Here, we first use an idealized model for the negative dispersion medium (NDM) and use the so-called Caves model for a phase-insensitive linear amplifier ... |
1105.1155 | Larry Ford | Chun-Hsien Wu, Jen-Tsung Hsiang, L. H. Ford and Kin-Wang Ng | Gravity Waves from Quantum Stress Tensor Fluctuations in Inflation | 17 -pages, no figures | Phys. Rev. D 84, 103515 (2011) | 10.1103/PhysRevD.84.103515 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the effects of the quantum stress tensor fluctuations of a
conformal field in generating gravity waves in inflationary models. We find a
non-scale invariant, non-Gaussian contribution which depends upon the total
expansion factor between an initial time and the end of inflation. This
spectrum of gravity w... | [
{
"created": "Thu, 5 May 2011 19:40:53 GMT",
"version": "v1"
}
] | 2011-12-08 | [
[
"Wu",
"Chun-Hsien",
""
],
[
"Hsiang",
"Jen-Tsung",
""
],
[
"Ford",
"L. H.",
""
],
[
"Ng",
"Kin-Wang",
""
]
] | We consider the effects of the quantum stress tensor fluctuations of a conformal field in generating gravity waves in inflationary models. We find a non-scale invariant, non-Gaussian contribution which depends upon the total expansion factor between an initial time and the end of inflation. This spectrum of gravity wav... |
1505.03553 | Edward Anderson | Edward Anderson | 'Shape Dynamics': Foundations Reassessed | 5 pages. One counter-point and one counter-counter-point added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | `Shape dynamics' is meant here in the sense of a type of conformogeometrical
reformulation of GR, some of which have of late been considered as
generalizations of or alternatives to GR. This note concerns in particular
cases based on the notion of volume-preserving conformal transformations
(VPCTs), in the sense of p... | [
{
"created": "Wed, 13 May 2015 21:08:23 GMT",
"version": "v1"
},
{
"created": "Sun, 17 May 2015 17:06:39 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Apr 2016 03:45:10 GMT",
"version": "v3"
}
] | 2016-04-22 | [
[
"Anderson",
"Edward",
""
]
] | `Shape dynamics' is meant here in the sense of a type of conformogeometrical reformulation of GR, some of which have of late been considered as generalizations of or alternatives to GR. This note concerns in particular cases based on the notion of volume-preserving conformal transformations (VPCTs), in the sense of pre... |
2112.10159 | Tanmoy Paul | Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul | Barrow entropic dark energy: A member of generalized holographic dark
energy family | PLB accepted. arXiv admin note: text overlap with arXiv:2105.08438 | null | 10.1016/j.physletb.2021.136844 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic cut-off, in the formalism of generalized holographic dark
energy (HDE), is generalized to depend on $L_\mathrm{IR} = L_\mathrm{IR} \left(
L_\mathrm{p}, \dot L_\mathrm{p}, \ddot L_\mathrm{p}, \cdots, L_\mathrm{f}, \dot
L_\mathrm{f}, \cdots, a\right)$, where $L_\mathrm{p}$ and $L_\mathrm{f}$ are
the par... | [
{
"created": "Sun, 19 Dec 2021 14:49:35 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | The holographic cut-off, in the formalism of generalized holographic dark energy (HDE), is generalized to depend on $L_\mathrm{IR} = L_\mathrm{IR} \left( L_\mathrm{p}, \dot L_\mathrm{p}, \ddot L_\mathrm{p}, \cdots, L_\mathrm{f}, \dot L_\mathrm{f}, \cdots, a\right)$, where $L_\mathrm{p}$ and $L_\mathrm{f}$ are the parti... |
gr-qc/0101009 | Don N. Page | Don N. Page | Black Hole Configurations with Total Entropy Less than A/4 | 31 pages, LaTeX | null | 10.1103/PhysRevD.65.024017 | Alberta-Thy-10-00 | gr-qc astro-ph hep-th | null | If one surrounds a black hole with a perfectly reflecting shell and
adiabatically squeezes the shell inward, one can increase the black hole area A
to exceed four times the total entropy S, which stays fixed during the process.
A can be made to exceed 4S by a factor of order unity before the one enters the
Planck reg... | [
{
"created": "Mon, 1 Jan 2001 00:27:28 GMT",
"version": "v1"
}
] | 2013-05-29 | [
[
"Page",
"Don N.",
""
]
] | If one surrounds a black hole with a perfectly reflecting shell and adiabatically squeezes the shell inward, one can increase the black hole area A to exceed four times the total entropy S, which stays fixed during the process. A can be made to exceed 4S by a factor of order unity before the one enters the Planck regim... |
0708.1398 | Chris Clarkson | Chris Clarkson (Cape Town) | A covariant approach for perturbations of rotationally symmetric
spacetimes | 13 pages | Phys.Rev.D76:104034,2007 | 10.1103/PhysRevD.76.104034 | null | gr-qc | null | We present a covariant decomposition of Einstein's Field Equations which is
particularly suitable for perturbations of spherically symmetric -- and general
locally rotationally symmetric -- spacetimes. Based upon the utility of the 1+3
covariant approach to perturbation theory in cosmology, the semi-tetrad, 1+1+2
app... | [
{
"created": "Fri, 10 Aug 2007 10:41:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Clarkson",
"Chris",
"",
"Cape Town"
]
] | We present a covariant decomposition of Einstein's Field Equations which is particularly suitable for perturbations of spherically symmetric -- and general locally rotationally symmetric -- spacetimes. Based upon the utility of the 1+3 covariant approach to perturbation theory in cosmology, the semi-tetrad, 1+1+2 appro... |
2406.04471 | Patryk Mach | Adam Cie\'slik, Patryk Mach, Andrzej Odrzywolek | Monte Carlo methods for stationary solutions of general-relativistic
Vlasov systems: Planar accretion onto a moving Schwarzschild black hole | 33 pages, 13 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform Monte Carlo simulations of stationary planar accretion of a
collisionless gas onto a moving Schwarzschild black hole. In this work -- a
sequel to our previous paper on the Monte Carlo method for stationary
general-relativistic Vlasov systems -- we demonstrate that our approach can be
extended beyond the si... | [
{
"created": "Thu, 6 Jun 2024 19:52:11 GMT",
"version": "v1"
}
] | 2024-06-10 | [
[
"Cieślik",
"Adam",
""
],
[
"Mach",
"Patryk",
""
],
[
"Odrzywolek",
"Andrzej",
""
]
] | We perform Monte Carlo simulations of stationary planar accretion of a collisionless gas onto a moving Schwarzschild black hole. In this work -- a sequel to our previous paper on the Monte Carlo method for stationary general-relativistic Vlasov systems -- we demonstrate that our approach can be extended beyond the simp... |
2010.05927 | K\'evin Nguyen | Oleg Evnin, Victor Massart, Kevin Nguyen | Robustness of the Cosmological Constant Damping Mechanism Through Matter
Eras | 15 pages, 2 figures; v2: extended discussions, matches the published
version | Class.Quant.Grav. 38 (2021) 17, 175012 | 10.1088/1361-6382/ac1851 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A dynamical resolution to the cosmological constant fine-tuning problem has
been previously put forward, based on a scalar-tensor gravitational theory
possessing de Sitter attractor solutions characterized by a small Hubble
expansion rate, irrespective of an initially large vacuum energy. We show that
a technically n... | [
{
"created": "Mon, 12 Oct 2020 18:00:09 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Aug 2021 08:57:11 GMT",
"version": "v2"
}
] | 2021-08-19 | [
[
"Evnin",
"Oleg",
""
],
[
"Massart",
"Victor",
""
],
[
"Nguyen",
"Kevin",
""
]
] | A dynamical resolution to the cosmological constant fine-tuning problem has been previously put forward, based on a scalar-tensor gravitational theory possessing de Sitter attractor solutions characterized by a small Hubble expansion rate, irrespective of an initially large vacuum energy. We show that a technically nat... |
gr-qc/0005087 | Juan A. Valiente | Juan A. Valiente-Kroon | On the existence and convergence of polyhomogeneous expansions of
zero-rest-mass fields | 10 pages, 1 eps figure | Class.Quant.Grav. 17 (2000) 4365-4376 | 10.1088/0264-9381/17/21/302 | null | gr-qc | null | The convergence of polyhomogeneous expansions of zero-rest-mass fields in
asymptotically flat spacetimes is discussed. An existence proof for the
asymptotic characteristic initial value problem for a zero-rest-mass field with
polyhomogeneous initial data is given. It is shown how this non-regular problem
can be prope... | [
{
"created": "Fri, 19 May 2000 14:08:08 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Valiente-Kroon",
"Juan A.",
""
]
] | The convergence of polyhomogeneous expansions of zero-rest-mass fields in asymptotically flat spacetimes is discussed. An existence proof for the asymptotic characteristic initial value problem for a zero-rest-mass field with polyhomogeneous initial data is given. It is shown how this non-regular problem can be properl... |
1301.5859 | Wolfgang Wieland | Wolfgang M. Wieland | Hamiltonian spinfoam gravity | 28 pages, 2 figures | Class. Quant. Grav. 31 (2014) 025002 | 10.1088/0264-9381/31/2/025002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a Hamiltonian formulation of spinfoam-gravity, which
leads to a straight-forward canonical quantisation. To begin with, we derive a
continuum action adapted to the simplicial decomposition. The equations of
motion admit a Hamiltonian formulation, allowing us to perform the constraint
analysis. We ... | [
{
"created": "Thu, 24 Jan 2013 18:42:46 GMT",
"version": "v1"
}
] | 2014-02-28 | [
[
"Wieland",
"Wolfgang M.",
""
]
] | This paper presents a Hamiltonian formulation of spinfoam-gravity, which leads to a straight-forward canonical quantisation. To begin with, we derive a continuum action adapted to the simplicial decomposition. The equations of motion admit a Hamiltonian formulation, allowing us to perform the constraint analysis. We do... |
gr-qc/9701027 | James Hartle | James B. Hartle (Institute for Theoretical Physics, University of
California, Santa Barbara) | Sources of Predictability | 8pages, REVTEX 3.0, no figures, very minor corrections to text | Complexity 3:22,1997 | null | NSF-ITP-96-151, UCSBTH-96-30 | gr-qc hep-th quant-ph | null | Sources of predictability in the basic laws of physics are described in the
most general theoretical context -- the quantum theory of the universe as a
whole. (To appear in the Proceedings of the conference on Fundamental Sources
of Unpredictability held at the Santa Fe Institute, March 28 to 30, 1996 to be
published... | [
{
"created": "Mon, 13 Jan 1997 18:25:57 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Apr 1997 19:51:39 GMT",
"version": "v2"
}
] | 2011-04-15 | [
[
"Hartle",
"James B.",
"",
"Institute for Theoretical Physics, University of\n California, Santa Barbara"
]
] | Sources of predictability in the basic laws of physics are described in the most general theoretical context -- the quantum theory of the universe as a whole. (To appear in the Proceedings of the conference on Fundamental Sources of Unpredictability held at the Santa Fe Institute, March 28 to 30, 1996 to be published b... |
2304.06760 | Parampreet Singh | Meysam Motaharfar, Parampreet Singh | Quantum gravitational non-singular tunneling wavefunction proposal | Generalizes results of 2212.14065 by authors. Proceedings paper of
2nd ECU conference. 10 pages. 5 figures | Phys. Sci. Forum 2023, 7(1), 44 | 10.3390/ECU2023-14101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently shown that tunneling wavefunction proposal is consistent with
loop quantum geometry corrections including both holonomy and inverse scale
factor corrections in the gravitational part of a spatially closed isotropic
model with a positive cosmological constant. However, in presence of an
inflationary po... | [
{
"created": "Thu, 13 Apr 2023 18:03:25 GMT",
"version": "v1"
}
] | 2023-04-17 | [
[
"Motaharfar",
"Meysam",
""
],
[
"Singh",
"Parampreet",
""
]
] | It was recently shown that tunneling wavefunction proposal is consistent with loop quantum geometry corrections including both holonomy and inverse scale factor corrections in the gravitational part of a spatially closed isotropic model with a positive cosmological constant. However, in presence of an inflationary pote... |
2009.06306 | Tuan Do | Tuan Q. Do | No-go theorem for inflation in Ricci-inverse gravity | 15 pages, 2 figures. This is a minor revision, in which the title and
abstract are modified in order to express more clearly the main result of
this paper. In addition, discussions on some important results investigated
by other people are added. Some relevant references are also added. All
calculations and con... | Eur. Phys. J. C 81, 431 (2021) | 10.1140/epjc/s10052-021-09223-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a recent proposed Ricci-inverse gravity, which is a very novel type
of fourth-order gravity. In particular, we are able to figure out both
isotropically and anisotropically inflating universes to this model. More
interestingly, these solutions are free from a singularity problem. However,
stability analysis ... | [
{
"created": "Mon, 14 Sep 2020 10:15:03 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Nov 2020 04:44:21 GMT",
"version": "v2"
},
{
"created": "Mon, 10 May 2021 14:49:52 GMT",
"version": "v3"
}
] | 2021-05-20 | [
[
"Do",
"Tuan Q.",
""
]
] | We study a recent proposed Ricci-inverse gravity, which is a very novel type of fourth-order gravity. In particular, we are able to figure out both isotropically and anisotropically inflating universes to this model. More interestingly, these solutions are free from a singularity problem. However, stability analysis ba... |
1903.03423 | David Kipping | David Kipping | The Halo Drive: Fuel-Free Relativistic Propulsion of Large Masses via
Recycled Boomerang Photons | Accepted for publication. 14 pages, 5 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational slingshots around a neutron star in a compact binary have been
proposed as a means of accelerating large masses to potentially relativistic
speeds. Such a slingshot is attractive since fuel is not expended for the
acceleration, however it does entail a spacecraft diving into close proximity
of the binar... | [
{
"created": "Thu, 28 Feb 2019 17:23:23 GMT",
"version": "v1"
}
] | 2019-03-11 | [
[
"Kipping",
"David",
""
]
] | Gravitational slingshots around a neutron star in a compact binary have been proposed as a means of accelerating large masses to potentially relativistic speeds. Such a slingshot is attractive since fuel is not expended for the acceleration, however it does entail a spacecraft diving into close proximity of the binary,... |
2205.05421 | Simone Mastrogiovanni | S. Mastrogiovanni, K. Leyde, C. Karathanasis, E. Chassande-Mottin,
D.A. Steer, J. Gair, A. Ghosh, R. Gray, S. Mukherjee and S. Rinaldi | Cosmology in the dark: How compact binaries formation impact the
gravitational-waves cosmological measurements | Proceeding for The European Physical Society Conference on High
Energy Physics (EPS-HEP2021), 9 pages 2 figures | null | 10.22323/1.398.0098 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Information about the mass spectrum of compact stars can be used to infer
cosmological parameters from gravitational waves (GW) in the absence of
redshift measurements obtained from electromagnetic (EM) observations. This
method will be fundamental in measuring and testing cosmology with GWs for
current and future gr... | [
{
"created": "Wed, 11 May 2022 11:43:13 GMT",
"version": "v1"
}
] | 2022-09-21 | [
[
"Mastrogiovanni",
"S.",
""
],
[
"Leyde",
"K.",
""
],
[
"Karathanasis",
"C.",
""
],
[
"Chassande-Mottin",
"E.",
""
],
[
"Steer",
"D. A.",
""
],
[
"Gair",
"J.",
""
],
[
"Ghosh",
"A.",
""
],
[
"Gray",
... | Information about the mass spectrum of compact stars can be used to infer cosmological parameters from gravitational waves (GW) in the absence of redshift measurements obtained from electromagnetic (EM) observations. This method will be fundamental in measuring and testing cosmology with GWs for current and future grou... |
0805.3703 | Mauricio Bellini | Federico Agustin Membiela, Mauricio Bellini (Mar del Plata University
& CONICET) | Dark energy from gravitoelectromagnetic inflation? | Final version, to be published in Il Nuovo Cimento B | Nuovo Cim.B123:241-245,2008 | 10.1393/ncb/i2008-10535-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitoectromagnetic Inflation (GI) was introduced to describe in an unified
manner, electromagnetic, gravitatory and inflaton fields from a 5D vacuum
state. On the other hand, the primordial origin and evolution of dark energy is
today unknown. In this letter we show using GI that the zero modes of some
redefined ve... | [
{
"created": "Fri, 23 May 2008 20:09:50 GMT",
"version": "v1"
},
{
"created": "Tue, 27 May 2008 00:15:19 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Jul 2008 22:14:24 GMT",
"version": "v3"
}
] | 2014-11-18 | [
[
"Membiela",
"Federico Agustin",
"",
"Mar del Plata University\n & CONICET"
],
[
"Bellini",
"Mauricio",
"",
"Mar del Plata University\n & CONICET"
]
] | Gravitoectromagnetic Inflation (GI) was introduced to describe in an unified manner, electromagnetic, gravitatory and inflaton fields from a 5D vacuum state. On the other hand, the primordial origin and evolution of dark energy is today unknown. In this letter we show using GI that the zero modes of some redefined vect... |
1511.03520 | Jorge P\'aramos | O. Bertolami, V. Bessa and J. P\'aramos | Inflation with a massive vector field nonminimally coupled to gravity | 7 pages, 3 Figures | Phys. Rev. D 93, 064002 (2016) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the possibility that inflation is driven by a massive vector field
with SO(3) global symmetry nonminimally coupled to gravity. From an
E^3-invariant Robertson-Walker metric we propose an Ansatz for the vector
field, allowing us to study the evolution of the system. We study the behaviour
of the equations of ... | [
{
"created": "Wed, 11 Nov 2015 14:49:38 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2016 21:01:57 GMT",
"version": "v2"
}
] | 2016-05-09 | [
[
"Bertolami",
"O.",
""
],
[
"Bessa",
"V.",
""
],
[
"Páramos",
"J.",
""
]
] | We study the possibility that inflation is driven by a massive vector field with SO(3) global symmetry nonminimally coupled to gravity. From an E^3-invariant Robertson-Walker metric we propose an Ansatz for the vector field, allowing us to study the evolution of the system. We study the behaviour of the equations of mo... |
0806.1913 | Pouria Pedram | Pouria Pedram | Quantum Stephani Universe in vicinity of the symmetry center | 22 pages, 19 figures, to appear in JCAP | JCAP 0807:006,2008 | 10.1088/1475-7516/2008/07/006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a class of spherically symmetric Stephani cosmological models in the
presence of a self-interacting scalar field in both classical and quantum
domains. We discuss the construction of `canonical' wave packets resulting from
the solutions of a class of Wheeler-DeWitt equations in the Stephani Universe.
We sugg... | [
{
"created": "Wed, 11 Jun 2008 17:14:42 GMT",
"version": "v1"
}
] | 2010-11-30 | [
[
"Pedram",
"Pouria",
""
]
] | We study a class of spherically symmetric Stephani cosmological models in the presence of a self-interacting scalar field in both classical and quantum domains. We discuss the construction of `canonical' wave packets resulting from the solutions of a class of Wheeler-DeWitt equations in the Stephani Universe. We sugges... |
0809.4762 | Xin Li | Zhe Chang and Xin Li | Ultra-high energy cosmic rays threshold in Randers-Finsler space | null | null | 10.1088/1674-1137/33/8/005 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Kinematics in Finsler space is used to study the propagation of ultra high
energy cosmic rays particles through the cosmic microwave background radiation.
We find that the GZK threshold is lifted dramatically in Randers-Finsler space.
A tiny deformation of spacetime from Minkowskian to Finslerian allows more
ultra-hi... | [
{
"created": "Sat, 27 Sep 2008 11:07:25 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Chang",
"Zhe",
""
],
[
"Li",
"Xin",
""
]
] | Kinematics in Finsler space is used to study the propagation of ultra high energy cosmic rays particles through the cosmic microwave background radiation. We find that the GZK threshold is lifted dramatically in Randers-Finsler space. A tiny deformation of spacetime from Minkowskian to Finslerian allows more ultra-high... |
1403.7789 | Leonardo Castaneda | Hector J. Hortua and Leonardo Casta\~neda | Contrasting formulations of cosmological perturbations in a magnetic
FLRW cosmology | 18 pages. v2: Journal version | Class. Quantum Grav. 32(2015) 235026 | 10.1088/0264-9381/32/23/235026 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we contrasted two cosmological perturbation theory formalisms,
the 1+3 covariant gauge invariant and the gauge invariant by comparing their
gauge invariant variables associated with magnetic field defined in each
approach. In the first part we give an introduction to each formalism assuming
the presence... | [
{
"created": "Sun, 30 Mar 2014 17:31:15 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Nov 2015 17:16:32 GMT",
"version": "v2"
}
] | 2015-11-20 | [
[
"Hortua",
"Hector J.",
""
],
[
"Castañeda",
"Leonardo",
""
]
] | In this paper we contrasted two cosmological perturbation theory formalisms, the 1+3 covariant gauge invariant and the gauge invariant by comparing their gauge invariant variables associated with magnetic field defined in each approach. In the first part we give an introduction to each formalism assuming the presence o... |
gr-qc/0406123 | Andreas Freise | A. Freise (for the VIRGO Collaboration) | Status of VIRGO | 12 pages | Class.Quant.Grav.22:S869-S880,2005 | 10.1088/0264-9381/22/18/S01 | null | gr-qc | null | The French-Italian interferometric gravitational wave detector VIRGO is
currently being commissioned. Its principal instrument is a Michelson
interferometer with 3 km long optical cavities in the arms and a
power-recycling mirror. This paper gives an overview of the present status of
the system. We report on the pres... | [
{
"created": "Wed, 30 Jun 2004 15:20:55 GMT",
"version": "v1"
}
] | 2019-08-14 | [
[
"Freise",
"A.",
"",
"for the VIRGO Collaboration"
]
] | The French-Italian interferometric gravitational wave detector VIRGO is currently being commissioned. Its principal instrument is a Michelson interferometer with 3 km long optical cavities in the arms and a power-recycling mirror. This paper gives an overview of the present status of the system. We report on the presen... |
2106.10790 | Dong-han Yeom | Dong-han Yeom | Fuzzy instantons in landscape and swampland: review of the
Hartle-Hawking wave function and several applications | 22 pages, 9 figures; Invited review for Universe | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The Euclidean path integral is well approximated by instantons. If instantons
are dynamical, then instantons are necessarily complexified. These fuzzy
instantons can have various physical applications. In slow-roll inflation
models, fuzzy instantons can explain the probability distribution of the
initial conditions o... | [
{
"created": "Mon, 21 Jun 2021 01:07:21 GMT",
"version": "v1"
}
] | 2021-06-22 | [
[
"Yeom",
"Dong-han",
""
]
] | The Euclidean path integral is well approximated by instantons. If instantons are dynamical, then instantons are necessarily complexified. These fuzzy instantons can have various physical applications. In slow-roll inflation models, fuzzy instantons can explain the probability distribution of the initial conditions of ... |
gr-qc/9411035 | Haret Rosu | H.C. Rosu | Pedestrian notes on quantum mechanics | 15pp, twocolumn | Metaphysical Review 3 (1 May 1997) 8-22 | null | null | gr-qc quant-ph | null | I present an elementary essay on some issues related to nonrelativistic
quantum mechanics, which is written in the spirit of extreme simplicity, making
it an easy-to-read paper. Moreover, one can find a useful collection of ideas
and opinions expressed by many well-known authors in this vast research field
| [
{
"created": "Mon, 14 Nov 1994 04:04:00 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Nov 1994 01:33:00 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Apr 1995 03:30:00 GMT",
"version": "v3"
},
{
"created": "Thu, 18 May 1995 03:50:00 GMT",
"version": "v4"
},
{
"c... | 2008-02-03 | [
[
"Rosu",
"H. C.",
""
]
] | I present an elementary essay on some issues related to nonrelativistic quantum mechanics, which is written in the spirit of extreme simplicity, making it an easy-to-read paper. Moreover, one can find a useful collection of ideas and opinions expressed by many well-known authors in this vast research field |
2403.05284 | Jean Thibaut | S. Lazzarini, J. Thibaut | Gravity as a topological gauge theory | Corrected typos, improvements | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a topological gauge theory with underlying Cartan geometry $G/H$
and principal $H$-bundle. The topological action is constructed as a linear
combination of the Euler and Pontrjagin numbers coming from entries of the
curvature $\bar{\Omega}$ of a Cartan connection.
As an example we show that for $G = SO(... | [
{
"created": "Fri, 8 Mar 2024 13:06:46 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Mar 2024 09:11:41 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Jul 2024 10:36:09 GMT",
"version": "v3"
}
] | 2024-07-03 | [
[
"Lazzarini",
"S.",
""
],
[
"Thibaut",
"J.",
""
]
] | We describe a topological gauge theory with underlying Cartan geometry $G/H$ and principal $H$-bundle. The topological action is constructed as a linear combination of the Euler and Pontrjagin numbers coming from entries of the curvature $\bar{\Omega}$ of a Cartan connection. As an example we show that for $G = SO(4,1)... |
gr-qc/9604033 | Bruce Allen | Bruce Allen (University of Wisconsin - Milwaukee) | The stochastic gravity-wave background: sources and detection | 45 pages, latex w/CUP cupconf.sty macros and epsfig, 18 postscript
figures included. To appear in: Proceedings of the Les Houches School on
Astrophysical Sources of Gravitational Waves, eds. Jean-Alain Marck and
Jean-Pierre Lasota, to be published by Cambridge University Press 1996. (Note
NEW publisher). Revisi... | "Relativistic gravitation and gravitational radiation", J.-A.
Marck, J.-P. Lasota. (Proceedings, Les Houches School of Physics:
Astrophysical Sources of Gravitational Radiation), Cambridge Contemporary
Astrophysics, 1997, pages 373-417 | null | WISC-MILW-96-TH-22 | gr-qc astro-ph | null | A world-wide effort is now underway to build gravitational wave detectors
based on highly-sensitive laser interferometers. When data from detectors at
different sites is properly combined, it will permit highly-sensitive searches
for a stochastic background of relic gravitational radiation. These lectures
(from the L... | [
{
"created": "Tue, 16 Apr 1996 18:47:08 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 1996 21:14:31 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Sep 1996 22:23:11 GMT",
"version": "v3"
}
] | 2009-08-21 | [
[
"Allen",
"Bruce",
"",
"University of Wisconsin - Milwaukee"
]
] | A world-wide effort is now underway to build gravitational wave detectors based on highly-sensitive laser interferometers. When data from detectors at different sites is properly combined, it will permit highly-sensitive searches for a stochastic background of relic gravitational radiation. These lectures (from the Les... |
gr-qc/0512065 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Consistent discretizations as a road to quantum gravity | 17 Pages, Draft chapter contributed to the book "Approaches to
quantum gravity", being prepared by Daniele Oriti for Cambridge University
Press | null | null | LSU-REL-121105 | gr-qc | null | We present a brief description of the ``consistent discretization'' approach
to classical and quantum general relativity. We exhibit a classical simple
example to illustrate the approach and summarize current classical and quantum
applications. We also discuss the implications for the construction of a well
defined q... | [
{
"created": "Sun, 11 Dec 2005 21:10:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We present a brief description of the ``consistent discretization'' approach to classical and quantum general relativity. We exhibit a classical simple example to illustrate the approach and summarize current classical and quantum applications. We also discuss the implications for the construction of a well defined qua... |
gr-qc/0111014 | Dirk Puetzfeld | Dirk Puetzfeld | A cosmological model in Weyl-Cartan spacetime: I. Field equations and
solutions | 22 pages, 2 figures, uses IOP preprint style | Class.Quant.Grav. 19 (2002) 3263-3280 | 10.1088/0264-9381/19/12/310 | null | gr-qc | null | In this first article of a series on alternative cosmological models we
present an extended version of a cosmological model in Weyl-Cartan spacetime.
The new model can be viewed as a generalization of a model developed earlier
jointly with Tresguerres. Within this model the non-Riemannian quantities, i.e.
torsion $T^... | [
{
"created": "Mon, 5 Nov 2001 15:52:29 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Dec 2002 10:31:42 GMT",
"version": "v2"
}
] | 2009-04-03 | [
[
"Puetzfeld",
"Dirk",
""
]
] | In this first article of a series on alternative cosmological models we present an extended version of a cosmological model in Weyl-Cartan spacetime. The new model can be viewed as a generalization of a model developed earlier jointly with Tresguerres. Within this model the non-Riemannian quantities, i.e. torsion $T^{\... |
2405.05963 | Eleni-Alexandra Kontou | Eleni-Alexandra Kontou | Wormhole restrictions from quantum energy inequalities | 28 pages, 3 figures | null | 10.3390/universe10070291 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wormhole solutions, bridges that connect different parts of spacetime, were
proposed early in the history of General Relativity. Soon after, it was shown
that all wormholes violate classical energy conditions, which are
non-negativity constraints on contractions of the stress-energy tensor. Since
these conditions are... | [
{
"created": "Thu, 9 May 2024 17:58:40 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 2024 11:50:33 GMT",
"version": "v2"
}
] | 2024-07-09 | [
[
"Kontou",
"Eleni-Alexandra",
""
]
] | Wormhole solutions, bridges that connect different parts of spacetime, were proposed early in the history of General Relativity. Soon after, it was shown that all wormholes violate classical energy conditions, which are non-negativity constraints on contractions of the stress-energy tensor. Since these conditions are v... |
1909.08724 | James B. Hartle | James B. Hartle | How Nature is Conformable to Herself: A View from Quantum Cosmology | 15 pages, revtex4 | null | null | null | gr-qc hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In his essay "Nature Conformable to Herself" the late Murray Gell-Mann
expands on an observation of Newton that theories of seemingly disparate
phenomena in the universe often make use of similar ideas and similar
mathematical structure. Newton summarized that by saying that nature was very
consonant and conformable ... | [
{
"created": "Wed, 18 Sep 2019 22:13:33 GMT",
"version": "v1"
}
] | 2019-09-20 | [
[
"Hartle",
"James B.",
""
]
] | In his essay "Nature Conformable to Herself" the late Murray Gell-Mann expands on an observation of Newton that theories of seemingly disparate phenomena in the universe often make use of similar ideas and similar mathematical structure. Newton summarized that by saying that nature was very consonant and conformable to... |
2003.07016 | Michael Good | Michael R.R. Good | Extreme Hawking Radiation | 11 pages, 12 figures | Phys. Rev. D 101, 104050 (2020) | 10.1103/PhysRevD.101.104050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modeling the collapse of an extreme Reissner-Nordstr\"om (ERN) black hole by
solving the corresponding moving mirror model for the trajectory that
asymptotically approaches uniform acceleration, we obtain the non-zero beta
coefficients for all times. Finite energy is emitted, the radiation spectra is
non-thermal (non... | [
{
"created": "Mon, 16 Mar 2020 04:21:37 GMT",
"version": "v1"
}
] | 2020-05-28 | [
[
"Good",
"Michael R. R.",
""
]
] | Modeling the collapse of an extreme Reissner-Nordstr\"om (ERN) black hole by solving the corresponding moving mirror model for the trajectory that asymptotically approaches uniform acceleration, we obtain the non-zero beta coefficients for all times. Finite energy is emitted, the radiation spectra is non-thermal (non-s... |
1908.05756 | Andrea Dapor | Mehdi Assanioussi, Andrea Dapor, Klaus Liegener | Perspectives on the dynamics in a loop quantum gravity effective
description of black hole interiors | 13 pages, 2 figures; revised version accepted for publication in
Phys. Rev. D | Phys. Rev. D 101, 026002 (2020) | 10.1103/PhysRevD.101.026002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the loop quantum gravity context, there have been numerous proposals to
quantize the reduced phase space of a black hole, and develop a classical
effective description for its interior which eventually resolves the
singularity. However, little progress has been made towards understanding the
relation between such ... | [
{
"created": "Thu, 15 Aug 2019 21:01:25 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Dec 2019 22:40:32 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Assanioussi",
"Mehdi",
""
],
[
"Dapor",
"Andrea",
""
],
[
"Liegener",
"Klaus",
""
]
] | In the loop quantum gravity context, there have been numerous proposals to quantize the reduced phase space of a black hole, and develop a classical effective description for its interior which eventually resolves the singularity. However, little progress has been made towards understanding the relation between such qu... |
gr-qc/9706072 | Wang Anzhong | Anzhong Wang and Jose A.C. Nogales | Instability of cosmological event horizons of non-static global cosmic
strings | Latex, no figures | Phys.Rev.D56:6217-6224,1997 | 10.1103/PhysRevD.56.6217 | null | gr-qc | null | The stability of the cosmological event horizons found recently by Gregory
[Phys. Rev. D54, 4955 (1996)] for a class of non-static global cosmic strings
is studied. It is shown that they are not stable to both test particles and
physical perturbations. In particular, the back reaction of the perturbations
of null dus... | [
{
"created": "Mon, 23 Jun 1997 20:10:40 GMT",
"version": "v1"
}
] | 2009-07-07 | [
[
"Wang",
"Anzhong",
""
],
[
"Nogales",
"Jose A. C.",
""
]
] | The stability of the cosmological event horizons found recently by Gregory [Phys. Rev. D54, 4955 (1996)] for a class of non-static global cosmic strings is studied. It is shown that they are not stable to both test particles and physical perturbations. In particular, the back reaction of the perturbations of null dust ... |
gr-qc/0108030 | Jose Socorro Garcia Diaz | J. Socorro and Octavio Cornejo Perez | Family of solutions for axisymmetric electrovacuum Einstein-Maxwell
field equations | 12 pages, Revtex | null | null | IFUG-01-26 | gr-qc | null | We present a family of solutions for the axisymmetric Plebanski-Demianski
metric and other corresponding reduced metrics. We also present the black hole
characteristics using a new set of parameters for Kerr-Newman metric.
| [
{
"created": "Thu, 9 Aug 2001 15:54:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Socorro",
"J.",
""
],
[
"Perez",
"Octavio Cornejo",
""
]
] | We present a family of solutions for the axisymmetric Plebanski-Demianski metric and other corresponding reduced metrics. We also present the black hole characteristics using a new set of parameters for Kerr-Newman metric. |
0808.0295 | Max Chaves | M. Chaves | Renormalization of a modified gravity with a quadratic Riemann tensor
term | 10 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a modified form of gravity, which has an extra term quadratic in
the Riemann tensor. This term mimics a Yang-Mills theory. The other defining
characteristic of this gravity is having the affine connection independent of
the metric. (The metricity of the metric is rejected, too, since it implies a
Levi-Civ... | [
{
"created": "Sun, 3 Aug 2008 04:01:54 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Aug 2008 16:19:17 GMT",
"version": "v2"
}
] | 2008-08-05 | [
[
"Chaves",
"M.",
""
]
] | We consider a modified form of gravity, which has an extra term quadratic in the Riemann tensor. This term mimics a Yang-Mills theory. The other defining characteristic of this gravity is having the affine connection independent of the metric. (The metricity of the metric is rejected, too, since it implies a Levi-Civit... |
gr-qc/0203001 | Steven Carlip | S. Carlip | Near-Horizon Conformal Symmetry and Black Hole Entropy | 10 pages, one figure (with LaTeX picture environment) | Phys.Rev.Lett.88:241301,2002 | 10.1103/PhysRevLett.88.241301 | UCD-02-02 | gr-qc hep-th | null | Near an event horizon, the action of general relativity acquires a new
asymptotic conformal symmetry. Using two-dimensional dilaton gravity as a test
case, I show that this symmetry results in a chiral Virasoro algebra with a
calculable classical central charge, and that Cardy's formula for the density
of states repr... | [
{
"created": "Fri, 1 Mar 2002 19:31:13 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
]
] | Near an event horizon, the action of general relativity acquires a new asymptotic conformal symmetry. Using two-dimensional dilaton gravity as a test case, I show that this symmetry results in a chiral Virasoro algebra with a calculable classical central charge, and that Cardy's formula for the density of states reprod... |
0810.2404 | Michael Heller | Michael Heller, Leszek Pysiak, Wieslaw Sasin | General Relativity on Random Operators | 17 LaTex pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a mathematical structure which unifies mathematical structures of
general relativity and quantum mechanics. It consists of the noncommutative
algebra of compactly supported, complex valued functions ${\mathcal A}$, with
convolution as multiplication, on a groupoid $\Gamma $ the base of which is the
total s... | [
{
"created": "Tue, 14 Oct 2008 09:59:52 GMT",
"version": "v1"
}
] | 2008-10-15 | [
[
"Heller",
"Michael",
""
],
[
"Pysiak",
"Leszek",
""
],
[
"Sasin",
"Wieslaw",
""
]
] | We present a mathematical structure which unifies mathematical structures of general relativity and quantum mechanics. It consists of the noncommutative algebra of compactly supported, complex valued functions ${\mathcal A}$, with convolution as multiplication, on a groupoid $\Gamma $ the base of which is the total spa... |
gr-qc/9803024 | Carlo Rovelli | Carlo Rovelli | Strings, loops and others: a critical survey of the present approaches
to quantum gravity | Plenary lecture on quantum gravity at the GR15 conference, Pune,
India | null | null | null | gr-qc hep-th | null | I review the present theoretical attempts to understand the quantum
properties of spacetime. In particular, I illustrate the main achievements and
the main difficulties in: string theory, loop quantum gravity, discrete quantum
gravity (Regge calculus, dynamical triangulations and simplicial models),
Euclidean quantum... | [
{
"created": "Thu, 5 Mar 1998 16:14:36 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Mar 1998 00:11:55 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Apr 1998 00:55:53 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Rovelli",
"Carlo",
""
]
] | I review the present theoretical attempts to understand the quantum properties of spacetime. In particular, I illustrate the main achievements and the main difficulties in: string theory, loop quantum gravity, discrete quantum gravity (Regge calculus, dynamical triangulations and simplicial models), Euclidean quantum g... |
1901.03971 | Tzvi Scarr | Tzvi Scarr | Synchronization in Uniformly Accelerated Frames | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a system is uniformly accelerated if and only if all of the
clocks in the system can be synchronized to each other, and the clocks will
remain synchronized as long as the acceleration remains uniform. In particular,
it is possible to synchronize clocks on a disk rotating with constant angular
velocity. C... | [
{
"created": "Sat, 5 Jan 2019 18:41:45 GMT",
"version": "v1"
}
] | 2019-01-15 | [
[
"Scarr",
"Tzvi",
""
]
] | We show that a system is uniformly accelerated if and only if all of the clocks in the system can be synchronized to each other, and the clocks will remain synchronized as long as the acceleration remains uniform. In particular, it is possible to synchronize clocks on a disk rotating with constant angular velocity. Con... |
0911.1919 | S Habib Mazharimousavi | S. Habib Mazharimousavi, O. Gurtug and M. Halilsoy | Theorem to generate Einstein-Non Linear Maxwell Fields | 20 pages, 4 figures | Class.Quant.Grav.27:205022,2010 | 10.1088/0264-9381/27/20/205022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a theorem in d-dimensional static, spherically symmetric spacetime
in generic Lovelock gravity coupled with a non-linear electrodynamic source to
generate solutions. The theorem states that irrespective of the order of the
Lovelock gravity and non-linear Maxwell (NLM) Lagrangian, for the pure electric
fiel... | [
{
"created": "Tue, 10 Nov 2009 14:49:08 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Dec 2009 13:13:06 GMT",
"version": "v2"
},
{
"created": "Tue, 25 May 2010 14:04:28 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Gurtug",
"O.",
""
],
[
"Halilsoy",
"M.",
""
]
] | We present a theorem in d-dimensional static, spherically symmetric spacetime in generic Lovelock gravity coupled with a non-linear electrodynamic source to generate solutions. The theorem states that irrespective of the order of the Lovelock gravity and non-linear Maxwell (NLM) Lagrangian, for the pure electric field ... |
gr-qc/9908055 | Massimo Giovannini | Massimo Giovannini (Tufts University, Institute of Cosmology) | Backgrounds of squeezed relic photons and their spatial correlations | 9 pages in LaTex style | Phys.Rev. D61 (2000) 087306 | 10.1103/PhysRevD.61.087306 | TUPT-08-99 | gr-qc | null | We discuss the production of multi-photons squeezed states induced by the
time variation of the (Abelian) gauge coupling constant in a string
cosmological context. Within a fully quantum mechanical approach we solve the
time evolution of the mean number of produced photons in terms of the squeezing
parameters and in ... | [
{
"created": "Thu, 19 Aug 1999 20:36:52 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Giovannini",
"Massimo",
"",
"Tufts University, Institute of Cosmology"
]
] | We discuss the production of multi-photons squeezed states induced by the time variation of the (Abelian) gauge coupling constant in a string cosmological context. Within a fully quantum mechanical approach we solve the time evolution of the mean number of produced photons in terms of the squeezing parameters and in te... |
1710.01881 | Xuefeng Zhang | Xuefeng Zhang, Zhoujian Cao | Long-Term Postmerger Simulations of Binary Neutron Star Coalescence:
Formation of Toroidal Remnants and Gravitational Wave Afterglow | 26 pages, 11 figures | null | 10.1142/S0218271819500263 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been estimated that a significant proportion of binary neutron star
merger events produce long-lived massive remnants supported by differential
rotation and subject to rotational instabilities. To examine formation and
oscillation of rapidly rotating neutron stars (NS) after merger, we present an
exploratory s... | [
{
"created": "Thu, 5 Oct 2017 04:43:17 GMT",
"version": "v1"
}
] | 2018-10-08 | [
[
"Zhang",
"Xuefeng",
""
],
[
"Cao",
"Zhoujian",
""
]
] | It has been estimated that a significant proportion of binary neutron star merger events produce long-lived massive remnants supported by differential rotation and subject to rotational instabilities. To examine formation and oscillation of rapidly rotating neutron stars (NS) after merger, we present an exploratory stu... |
1009.1005 | Fabio Duvan Lora Clavijo Mr. | F. D. Lora-Clavijo, P. A. Ospina-Henao and J. F. Pedraza | Charged Annular Disks and Reissner-Nordstr\"{o}m Type Black Holes from
Extremal Dust | 17 revtex pages, 8 eps figures | Phys.Rev.D82:084005,2010 | 10.1103/PhysRevD.82.084005 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first analytical superposition of a charged black hole with an
annular disk of extremal dust. In order to obtain the solutions, we first solve
the Einstein-Maxwell field equations for sources that represent disk-like
configurations of matter in confomastatic spacetimes by assuming a functional
dependen... | [
{
"created": "Mon, 6 Sep 2010 09:51:11 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Oct 2010 19:15:54 GMT",
"version": "v2"
}
] | 2010-10-07 | [
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Ospina-Henao",
"P. A.",
""
],
[
"Pedraza",
"J. F.",
""
]
] | We present the first analytical superposition of a charged black hole with an annular disk of extremal dust. In order to obtain the solutions, we first solve the Einstein-Maxwell field equations for sources that represent disk-like configurations of matter in confomastatic spacetimes by assuming a functional dependence... |
1007.4572 | Frank Tipler | Maurice J. Dupre and Frank J. Tipler | General Relativity As an Aether Theory | null | null | 10.1142/S0218271812500113 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most early twentieth century relativists --- Lorentz, Einstein, Eddington,
for examples --- claimed that general relativity was merely a theory of the
aether. We shall confirm this claim by deriving the Einstein equations using
aether theory. We shall use a combination of Lorentz's and Kelvin's conception
of the aeth... | [
{
"created": "Mon, 26 Jul 2010 21:09:16 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Dupre",
"Maurice J.",
""
],
[
"Tipler",
"Frank J.",
""
]
] | Most early twentieth century relativists --- Lorentz, Einstein, Eddington, for examples --- claimed that general relativity was merely a theory of the aether. We shall confirm this claim by deriving the Einstein equations using aether theory. We shall use a combination of Lorentz's and Kelvin's conception of the aether... |
0908.2689 | Lorenzo Iorio | Lorenzo Iorio | Galactic Sun's motion in the Cold Dark Matter, MOdified Newtonian
Dynamics and MOdified Gravity scenarios | LaTex2e, 6 pages, 3 figures, 7 tables | Astron. Nachr.330:861-866, 2009 | 10.1002/asna.200911239 | null | gr-qc astro-ph.GA physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically integrate the equations of motion of the Sun in Galactocentric
Cartesian rectangular coordinates for -4.5 Gyr <= t <= 0 in Newtonian mechanics
with two different models for the Cold Dark Matter (CDM) halo, in MOdified
Newtonian Dynamics (MOND) and in MOdified Gravity (MOG) without resorting to
CDM. The... | [
{
"created": "Wed, 19 Aug 2009 14:38:30 GMT",
"version": "v1"
}
] | 2009-11-09 | [
[
"Iorio",
"Lorenzo",
""
]
] | We numerically integrate the equations of motion of the Sun in Galactocentric Cartesian rectangular coordinates for -4.5 Gyr <= t <= 0 in Newtonian mechanics with two different models for the Cold Dark Matter (CDM) halo, in MOdified Newtonian Dynamics (MOND) and in MOdified Gravity (MOG) without resorting to CDM. The i... |
2208.09041 | Mohammad Vahid Takook | R. Raziani and M.V. Takook | Polarization tensor in de Sitter gauge gravity | 11 pages, typos corrected | Int. J. Mod. Phys. D 30 (2021) 2150035 | 10.1142/S0218271821500358 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The gauge theory of the de Sitter group, SO$(1,4)$, in the ambient space
formalism has been considered in this article. This method is essential to
constructing the de Sitter super-conformal gravity and Quantum gravity. $10$
gauge vector fields are needed, corresponding to $10$ generators of the de
Sitter group. Usin... | [
{
"created": "Thu, 18 Aug 2022 19:47:46 GMT",
"version": "v1"
}
] | 2022-08-24 | [
[
"Raziani",
"R.",
""
],
[
"Takook",
"M. V.",
""
]
] | The gauge theory of the de Sitter group, SO$(1,4)$, in the ambient space formalism has been considered in this article. This method is essential to constructing the de Sitter super-conformal gravity and Quantum gravity. $10$ gauge vector fields are needed, corresponding to $10$ generators of the de Sitter group. Using ... |
2401.11220 | Malay K. Nandy | Nihar Ranjan Ghosh and Malay K. Nandy | Mass Superinflation from Enhanced Cauchy Horizon Singularity in a
Reissner-Nordstr\"om Black Hole | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Ever since Penrose and Simpson contradicted Novikov's prediction that an
infalling passenger would emerge into an asymptotically flat universe, there
have been a continued interest in predicting the nature of singularity at the
Cauchy horizon of a Reissner-Nordstrom blackhole. This prediction was first
confirmed by P... | [
{
"created": "Sat, 20 Jan 2024 12:27:08 GMT",
"version": "v1"
}
] | 2024-01-23 | [
[
"Ghosh",
"Nihar Ranjan",
""
],
[
"Nandy",
"Malay K.",
""
]
] | Ever since Penrose and Simpson contradicted Novikov's prediction that an infalling passenger would emerge into an asymptotically flat universe, there have been a continued interest in predicting the nature of singularity at the Cauchy horizon of a Reissner-Nordstrom blackhole. This prediction was first confirmed by Poi... |
gr-qc/0005106 | Joachim Almergren | S. Sonego, J. Almergren, M. Abramowicz | Optical geometry for gravitational collapse and Hawking radiation | 13 pages, 10 figures, aps, revtex, To be published in PRD | Phys.Rev.D62:064010,2000 | 10.1103/PhysRevD.62.064010 | null | gr-qc | null | The notion of optical geometry, introduced more than twenty years ago as a
formal tool in quantum field theory on a static background, has recently found
several applications to the study of physical processes around compact objects.
In this paper we define optical geometry for spherically symmetric
gravitational col... | [
{
"created": "Wed, 24 May 2000 11:38:45 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sonego",
"S.",
""
],
[
"Almergren",
"J.",
""
],
[
"Abramowicz",
"M.",
""
]
] | The notion of optical geometry, introduced more than twenty years ago as a formal tool in quantum field theory on a static background, has recently found several applications to the study of physical processes around compact objects. In this paper we define optical geometry for spherically symmetric gravitational colla... |
1910.03565 | Jose Luis Bl\'azquez-Salcedo | Jose Luis Bl\'azquez-Salcedo, Christian Knoll | Constructing spherically symmetric Einstein-Dirac systems with multiple
spinors: Ansatz, wormholes and other analytical solutions | 17 pages, 4 figures; v2 matches published version | EPJC 80, 174 (2020) | 10.1140/epjc/s10052-020-7706-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a detailed calculation of an Ansatz that allows to
obtain spherically symmetric Einstein-Dirac configurations in $d$-dimensions.
We show that this is possible by combining $2^{\lfloor \frac{d-2}{2} \rfloor}$
Dirac fields, making use of the properties of the angular dependence of the
spinors i... | [
{
"created": "Tue, 8 Oct 2019 17:52:39 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Feb 2020 11:34:40 GMT",
"version": "v2"
}
] | 2020-02-26 | [
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Knoll",
"Christian",
""
]
] | In this paper we present a detailed calculation of an Ansatz that allows to obtain spherically symmetric Einstein-Dirac configurations in $d$-dimensions. We show that this is possible by combining $2^{\lfloor \frac{d-2}{2} \rfloor}$ Dirac fields, making use of the properties of the angular dependence of the spinors in ... |
2207.08086 | Abhijit Chakraborty | Abhijit Chakraborty, Horacio Camblong, Carlos Ordonez | Thermal effect in a causal diamond: open quantum systems approach | 25 pages, 5 figures | null | 10.1103/PhysRevD.106.045027 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | A static observer with a finite lifetime has causal access to only a limited
region of spacetime known as the causal diamond. The presence of an apparent
horizon in the causal diamond, due to the observer's finite lifetime, is the
origin of an Unruh-like thermal effect. Thus, even though the observer is
static and th... | [
{
"created": "Sun, 17 Jul 2022 06:42:42 GMT",
"version": "v1"
}
] | 2022-09-14 | [
[
"Chakraborty",
"Abhijit",
""
],
[
"Camblong",
"Horacio",
""
],
[
"Ordonez",
"Carlos",
""
]
] | A static observer with a finite lifetime has causal access to only a limited region of spacetime known as the causal diamond. The presence of an apparent horizon in the causal diamond, due to the observer's finite lifetime, is the origin of an Unruh-like thermal effect. Thus, even though the observer is static and the ... |
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