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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2310.18594 | Umananda Dev Goswami | Ronit Karmakar and Umananda Dev Goswami | Quasinormal modes, temperatures and greybody factors of black holes in a
generalized Rastall gravity theory | 19 pages, 15 figures; Published version | Phys. Scr. 99 (2024) 055003 | 10.1088/1402-4896/ad350e | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We introduce a modification in the energy-momentum conservation violating
Rastall's theory of gravity and obtain a Reissner-Nordstr\"om-type black hole
solution in spacetime surrounded by a cloud of strings and charge fields. We
examine the horizons of the black hole along with the influence of the
parameters of the ... | [
{
"created": "Sat, 28 Oct 2023 05:10:39 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Dec 2023 03:32:56 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Apr 2024 10:40:29 GMT",
"version": "v3"
}
] | 2024-04-11 | [
[
"Karmakar",
"Ronit",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We introduce a modification in the energy-momentum conservation violating Rastall's theory of gravity and obtain a Reissner-Nordstr\"om-type black hole solution in spacetime surrounded by a cloud of strings and charge fields. We examine the horizons of the black hole along with the influence of the parameters of the mo... |
gr-qc/9802015 | Ruth A. W. Gregory | Owen Dando and Ruth Gregory | Dilatonic global strings | 18 pages RevTeX, 3 figures, references amended | Phys. Rev. D 58, 023502 (1998) | 10.1103/PhysRevD.58.023502 | DTP/98/1 | gr-qc astro-ph hep-th | null | We examine the field equations of a self-gravitating global string in low
energy superstring gravity, allowing for an arbitrary coupling of the global
string to the dilaton. Massive and massless dilatons are considered. For the
massive dilaton the spacetime is similar to the recently discovered
non-singular time-depe... | [
{
"created": "Fri, 6 Feb 1998 15:21:54 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Feb 1998 17:23:37 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Dando",
"Owen",
""
],
[
"Gregory",
"Ruth",
""
]
] | We examine the field equations of a self-gravitating global string in low energy superstring gravity, allowing for an arbitrary coupling of the global string to the dilaton. Massive and massless dilatons are considered. For the massive dilaton the spacetime is similar to the recently discovered non-singular time-depend... |
2010.15355 | Titus K Mathew | Jerin Mohan N D and Titus K Mathew | On the feasibility of truncated Israel-Stewart model in the context of
late acceleration | 34 pages and 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A dissipative model of the Universe based on the causal relativistic
truncated Israel-Stewart theory is analysed in the context of recent
accelerated expansion of the Universe. The bulk viscosity and relaxation time
are taken as $\xi=\alpha\rho^s$ and
$\tau=\frac{\alpha}{\epsilon\gamma(2-\gamma)}\rho^{s-1}$ respectiv... | [
{
"created": "Thu, 29 Oct 2020 05:07:28 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Aug 2021 12:42:19 GMT",
"version": "v2"
}
] | 2021-08-13 | [
[
"D",
"Jerin Mohan N",
""
],
[
"Mathew",
"Titus K",
""
]
] | A dissipative model of the Universe based on the causal relativistic truncated Israel-Stewart theory is analysed in the context of recent accelerated expansion of the Universe. The bulk viscosity and relaxation time are taken as $\xi=\alpha\rho^s$ and $\tau=\frac{\alpha}{\epsilon\gamma(2-\gamma)}\rho^{s-1}$ respectivel... |
2110.15820 | Odysse Halim | O. Halim, G. Vedovato, E. Milotti, G. A. Prodi, S. Bini, M. Drago, V.
Gayathri, C. Lazzaro, D. Lopez, A. Miani, B. O'Brien, F. Salemi, M.
Szczepanczyk, S. Tiwari, A. Virtuoso, S. Klimenko | The search of higher multipole radiation in gravitational waves from
compact binary coalescences by a minimally-modelled pipeline | 5 pages, Proceedings for the "17th International Conference on Topics
in Astroparticle and Underground Physics (TAUP)" | null | 10.1088/1742-6596/2156/1/012081 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The coherent WaveBurst (cWB) pipeline implements a minimally-modelled search
to find a coherent response in the network of gravitational wave detectors of
the LIGO-Virgo Collaboration in the time-frequency domain. In this manuscript,
we provide a timely introduction to an extension of the cWB analysis to detect
spect... | [
{
"created": "Fri, 29 Oct 2021 14:32:21 GMT",
"version": "v1"
}
] | 2022-03-02 | [
[
"Halim",
"O.",
""
],
[
"Vedovato",
"G.",
""
],
[
"Milotti",
"E.",
""
],
[
"Prodi",
"G. A.",
""
],
[
"Bini",
"S.",
""
],
[
"Drago",
"M.",
""
],
[
"Gayathri",
"V.",
""
],
[
"Lazzaro",
"C.",
""... | The coherent WaveBurst (cWB) pipeline implements a minimally-modelled search to find a coherent response in the network of gravitational wave detectors of the LIGO-Virgo Collaboration in the time-frequency domain. In this manuscript, we provide a timely introduction to an extension of the cWB analysis to detect spectra... |
gr-qc/9712091 | Fernando Lombardo | Fernando C. Lombardo and Francisco D. Mazzitelli | Influence functional in two dimensional dilaton gravity | 25 pages, RevTex, no figures. Minor changes has been added. To appear
in Physical Review D | Phys.Rev. D58 (1998) 024009 | 10.1103/PhysRevD.58.024009 | null | gr-qc hep-th | null | We evaluate the influence functional for two dimensional models of dilaton
gravity. This functional is exactly computed when the conformal invariance is
preserved, and it can be written as the difference between the Liouville
actions on each closed-time-path branch plus a boundary term. From the
influence action we d... | [
{
"created": "Tue, 23 Dec 1997 20:02:37 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Apr 1998 19:22:51 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Lombardo",
"Fernando C.",
""
],
[
"Mazzitelli",
"Francisco D.",
""
]
] | We evaluate the influence functional for two dimensional models of dilaton gravity. This functional is exactly computed when the conformal invariance is preserved, and it can be written as the difference between the Liouville actions on each closed-time-path branch plus a boundary term. From the influence action we der... |
0907.0462 | Christian Reisswig | Christian Reisswig, Sascha Husa, Luciano Rezzolla, Ernst Nils Dorband,
Denis Pollney, Jennifer Seiler | Gravitational-wave detectability of equal-mass black-hole binaries with
aligned spins | 18 pages, 11 figures, matches published version | Phys.Rev.D80:124026,2009 | 10.1103/PhysRevD.80.124026 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary black-hole systems with spins aligned or anti-aligned to the orbital
angular momentum provide the natural ground to start detailed studies of the
influence of strong-field spin effects on gravitational wave observations of
coalescing binaries. Furthermore, such systems may be the preferred end-state
of the ins... | [
{
"created": "Thu, 2 Jul 2009 19:11:05 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jan 2010 10:33:55 GMT",
"version": "v2"
}
] | 2010-01-09 | [
[
"Reisswig",
"Christian",
""
],
[
"Husa",
"Sascha",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Dorband",
"Ernst Nils",
""
],
[
"Pollney",
"Denis",
""
],
[
"Seiler",
"Jennifer",
""
]
] | Binary black-hole systems with spins aligned or anti-aligned to the orbital angular momentum provide the natural ground to start detailed studies of the influence of strong-field spin effects on gravitational wave observations of coalescing binaries. Furthermore, such systems may be the preferred end-state of the inspi... |
2103.11999 | Hao-Jui Kuan | Hao-Jui Kuan, Daniela D. Doneva, Stoytcho S. Yazadjiev | Dynamical Formation of Scalarized Black Holes and Neutron Stars through
Stellar Core Collapse | 9 pages, 10 figures; accepted in PRL. This version is based on fully
nonlinear simulations beyond the decoupling limit | Phys. Rev. Lett. 127, 161103 (2021) | 10.1103/PhysRevLett.127.161103 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a certain class of scalar-Gauss-Bonnet gravity, the black holes and the
neutron stars can undergo spontaneous scalarization -- a strong gravity phase
transition triggered by a tachyonic instability due to the nonminimal coupling
between the scalar field and the spacetime curvature. Studies of this
phenomenon have,... | [
{
"created": "Mon, 22 Mar 2021 16:47:20 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Oct 2021 13:22:46 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Oct 2021 15:07:57 GMT",
"version": "v3"
}
] | 2021-10-18 | [
[
"Kuan",
"Hao-Jui",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In a certain class of scalar-Gauss-Bonnet gravity, the black holes and the neutron stars can undergo spontaneous scalarization -- a strong gravity phase transition triggered by a tachyonic instability due to the nonminimal coupling between the scalar field and the spacetime curvature. Studies of this phenomenon have, s... |
1705.06705 | Gregory J. Galloway | Gregory J. Galloway and Eric Ling | Topology and singularities in cosmological spacetimes obeying the null
energy condition | 8 pages; v2: minor changes, version to appear in CMP | null | 10.1007/s00220-017-3020-9 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider globally hyperbolic spacetimes with compact Cauchy surfaces in a
setting compatible with the presence of a positive cosmological constant. More
specifically, for 3+1 dimensional spacetimes which satisfy the null energy
condition and contain a future expanding compact Cauchy surface, we establish a
precise... | [
{
"created": "Thu, 18 May 2017 17:22:10 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Mar 2018 22:43:58 GMT",
"version": "v2"
}
] | 2018-03-13 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Ling",
"Eric",
""
]
] | We consider globally hyperbolic spacetimes with compact Cauchy surfaces in a setting compatible with the presence of a positive cosmological constant. More specifically, for 3+1 dimensional spacetimes which satisfy the null energy condition and contain a future expanding compact Cauchy surface, we establish a precise c... |
0912.1769 | Scott Pollack | S. E. Pollack, M. D. Turner, S. Schlamminger, C. A. Hagedorn, and J.
H. Gundlach | Charge Management for Gravitational Wave Observatories using UV LEDs | 5 pages, submitted to PRD | Phys.Rev.D81:021101,2010 | 10.1103/PhysRevD.81.021101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accumulation of electrical charge on the end mirrors of gravitational wave
observatories, such as the space-based LISA mission and ground-based LIGO
detectors, can become a source of noise limiting the sensitivity of such
detectors through electronic couplings to nearby surfaces. Torsion balances
provide an ideal mea... | [
{
"created": "Wed, 9 Dec 2009 15:09:02 GMT",
"version": "v1"
}
] | 2010-04-21 | [
[
"Pollack",
"S. E.",
""
],
[
"Turner",
"M. D.",
""
],
[
"Schlamminger",
"S.",
""
],
[
"Hagedorn",
"C. A.",
""
],
[
"Gundlach",
"J. H.",
""
]
] | Accumulation of electrical charge on the end mirrors of gravitational wave observatories, such as the space-based LISA mission and ground-based LIGO detectors, can become a source of noise limiting the sensitivity of such detectors through electronic couplings to nearby surfaces. Torsion balances provide an ideal means... |
1010.0523 | Milton Ruiz | Milton Ruiz, David Hilditch, Sebastiano Bernuzzi | Constraint preserving boundary conditions for the Z4c formulation of
general relativity | 18 pages, 8 figures | Phys.Rev.D83:024025,2011 | 10.1103/PhysRevD.83.024025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss high order absorbing constraint preserving boundary conditions for
the Z4c formulation of general relativity coupled to the moving puncture family
of gauges. We are primarily concerned with the constraint preservation and
absorption properties of these conditions. In the frozen coefficient
approximation, w... | [
{
"created": "Mon, 4 Oct 2010 10:03:25 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2011 11:41:38 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Ruiz",
"Milton",
""
],
[
"Hilditch",
"David",
""
],
[
"Bernuzzi",
"Sebastiano",
""
]
] | We discuss high order absorbing constraint preserving boundary conditions for the Z4c formulation of general relativity coupled to the moving puncture family of gauges. We are primarily concerned with the constraint preservation and absorption properties of these conditions. In the frozen coefficient approximation, wit... |
gr-qc/0309006 | Sanjeev S. Seahra | Sanjeev S. Seahra and Paul S. Wesson | Universes encircling 5-dimensional black holes | Reference added, 20 pages, 3 figures, REVTeX4 | J.Math.Phys. 44 (2003) 5664-5680 | 10.1063/1.1623617 | null | gr-qc hep-th | null | We clarify the status of two known solutions to the 5-dimensional vacuum
Einstein field equations derived by Liu, Mashhoon & Wesson (LMW) and Fukui,
Seahra & Wesson (FSW), respectively. Both 5-metrics explicitly embed
4-dimensional Friedman-Lemaitre-Robertson-Walker cosmologies with a wide range
of characteristics. W... | [
{
"created": "Mon, 1 Sep 2003 20:34:38 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jan 2004 15:50:18 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Seahra",
"Sanjeev S.",
""
],
[
"Wesson",
"Paul S.",
""
]
] | We clarify the status of two known solutions to the 5-dimensional vacuum Einstein field equations derived by Liu, Mashhoon & Wesson (LMW) and Fukui, Seahra & Wesson (FSW), respectively. Both 5-metrics explicitly embed 4-dimensional Friedman-Lemaitre-Robertson-Walker cosmologies with a wide range of characteristics. We ... |
gr-qc/0611083 | Francisco Lobo | Francisco S. N. Lobo, Aaron V. B. Arellano | Gravastars supported by nonlinear electrodynamics | 23 pages, 10 figures, LaTeX2e, IOP style files. V2: considerable
changes, references added; to appear in Class. Quant. Gravity | Class.Quant.Grav.24:1069-1088,2007 | 10.1088/0264-9381/24/5/004 | null | gr-qc astro-ph hep-th | null | Gravastar models have recently been proposed as an alternative to black
holes, mainly to avoid the problematic issues associated with event horizons
and singularities. In this work, a wide variety of gravastar models within the
context of nonlinear electrodynamics are constructed. Using the $F$
representation, specif... | [
{
"created": "Wed, 15 Nov 2006 11:21:49 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jan 2007 17:26:43 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jan 2007 10:25:39 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Lobo",
"Francisco S. N.",
""
],
[
"Arellano",
"Aaron V. B.",
""
]
] | Gravastar models have recently been proposed as an alternative to black holes, mainly to avoid the problematic issues associated with event horizons and singularities. In this work, a wide variety of gravastar models within the context of nonlinear electrodynamics are constructed. Using the $F$ representation, specific... |
1004.1760 | Sun ChengYi | Cheng-Yi Sun | Trapping Horizons in the Sultana-Dyer Space-Time | no figures, 5 pages; PCAS and key words are added | Commun.Theor.Phys.55:597-598,2011 | 10.1088/0253-6102/55/4/13 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Sultana-Dyer space-time is suggested as a model describing a black hole
embedded in an expanding universe. Recently, in \cite{0705.4012}, its global
structure is analyzed and the trapping horizons are shown. In the paper, by
directly calculating the expansions of the radial null vector fields normal to
the space-... | [
{
"created": "Sun, 11 Apr 2010 04:35:23 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Apr 2010 06:26:10 GMT",
"version": "v2"
},
{
"created": "Sat, 29 May 2010 05:44:36 GMT",
"version": "v3"
}
] | 2011-05-05 | [
[
"Sun",
"Cheng-Yi",
""
]
] | The Sultana-Dyer space-time is suggested as a model describing a black hole embedded in an expanding universe. Recently, in \cite{0705.4012}, its global structure is analyzed and the trapping horizons are shown. In the paper, by directly calculating the expansions of the radial null vector fields normal to the space-li... |
1705.07703 | Javad Taghizadeh Firouzjaee | Abasalt Rostami and Javad T. Firouzjaee | Quantum decoherence from entanglement during inflation | 11 pages | null | null | null | gr-qc astro-ph.CO hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | We study the primary entanglement effect on the decoherence of fields reduced
density matrix which are in interaction with another fields or independent mode
functions. We show that the primary entanglement has a significant role in
decoherence of the system quantum state. We find that the existence of
entanglement c... | [
{
"created": "Mon, 22 May 2017 13:09:30 GMT",
"version": "v1"
}
] | 2017-05-23 | [
[
"Rostami",
"Abasalt",
""
],
[
"Firouzjaee",
"Javad T.",
""
]
] | We study the primary entanglement effect on the decoherence of fields reduced density matrix which are in interaction with another fields or independent mode functions. We show that the primary entanglement has a significant role in decoherence of the system quantum state. We find that the existence of entanglement cou... |
2207.07060 | Valerio Faraoni | Reza Saadati, Andrea Giusti, Valerio Faraoni, Fatimah Shojai | New time-dependent solutions of viable Horndeski gravity | 17 pages, 2 figures | null | 10.1088/1475-7516/2022/09/067 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generate new spherical and time-dependent solutions of viable Horndeski
gravity by disforming a solution of the Einstein equations with scalar field
source and positive cosmological constant. They describe dynamical objects
embedded in asymptotically FLRW spacetimes and contain apparent horizons and a
finite radiu... | [
{
"created": "Thu, 14 Jul 2022 16:59:22 GMT",
"version": "v1"
}
] | 2022-10-05 | [
[
"Saadati",
"Reza",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Faraoni",
"Valerio",
""
],
[
"Shojai",
"Fatimah",
""
]
] | We generate new spherical and time-dependent solutions of viable Horndeski gravity by disforming a solution of the Einstein equations with scalar field source and positive cosmological constant. They describe dynamical objects embedded in asymptotically FLRW spacetimes and contain apparent horizons and a finite radius ... |
2402.13014 | A. Yu. Petrov | A. A. Ara\'ujo Filho, J. R. Nascimento, A. Yu. Petrov, P. J.
Porf\'irio | An exact stationary axisymmetric vacuum solution within a metric--affine
bumblebee gravity | 36 pages, version accepted to JCAP | JCAP07(2024)004 | 10.1088/1475-7516/2024/07/004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of the spontaneous Lorentz symmetry breaking, we
consider a metric--affine generalization of the gravitational sector of the
Standard--Model Extension (SME), including the Lorentz--violating (LV)
coefficients $u$ and $s^{\mu\nu}$. In this model, we derive the modified
Einstein field equations in ... | [
{
"created": "Tue, 20 Feb 2024 13:57:23 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 2024 16:20:40 GMT",
"version": "v2"
}
] | 2024-07-03 | [
[
"Filho",
"A. A. Araújo",
""
],
[
"Nascimento",
"J. R.",
""
],
[
"Petrov",
"A. Yu.",
""
],
[
"Porfírio",
"P. J.",
""
]
] | Within the framework of the spontaneous Lorentz symmetry breaking, we consider a metric--affine generalization of the gravitational sector of the Standard--Model Extension (SME), including the Lorentz--violating (LV) coefficients $u$ and $s^{\mu\nu}$. In this model, we derive the modified Einstein field equations in or... |
gr-qc/0509081 | Gaurav Khanna | Seth Connors, Gaurav Khanna | Approximate pre-classical solutions in loop quantum cosmology | 10 pages, 5 figures | Class.Quant.Grav.23:2919-2926,2006 | 10.1088/0264-9381/23/9/009 | null | gr-qc | null | In this paper we introduce a numerical approximation technique to obtain
pre-classical solutions to models of loop quantum gravity. In particular, we
apply the technique to vacuum Bianchi I cosmological models and recover known
solutions. We also present a pre-classical solution to the Bianchi I LRS model
with cosmol... | [
{
"created": "Tue, 20 Sep 2005 21:14:19 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Connors",
"Seth",
""
],
[
"Khanna",
"Gaurav",
""
]
] | In this paper we introduce a numerical approximation technique to obtain pre-classical solutions to models of loop quantum gravity. In particular, we apply the technique to vacuum Bianchi I cosmological models and recover known solutions. We also present a pre-classical solution to the Bianchi I LRS model with cosmolog... |
1904.09260 | Lo\"ic Marsot | Lo\"ic Marsot | How does the photon's spin affect Gravitational Wave measurements? | 12 pages; version 2 matches publication with an improved
introduction, 14 pages | Phys. Rev. D 100, 064050 (2019) | 10.1103/PhysRevD.100.064050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of the polarization of light beams on the time delay
measured in Gravitational Wave experiments. To this end, we consider the
Mathisson-Papapetrou-Dixon equations in a gravitational wave background, with
two of the possible spin supplementary conditions: by Frenkel-Pirani, or by
Tulczyjew. In the ... | [
{
"created": "Fri, 19 Apr 2019 16:42:09 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Sep 2019 13:07:12 GMT",
"version": "v2"
}
] | 2019-10-02 | [
[
"Marsot",
"Loïc",
""
]
] | We study the effect of the polarization of light beams on the time delay measured in Gravitational Wave experiments. To this end, we consider the Mathisson-Papapetrou-Dixon equations in a gravitational wave background, with two of the possible spin supplementary conditions: by Frenkel-Pirani, or by Tulczyjew. In the fi... |
gr-qc/0501006 | Hernando Quevedo | Hernando Quevedo | Pioneer's Anomaly and the Solar Quadrupole Moment | Typos corrected, references added | null | 10.1063/1.1900512 | null | gr-qc | null | The trajectories of test particles moving in the gravitational field of a
non-spherically symmetric mass distribution become affected by the presence of
multipole moments. In the case of hyperbolic trajectories, the quadrupole
moment of an oblate mass induces a displacement of the trajectory towards the
mass source, ... | [
{
"created": "Tue, 4 Jan 2005 05:16:28 GMT",
"version": "v1"
},
{
"created": "Mon, 23 May 2005 23:56:16 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Quevedo",
"Hernando",
""
]
] | The trajectories of test particles moving in the gravitational field of a non-spherically symmetric mass distribution become affected by the presence of multipole moments. In the case of hyperbolic trajectories, the quadrupole moment of an oblate mass induces a displacement of the trajectory towards the mass source, an... |
gr-qc/0602061 | Ouali Taoufik | A. Errahmani, T. Ouali | High energy description of dark energy in an approximate 3-brane
Brans-Dicke cosmology | 9 pages | Phys.Lett. B641 (2006) 357-361 | 10.1016/j.physletb.2006.08.063 | null | gr-qc | null | We consider a Brans-Dicke cosmology in five-dimensional space-time.
Neglecting the quadratic and the mixed Brans-Dicke terms in the Einstein
equation, we derive a modified wave equation of the Brans-Dicke field. We show
that, at high energy limit, the 3-brane Brans-Dicke cosmology could be
described as the standard o... | [
{
"created": "Wed, 15 Feb 2006 13:39:43 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Apr 2006 11:53:51 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Errahmani",
"A.",
""
],
[
"Ouali",
"T.",
""
]
] | We consider a Brans-Dicke cosmology in five-dimensional space-time. Neglecting the quadratic and the mixed Brans-Dicke terms in the Einstein equation, we derive a modified wave equation of the Brans-Dicke field. We show that, at high energy limit, the 3-brane Brans-Dicke cosmology could be described as the standard one... |
gr-qc/0609081 | Ignazio Ciufolini | Ignazio Ciufolini | On the orbit of the LARES satellite | null | null | null | null | gr-qc | null | This paper is motivated by the recent possibility to find an inexpensive
launching vehicle for the LARES satellite, however at an altitude much lower
than originally planned for the LAGEOS III/LARES satellite.
We present here a preliminary error analysis corresponding to a lower,
quasi-polar, orbit, in particular w... | [
{
"created": "Wed, 20 Sep 2006 15:01:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ciufolini",
"Ignazio",
""
]
] | This paper is motivated by the recent possibility to find an inexpensive launching vehicle for the LARES satellite, however at an altitude much lower than originally planned for the LAGEOS III/LARES satellite. We present here a preliminary error analysis corresponding to a lower, quasi-polar, orbit, in particular we an... |
1905.09671 | Adam Balcerzak | Adam Balcerzak and Konrad Marosek | Emergence of multiverse in third quantized varying constants cosmologies | 6 pages, 2 figures | Eur. Phys. J. C (2019) 79: 563 | 10.1140/epjc/s10052-019-7069-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although the standard cosmological model explains most of the observed
phenomena it still struggles with the problem of initial singularity. An
interesting scenario in which the problem of the initial singularity is somehow
circumvented was proposed in the context of string theory where the canonical
quantisation pro... | [
{
"created": "Thu, 23 May 2019 14:13:51 GMT",
"version": "v1"
},
{
"created": "Fri, 24 May 2019 13:21:22 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Jul 2019 17:24:38 GMT",
"version": "v3"
}
] | 2019-07-04 | [
[
"Balcerzak",
"Adam",
""
],
[
"Marosek",
"Konrad",
""
]
] | Although the standard cosmological model explains most of the observed phenomena it still struggles with the problem of initial singularity. An interesting scenario in which the problem of the initial singularity is somehow circumvented was proposed in the context of string theory where the canonical quantisation proce... |
1710.02327 | LIGO Scientific Collaboration and Virgo Collaboration | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams,
P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Afrough, B. Agarwal,
M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, B.
Allen, G. Allen,... | First narrow-band search for continuous gravitational waves from known
pulsars in advanced detector data | 9 Figures, 7 tables, submitted to PRD | Phys. Rev. D 96, 122006 (2017) | 10.1103/PhysRevD.96.122006 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spinning neutron stars asymmetric with respect to their rotation axis are
potential sources of continuous gravitational waves for ground-based
interferometric detectors. In the case of known pulsars a fully coherent
search, based on matched filtering, which uses the position and rotational
parameters obtained from el... | [
{
"created": "Fri, 6 Oct 2017 09:48:46 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Dec 2017 15:50:57 GMT",
"version": "v2"
}
] | 2018-01-03 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K.",
... | Spinning neutron stars asymmetric with respect to their rotation axis are potential sources of continuous gravitational waves for ground-based interferometric detectors. In the case of known pulsars a fully coherent search, based on matched filtering, which uses the position and rotational parameters obtained from elec... |
1602.05609 | Daniel Boyanovsky | Daniel Boyanovsky | Fermionic influence (action) on inflationary fluctuations | matches published version. arXiv admin note: text overlap with
arXiv:1511.06649 | Phys. Rev. D 93, 083507 (2016) | 10.1103/PhysRevD.93.083507 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by apparent persistent large scale anomalies in the CMB we study
the influence of fermionic degrees of freedom on the dynamics of inflaton
fluctuations as a possible source of violations of (nearly) scale invariance on
cosmological scales. We obtain the non-equilibrium effective action of an
inflaton-like s... | [
{
"created": "Wed, 17 Feb 2016 21:53:23 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Apr 2016 14:00:54 GMT",
"version": "v2"
}
] | 2016-04-20 | [
[
"Boyanovsky",
"Daniel",
""
]
] | Motivated by apparent persistent large scale anomalies in the CMB we study the influence of fermionic degrees of freedom on the dynamics of inflaton fluctuations as a possible source of violations of (nearly) scale invariance on cosmological scales. We obtain the non-equilibrium effective action of an inflaton-like sca... |
gr-qc/0606023 | Yaneer Bar-Yam | Yaneer Bar-Yam | ZM theory IV: Introduction to quantum concepts, Klein-Gordon and Dirac's
equations | 28 pages, 0 figures | null | null | NECSI Report 2006-06-01 | gr-qc hep-th | null | We describe a general approach to the correspondence of ZM theory with
quantum electrodynamics. As a first step, we show the correspondence of helical
clock-field states with plane wave states of the Dirac equation. Specifically,
defining the direction of time as the gradient of the field in the combined
field and sp... | [
{
"created": "Mon, 5 Jun 2006 02:32:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bar-Yam",
"Yaneer",
""
]
] | We describe a general approach to the correspondence of ZM theory with quantum electrodynamics. As a first step, we show the correspondence of helical clock-field states with plane wave states of the Dirac equation. Specifically, defining the direction of time as the gradient of the field in the combined field and spac... |
1506.05813 | Ambrish Raghoonundun | Ambrish M. Raghoonundun and David W. Hobill | Possible Physical Realizations of the Tolman VII solution | Accepted and published in PRD | Phys. Rev. D 92(12) 124005 | 10.1103/PhysRevD.92.124005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Tolman VII solution (an exact static spherically symmetric perfect fluid
solution) to the Einstein equations is reexamined, and a closed form equation
of state (EOS) is deduced for the first time. This EOS allows further analysis
leading to a viable model for compact stars to be obtained. Explicit
application of ... | [
{
"created": "Thu, 18 Jun 2015 20:23:15 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Dec 2015 21:26:47 GMT",
"version": "v2"
}
] | 2015-12-03 | [
[
"Raghoonundun",
"Ambrish M.",
""
],
[
"Hobill",
"David W.",
""
]
] | The Tolman VII solution (an exact static spherically symmetric perfect fluid solution) to the Einstein equations is reexamined, and a closed form equation of state (EOS) is deduced for the first time. This EOS allows further analysis leading to a viable model for compact stars to be obtained. Explicit application of ca... |
0812.0012 | Yi-Zen Chu | Yi-Zen Chu | The n-body problem in General Relativity up to the second post-Newtonian
order from perturbative field theory | 39 pages. The Mathematica code used in this paper can be found at
http://www.stargazing.net/yizen/PN.html Version 2: Slight re-wording of
section on removal of accelerations in 2 PN lagrangian; comments added in
conclusion; and typographical errors fixed. Article is similar to that
published in PRD | Phys.Rev.D79:044031,2009 | 10.1103/PhysRevD.79.044031 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by experimental probes of general relativity, we adopt methods from
perturbative (quantum) field theory to compute, up to certain integrals, the
effective lagrangian for its n-body problem. Perturbation theory is performed
about a background Minkowski spacetime to O[(v/c)^4] beyond Newtonian gravity,
where ... | [
{
"created": "Sat, 29 Nov 2008 02:15:09 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Feb 2009 17:19:46 GMT",
"version": "v2"
}
] | 2009-03-12 | [
[
"Chu",
"Yi-Zen",
""
]
] | Motivated by experimental probes of general relativity, we adopt methods from perturbative (quantum) field theory to compute, up to certain integrals, the effective lagrangian for its n-body problem. Perturbation theory is performed about a background Minkowski spacetime to O[(v/c)^4] beyond Newtonian gravity, where v ... |
2201.04135 | Konstantin Zloshchastiev | Konstantin G. Zloshchastiev | On asymptotic behaviour of galactic rotation curves in superfluid vacuum
theory | 5 pages, 1 figure | Astron. Rep. 65, 1078 (2021) | 10.1134/S1063772921100437 | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | The logarithmic superfluid theory of physical vacuum predicts that gravity is
an induced phenomenon, which has a multiple-scale structure. At astronomical
scales, as the distance from a gravitating center increases, gravitational
potential and corresponding spacetime metric are dominated by a Newtonian
(Schwarzschild... | [
{
"created": "Tue, 11 Jan 2022 08:30:32 GMT",
"version": "v1"
}
] | 2022-01-13 | [
[
"Zloshchastiev",
"Konstantin G.",
""
]
] | The logarithmic superfluid theory of physical vacuum predicts that gravity is an induced phenomenon, which has a multiple-scale structure. At astronomical scales, as the distance from a gravitating center increases, gravitational potential and corresponding spacetime metric are dominated by a Newtonian (Schwarzschild) ... |
0709.3074 | Patrick Peter | F. Finelli, P. Peter and N. Pinto-Neto | Spectra of primordial fluctuations in two-perfect-fluid regular bounces | 11 pages, 5 figures | Phys.Rev.D77:103508,2008 | 10.1103/PhysRevD.77.103508 | null | gr-qc | null | We introduce analytic solutions for a class of two components bouncing
models, where the bounce is triggered by a negative energy density perfect
fluid. The equation of state of the two components are constant in time, but
otherwise unrelated. By numerically integrating regular equations for scalar
cosmological pertu... | [
{
"created": "Wed, 19 Sep 2007 17:24:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Finelli",
"F.",
""
],
[
"Peter",
"P.",
""
],
[
"Pinto-Neto",
"N.",
""
]
] | We introduce analytic solutions for a class of two components bouncing models, where the bounce is triggered by a negative energy density perfect fluid. The equation of state of the two components are constant in time, but otherwise unrelated. By numerically integrating regular equations for scalar cosmological perturb... |
1310.8312 | Pierre-Henry Lambert | Pierre-Henry Lambert | Introduction to Black Hole Evaporation | 31 pages, 13 figures, 1 table. Conference proceedings. v2: misprints
corrected | PoS(Modave 2013)001 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | These lecture notes are an elementary and pedagogical introduction to the
black hole evaporation, based on a lecture given by the author at the Ninth
Modave Summer School in Mathematical Physics and are intended for PhD students.
First, quantum field theory in curved spacetime is studied and tools needed for
the rema... | [
{
"created": "Wed, 30 Oct 2013 20:21:07 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jan 2014 16:06:16 GMT",
"version": "v2"
}
] | 2014-01-17 | [
[
"Lambert",
"Pierre-Henry",
""
]
] | These lecture notes are an elementary and pedagogical introduction to the black hole evaporation, based on a lecture given by the author at the Ninth Modave Summer School in Mathematical Physics and are intended for PhD students. First, quantum field theory in curved spacetime is studied and tools needed for the remain... |
1212.0263 | James Kentosh | James Kentosh | Localized gravitational energy in a Schwarzschild field | 10 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An interpretation of general relativity is developed in which the energy used
to lift a body in a static gravitational field increases its rest mass.
Observers at different gravitational potentials would experience different mass
reference frames. It is shown that bodies falling in a Schwarzschild field
exhibit the r... | [
{
"created": "Tue, 27 Nov 2012 05:44:51 GMT",
"version": "v1"
}
] | 2012-12-04 | [
[
"Kentosh",
"James",
""
]
] | An interpretation of general relativity is developed in which the energy used to lift a body in a static gravitational field increases its rest mass. Observers at different gravitational potentials would experience different mass reference frames. It is shown that bodies falling in a Schwarzschild field exhibit the rel... |
2103.07342 | Abhik Kumar Sanyal Dr. | A. Banerjee, S. B. Duttachoudhury and Abhik Kumar Sanyal | Bianchi type I cosmological model with a viscous fluid | 9 pages, 0 figures | Journal of Mathematical Physics 26, 3010 (1985) | 10.1063/1.526676 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bianchi I cosmological models consisting of a fluid with both bulk and shear
viscosity are studied. It is shown how the dynamical importance of the shear
and the fluid density change in the course of evolution. Exact solutions with
an equation of state $\rho = p$ for a stiff fluid are also obtained in several
special... | [
{
"created": "Fri, 12 Mar 2021 15:20:28 GMT",
"version": "v1"
}
] | 2021-03-15 | [
[
"Banerjee",
"A.",
""
],
[
"Duttachoudhury",
"S. B.",
""
],
[
"Sanyal",
"Abhik Kumar",
""
]
] | Bianchi I cosmological models consisting of a fluid with both bulk and shear viscosity are studied. It is shown how the dynamical importance of the shear and the fluid density change in the course of evolution. Exact solutions with an equation of state $\rho = p$ for a stiff fluid are also obtained in several special c... |
0710.5366 | Debashis Gangopadhyay | Debashis Gangopadhyay and Somnath Mukherjee | Logarithm of the scale factor as a generalised coordinate in a
lagrangian for dark matter and dark energy | 16 pages, latex, paper shortened by 2 pages for journal publication | Phys.Lett.B665:121-124,2008 | 10.1016/j.physletb.2008.06.025 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A lagrangian for the $k-$ essence field is set up with canonical kinetic
terms and incorporating the scaling relation of [1]. There are two degrees of
freedom, {\it viz.},$q(t)= ln\enskip a(t)$ ($a(t)$ is the scale factor) and the
scalar field $\phi$, and an interaction term involving $\phi$ and $q(t)$.The
Euler-Lagr... | [
{
"created": "Mon, 29 Oct 2007 09:51:45 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Aug 2008 05:33:46 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gangopadhyay",
"Debashis",
""
],
[
"Mukherjee",
"Somnath",
""
]
] | A lagrangian for the $k-$ essence field is set up with canonical kinetic terms and incorporating the scaling relation of [1]. There are two degrees of freedom, {\it viz.},$q(t)= ln\enskip a(t)$ ($a(t)$ is the scale factor) and the scalar field $\phi$, and an interaction term involving $\phi$ and $q(t)$.The Euler-Lagran... |
1705.04359 | Mario Llerena | Andr\'es Ace\~na, Ericson L\'opez, Mario Llerena | An Extreme Rotating Black Hole in New Massive Gravity Theory | null | Revista Polit\'ecnica - Abril 2017, Vol. 39, No. 1 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New Massive Gravity is an alternative theory to General Relativity that is
used to describe the gravitational field in a (2+1)-dimensional spacetime.
Black hole solutions have been found in this theory, in particular an
asymptotically anti-de Sitter rotating black hole. We analyse some features of
this solution as it... | [
{
"created": "Thu, 11 May 2017 19:26:30 GMT",
"version": "v1"
}
] | 2017-05-15 | [
[
"Aceña",
"Andrés",
""
],
[
"López",
"Ericson",
""
],
[
"Llerena",
"Mario",
""
]
] | New Massive Gravity is an alternative theory to General Relativity that is used to describe the gravitational field in a (2+1)-dimensional spacetime. Black hole solutions have been found in this theory, in particular an asymptotically anti-de Sitter rotating black hole. We analyse some features of this solution as its ... |
2206.13588 | Octavian Micu | Roberto Casadio, Iber\^e Kuntz, Octavian Micu | Binary mergers in bootstrapped Newtonian gravity: mass gap and black
hole area law | 14 pages, 1 figure, to appear in Phys.Lett.B | null | 10.1016/j.physletb.2022.137455 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study binary mergers in bootstrapped Newtonian gravity, where higher-order
couplings are added to the non-relativistic Lagrangian for the Newtonian
potential. In this theory, the Arnowitt-Deser-Misner (ADM) mass differs from
both the proper mass of Newtonian gravity and the proper mass of general
relativity, which... | [
{
"created": "Mon, 27 Jun 2022 19:08:15 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Sep 2022 08:24:41 GMT",
"version": "v2"
}
] | 2022-09-21 | [
[
"Casadio",
"Roberto",
""
],
[
"Kuntz",
"Iberê",
""
],
[
"Micu",
"Octavian",
""
]
] | We study binary mergers in bootstrapped Newtonian gravity, where higher-order couplings are added to the non-relativistic Lagrangian for the Newtonian potential. In this theory, the Arnowitt-Deser-Misner (ADM) mass differs from both the proper mass of Newtonian gravity and the proper mass of general relativity, which a... |
gr-qc/9609013 | Ramy Brustein | Bruce Allen, Ram Brustein | Detecting relic gravitational radiation from string cosmology with LIGO | 6 pages, 5 eps figures, Revtex | Phys.Rev.D55:3260-3264,1997 | 10.1103/PhysRevD.55.3260 | WISC-MILW-96-TH-34,BGU-PH-96/09 | gr-qc astro-ph hep-th | null | A characteristic spectrum of relic gravitational radiation is produced by a
period of ``stringy inflation" in the early universe. This spectrum is unusual,
because the energy-density rises rapidly with frequency. We show that
correlation experiments with the two gravitational wave detectors being built
for the Laser ... | [
{
"created": "Thu, 5 Sep 1996 06:03:38 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Allen",
"Bruce",
""
],
[
"Brustein",
"Ram",
""
]
] | A characteristic spectrum of relic gravitational radiation is produced by a period of ``stringy inflation" in the early universe. This spectrum is unusual, because the energy-density rises rapidly with frequency. We show that correlation experiments with the two gravitational wave detectors being built for the Laser In... |
2010.04943 | Shao-Jiang Wang | Rong-Gen Cai, Shao-Jiang Wang, Su Yi, Jiang-Hao Yu | Testing weakest force with coldest spot | v1, 10 pages, 3 figures; v2, references added, discussion extended
for enlarged parameter space of Yukawa interaction, version accepted by EPJC | Eur. Phys. J. C 81, 318 (2021) | 10.1140/epjc/s10052-021-09102-y | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ultra-cold atom experiment in space with microgravity allows for realization
of dilute atomic-gas Bose-Einstein condensate (BEC) with macroscopically large
occupation number and significantly long condensate lifetime, which allows for
a precise measurement on the shape oscillation frequency by calibrating itself
over... | [
{
"created": "Sat, 10 Oct 2020 08:41:05 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 2021 02:43:50 GMT",
"version": "v2"
}
] | 2021-04-20 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Wang",
"Shao-Jiang",
""
],
[
"Yi",
"Su",
""
],
[
"Yu",
"Jiang-Hao",
""
]
] | Ultra-cold atom experiment in space with microgravity allows for realization of dilute atomic-gas Bose-Einstein condensate (BEC) with macroscopically large occupation number and significantly long condensate lifetime, which allows for a precise measurement on the shape oscillation frequency by calibrating itself over n... |
2303.00297 | Umananda Dev Goswami | Ronit Karmakar, Dhruba Jyoti Gogoi and Umananda Dev Goswami | Thermodynamics and Shadows of GUP-corrected Black Holes with Topological
Defects in Bumblebee Gravity | 20 pages, 10 figures; Accepted version of Physics of the Dark
Universe | Phys. Dark Universe 41, 101249 (2023) | 10.1016/j.dark.2023.101249 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work we investigate a Schwarzschild-type black hole that is corrected
by the Generalized Uncertainty Principle (GUP) and possesses topological
defects within the framework of Bumblebee gravity. Our focus is on the
thermodynamic characteristics of the black hole, such as temperature, entropy
and heat capacity,... | [
{
"created": "Wed, 1 Mar 2023 07:47:07 GMT",
"version": "v1"
},
{
"created": "Sun, 14 May 2023 11:39:27 GMT",
"version": "v2"
}
] | 2023-05-16 | [
[
"Karmakar",
"Ronit",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | In this work we investigate a Schwarzschild-type black hole that is corrected by the Generalized Uncertainty Principle (GUP) and possesses topological defects within the framework of Bumblebee gravity. Our focus is on the thermodynamic characteristics of the black hole, such as temperature, entropy and heat capacity, w... |
1602.04779 | Shantanu Desai | Emre O. Kahya, Shantanu Desai | Constraints on frequency-dependent violations of Shapiro delay from
GW150914 | 3 pages, accepted for publication in Phys. Lett. B. This paper is
dedicated to the memory of Prof. Steven Detweiler | Phys. Lett. B 756, 265 (2016) | 10.1016/j.physletb.2016.03.033 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On 14th September 2015, a transient gravitational wave (GW150914) was
detected by the two LIGO detectors at Hanford and Livingston from the
coalescence of a binary black hole system located at a distance of about 400
Mpc. We point out that GW150914 experienced a Shapiro delay due to the
gravitational potential of the... | [
{
"created": "Mon, 15 Feb 2016 19:54:36 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Feb 2016 21:24:59 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Mar 2016 22:37:36 GMT",
"version": "v3"
}
] | 2016-03-25 | [
[
"Kahya",
"Emre O.",
""
],
[
"Desai",
"Shantanu",
""
]
] | On 14th September 2015, a transient gravitational wave (GW150914) was detected by the two LIGO detectors at Hanford and Livingston from the coalescence of a binary black hole system located at a distance of about 400 Mpc. We point out that GW150914 experienced a Shapiro delay due to the gravitational potential of the m... |
0801.1204 | Narayan Banerjee | Narayan Banerjee, Sudipta Das, Koyel Ganguly | Chameleon field and the late time acceleration of the universe | 7 pages, 2 figures | Pramana 74:L481-L489,2010 | 10.1007/s12043-010-0044-5 | null | gr-qc astro-ph | null | In the present work, it is shown that a chameleon scalar field having a
nonminimal coupling with dark matter can give rise to a smooth transition from
a decelerated to an accelerated phase of expansion for the universe. It is
surprising to note that the coupling with the chameleon scalar field hardly
affects the evol... | [
{
"created": "Tue, 8 Jan 2008 11:09:56 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Banerjee",
"Narayan",
""
],
[
"Das",
"Sudipta",
""
],
[
"Ganguly",
"Koyel",
""
]
] | In the present work, it is shown that a chameleon scalar field having a nonminimal coupling with dark matter can give rise to a smooth transition from a decelerated to an accelerated phase of expansion for the universe. It is surprising to note that the coupling with the chameleon scalar field hardly affects the evolut... |
gr-qc/0102051 | Carlo Rovelli | Etera R. Livine, Alejandro Perez, Carlo Rovelli | 2d manifold-independent spinfoam theory | 31 pages, five figures; v2: details and one reference added | null | null | null | gr-qc | null | A number of background independent quantizations procedures have recently
been employed in 4d nonperturbative quantum gravity. We investigate and
illustrate these techniques and their relation in the context of a simple 2d
topological theory. We discuss canonical quantization, loop or spin network
states, path integr... | [
{
"created": "Mon, 12 Feb 2001 19:38:15 GMT",
"version": "v1"
},
{
"created": "Fri, 16 May 2003 09:25:09 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Livine",
"Etera R.",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Rovelli",
"Carlo",
""
]
] | A number of background independent quantizations procedures have recently been employed in 4d nonperturbative quantum gravity. We investigate and illustrate these techniques and their relation in the context of a simple 2d topological theory. We discuss canonical quantization, loop or spin network states, path integral... |
1104.4972 | Michael Reiterer | Michael Reiterer (ETH Zurich), Eugene Trubowitz (ETH Zurich) | A class of gauges for the Einstein equations | 12 pages, Subsection 4.4 simplified | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A class of gauges for the Einstein vacuum equations is introduced, along with
three symmetric hyperbolic systems. The first implies the local realizability
of the gauge. The second is the dynamical subset of the field equations. The
third is used to show that the constraints propagate. The gauges are for an
orthonorm... | [
{
"created": "Tue, 26 Apr 2011 17:19:10 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Apr 2011 17:08:46 GMT",
"version": "v2"
}
] | 2011-05-03 | [
[
"Reiterer",
"Michael",
"",
"ETH Zurich"
],
[
"Trubowitz",
"Eugene",
"",
"ETH Zurich"
]
] | A class of gauges for the Einstein vacuum equations is introduced, along with three symmetric hyperbolic systems. The first implies the local realizability of the gauge. The second is the dynamical subset of the field equations. The third is used to show that the constraints propagate. The gauges are for an orthonormal... |
1609.01477 | Chandra Prakash Singh | C P Singh and Pankaj Kumar | Holographic dark energy in Brans-Dicke theory with logarithmic form of
scalar field | 9 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, an interacting holographic dark energy model with Hubble
horizon as an infra-red cut-off is considered in the framework of Brans-Dicke
theory. We propose a logarithmic form $\phi \propto ln(\alpha+\beta a)$ of the
Brans-Dicke scalar field to alleviate the problems of interacting holographic
dark energy... | [
{
"created": "Tue, 6 Sep 2016 10:22:58 GMT",
"version": "v1"
}
] | 2016-09-07 | [
[
"Singh",
"C P",
""
],
[
"Kumar",
"Pankaj",
""
]
] | In this paper, an interacting holographic dark energy model with Hubble horizon as an infra-red cut-off is considered in the framework of Brans-Dicke theory. We propose a logarithmic form $\phi \propto ln(\alpha+\beta a)$ of the Brans-Dicke scalar field to alleviate the problems of interacting holographic dark energy m... |
2004.13492 | S. I. Kruglov | S. I. Kruglov | Universe Inflation Based on Nonlinear Electrodynamics | 22 pages, 7 figures. 1 table | Eur. Phys. J. Plus 135, 370 (2020) | 10.1140/epjp/s13360-020-00377-w | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new model of nonlinear electrodynamics with dimensional parameters $\beta$
and $\gamma$ is proposed. The principles of causality and unitarity are
studied. We show that a singularity of the electric field at the origin of
charges is absent and the maximum of the electric field in the center is
$E(0)=1/\sqrt{\beta}$... | [
{
"created": "Sun, 26 Apr 2020 22:37:31 GMT",
"version": "v1"
}
] | 2020-04-29 | [
[
"Kruglov",
"S. I.",
""
]
] | A new model of nonlinear electrodynamics with dimensional parameters $\beta$ and $\gamma$ is proposed. The principles of causality and unitarity are studied. We show that a singularity of the electric field at the origin of charges is absent and the maximum of the electric field in the center is $E(0)=1/\sqrt{\beta}$. ... |
1110.3878 | Shinji Tsujikawa | Antonio De Felice, Shinji Tsujikawa | Conditions for the cosmological viability of the most general
scalar-tensor theories and their applications to extended Galileon dark
energy models | 18 pages, 6 figures | JCAP 1202:007, 2012 | 10.1088/1475-7516/2012/02/007 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Horndeski's most general scalar-tensor theories with second-order
field equations, we derive the conditions for the avoidance of ghosts and
Laplacian instabilities associated with scalar, tensor, and vector
perturbations in the presence of two perfect fluids on the flat
Friedmann-Lemaitre-Robertson-Walker (FLR... | [
{
"created": "Tue, 18 Oct 2011 05:22:45 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"De Felice",
"Antonio",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | In the Horndeski's most general scalar-tensor theories with second-order field equations, we derive the conditions for the avoidance of ghosts and Laplacian instabilities associated with scalar, tensor, and vector perturbations in the presence of two perfect fluids on the flat Friedmann-Lemaitre-Robertson-Walker (FLRW)... |
2206.08037 | Ulf Lindstr\"om | Ulf Lindstr\"om and \"Ozg\"ur Sar{\i}o\u{g}lu | Geometry, conformal Killing-Yano tensors and conserved "currents" | 15 pages; This version considerably reworked relative to previous
ones, prompted by a number of comments from various researchers | JHEP 05 (2023) 176 | 10.1007/JHEP05(2023)176 | Uppsala Theoretical Physics preprint UUUIP-27/22 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we discuss the construction of conserved tensors (currents)
involving conformal Killing-Yano tensors (CKYTs), generalising the
corresponding constructions for Killing-Yano tensors (KYTs). As a useful
preparation for this, but also of intrinsic interest, we derive identities
relating CKYTs and geometric ... | [
{
"created": "Thu, 16 Jun 2022 09:42:36 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Mar 2023 16:15:20 GMT",
"version": "v2"
}
] | 2023-05-24 | [
[
"Lindström",
"Ulf",
""
],
[
"Sarıoğlu",
"Özgür",
""
]
] | In this paper we discuss the construction of conserved tensors (currents) involving conformal Killing-Yano tensors (CKYTs), generalising the corresponding constructions for Killing-Yano tensors (KYTs). As a useful preparation for this, but also of intrinsic interest, we derive identities relating CKYTs and geometric qu... |
1008.2768 | Stephen D. H. Hsu | Roberto Casadio, Stephen D.H. Hsu, Behrouz Mirza | Asymptotic Safety, Singularities, and Gravitational Collapse | 6 pages, latex. Version to appear in Physics Letters B | Phys.Lett.B695:317-319,2011 | 10.1016/j.physletb.2010.10.060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Asymptotic safety (an ultraviolet fixed point with finite-dimensional
critical surface) offers the possibility that a predictive theory of quantum
gravity can be obtained from the quantization of classical general relativity.
However, it is unclear what becomes of the singularities of classical general
relativity, wh... | [
{
"created": "Mon, 16 Aug 2010 20:18:47 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Nov 2010 08:35:30 GMT",
"version": "v2"
}
] | 2011-06-27 | [
[
"Casadio",
"Roberto",
""
],
[
"Hsu",
"Stephen D. H.",
""
],
[
"Mirza",
"Behrouz",
""
]
] | Asymptotic safety (an ultraviolet fixed point with finite-dimensional critical surface) offers the possibility that a predictive theory of quantum gravity can be obtained from the quantization of classical general relativity. However, it is unclear what becomes of the singularities of classical general relativity, whic... |
2406.01998 | Andronikos Paliathanasis | Andronikos Paliathanasis | The Common Solution Space of General Relativity | 20 pages, no figures | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We review the solution space for the field equations of Einstein's General
Relativity for various static, spherically symmetric spacetimes. We consider
the vacuum case, represented by the Schwarzschild black hole; the de
Sitter-Schwarzschild geometry, which includes a cosmological constant; the
Reissner-Nordstr\"{o}m... | [
{
"created": "Tue, 4 Jun 2024 06:28:15 GMT",
"version": "v1"
}
] | 2024-06-05 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | We review the solution space for the field equations of Einstein's General Relativity for various static, spherically symmetric spacetimes. We consider the vacuum case, represented by the Schwarzschild black hole; the de Sitter-Schwarzschild geometry, which includes a cosmological constant; the Reissner-Nordstr\"{o}m g... |
2206.02046 | Valerio Faraoni | Valerio Faraoni, Andrea Giusti, Sonia Jose, Serena Giardino | Peculiar thermal states in the first-order thermodynamics of gravity | 10 pages, latex | null | 10.1103/PhysRevD.106.024049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of the recently proposed first-order thermodynamics of
scalar-tensor gravity, we discuss the possibility of zero-temperature states of
equilibrium other than Einstein gravity, including pathological Brans-Dicke
theory, Palatini $f(R)$ gravity, and cuscuton gravity, all with non-dynamical
scalar fields.... | [
{
"created": "Sat, 4 Jun 2022 19:20:26 GMT",
"version": "v1"
}
] | 2022-08-17 | [
[
"Faraoni",
"Valerio",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Jose",
"Sonia",
""
],
[
"Giardino",
"Serena",
""
]
] | In the context of the recently proposed first-order thermodynamics of scalar-tensor gravity, we discuss the possibility of zero-temperature states of equilibrium other than Einstein gravity, including pathological Brans-Dicke theory, Palatini $f(R)$ gravity, and cuscuton gravity, all with non-dynamical scalar fields. T... |
2310.14411 | Andrei Lebed G | Andrei G. Lebed | Violation of the Einstein's Equivalence Principle for a Composite
Quantum Body | 4 pages | AIP Conf. Proc. 2872, 120048 (2023) | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recently, we have started to investigate behavior of a composite quantum body
in an external gravitational field in the framework of General Relativity [see,
for a review, A. G. Lebed, Mod. Phys. Lett. A, {\bf 35}, 2030010 (2020)]. As
the simplest example, we have considered a hydrogen atom in a weak
gravitational fi... | [
{
"created": "Sun, 22 Oct 2023 20:52:20 GMT",
"version": "v1"
}
] | 2023-10-24 | [
[
"Lebed",
"Andrei G.",
""
]
] | Recently, we have started to investigate behavior of a composite quantum body in an external gravitational field in the framework of General Relativity [see, for a review, A. G. Lebed, Mod. Phys. Lett. A, {\bf 35}, 2030010 (2020)]. As the simplest example, we have considered a hydrogen atom in a weak gravitational fiel... |
gr-qc/0608074 | John W. Moffat | J. W. Moffat | A Modified Gravity and its Consequences for the Solar System,
Astrophysics and Cosmology | 16 pages. Latex file. Talk given at the International Workshop "From
Quantum to Cosmos: Fundamental Physics in Space", 22-24 May, 2006, Warrenton,
Virginia, USA. To be published in Int. J. Mod. Phys D. Equation corrected | Int.J.Mod.Phys.D16:2075-2090,2008 | 10.1142/S0218271807011577 | null | gr-qc | null | A relativistic modified gravity (MOG) theory leads to a self-consistent,
stable gravity theory that can describe the solar system, galaxy and clusters
of galaxies data and cosmology.
| [
{
"created": "Tue, 15 Aug 2006 22:41:03 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Dec 2006 21:56:02 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Moffat",
"J. W.",
""
]
] | A relativistic modified gravity (MOG) theory leads to a self-consistent, stable gravity theory that can describe the solar system, galaxy and clusters of galaxies data and cosmology. |
1608.07521 | Arick Shao | Gustav Holzegel, Arick Shao | Unique continuation from infinity in asympotically Anti-de Sitter
spacetimes II: Non-static boundaries | 45 pages. Newest version incorporated changes from referee comments
and fixed minor typos | null | 10.1080/03605302.2017.1390677 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize our unique continuation results recently established for a
class of linear and nonlinear wave equations $\Box_g \phi + \sigma \phi =
\mathcal{G} ( \phi, \partial \phi )$ on asymptotically anti-de Sitter (aAdS)
spacetimes to aAdS spacetimes admitting non-static boundary metrics. The new
Carleman estimate... | [
{
"created": "Fri, 26 Aug 2016 16:53:24 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Nov 2017 16:59:08 GMT",
"version": "v2"
}
] | 2017-11-29 | [
[
"Holzegel",
"Gustav",
""
],
[
"Shao",
"Arick",
""
]
] | We generalize our unique continuation results recently established for a class of linear and nonlinear wave equations $\Box_g \phi + \sigma \phi = \mathcal{G} ( \phi, \partial \phi )$ on asymptotically anti-de Sitter (aAdS) spacetimes to aAdS spacetimes admitting non-static boundary metrics. The new Carleman estimates ... |
gr-qc/0209112 | Barrabes | C. Barrabes, P.A. Hogan | A Class of Collisions of Plane Impulsive Light--Like Signals in General
Relativity | 14 pages, lateX | Int.J.Mod.Phys. D11 (2002) 933-945 | 10.1142/S0218271802002116 | null | gr-qc | null | We present a systematic study of collisions of homogeneous, plane--fronted,
impulsive light--like signals which do not interact after head--on collision.
For the head--on collision of two such signals, six real parameters are
involved, three from each of the incoming signals. We find two necessary
conditions to be sa... | [
{
"created": "Mon, 30 Sep 2002 09:45:06 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Barrabes",
"C.",
""
],
[
"Hogan",
"P. A.",
""
]
] | We present a systematic study of collisions of homogeneous, plane--fronted, impulsive light--like signals which do not interact after head--on collision. For the head--on collision of two such signals, six real parameters are involved, three from each of the incoming signals. We find two necessary conditions to be sati... |
0803.3442 | Alexei Zayats | Alexander B. Balakin, Heinz Dehnen, Alexei E. Zayats | Non-minimal pp-wave Einstein-Yang-Mills-Higgs model: color cross-effects
induced by curvature | 19 pages, accepted to Gen. Rel. Grav | Gen.Rel.Grav.40:2493-2513,2008 | 10.1007/s10714-008-0634-4 | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-minimal interactions in the pp-wave Einstein - Yang - Mills - Higgs
(EYMH) model are shown to give rise to color cross-effects analogous to the
magneto-electricity in the Maxwell theory. In order to illustrate the
significance of these color cross-effects, we reconstruct the effective
(associated, color and color... | [
{
"created": "Mon, 24 Mar 2008 18:14:58 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Dehnen",
"Heinz",
""
],
[
"Zayats",
"Alexei E.",
""
]
] | Non-minimal interactions in the pp-wave Einstein - Yang - Mills - Higgs (EYMH) model are shown to give rise to color cross-effects analogous to the magneto-electricity in the Maxwell theory. In order to illustrate the significance of these color cross-effects, we reconstruct the effective (associated, color and color-a... |
gr-qc/0208001 | Anzhong Wang | Paulo R.C.T. Pereira and A.Z. Wang | Collapsing and Expanding Cylindrically Symmetric Fields with Ligh-tlike
Wave-Fronts in General Relativity | 3 figures, prepared in Latex. Inter. J. Mod. Phys. D11, 561-579
(2002) | Int.J.Mod.Phys. D11 (2002) 561-579 | 10.1142/S0218271802001664 | null | gr-qc | null | The dynamics of collapsing and expanding cylindrically symmetric
gravitational and matter fields with lightlike wave-fronts is studied in
General Relativity, using the Barrabes-Israel method. As an application of the
general formulae developed, the collapse of a matter field that satisfies the
condition R_{AB}g^{AB} ... | [
{
"created": "Thu, 1 Aug 2002 19:02:48 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Pereira",
"Paulo R. C. T.",
""
],
[
"Wang",
"A. Z.",
""
]
] | The dynamics of collapsing and expanding cylindrically symmetric gravitational and matter fields with lightlike wave-fronts is studied in General Relativity, using the Barrabes-Israel method. As an application of the general formulae developed, the collapse of a matter field that satisfies the condition R_{AB}g^{AB} = ... |
1008.0248 | Martin Scholtz | Ji\v{r}\'i Bi\v{c}\'ak and Martin Scholtz and Paul Tod | On asymptotically flat solutions of Einstein's equations periodic in
time II. Spacetimes with scalar-field sources | 29 pages, published in Class. Quant. Grav. Replaced. Typos corrected,
version which appeared in Class. Quant.Grav | Class.Quant.Grav.27:175011,2010 | 10.1088/0264-9381/27/17/175011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the work in our earlier article [4] to show that time-periodic,
asymptotically-flat solutions of the Einstein equations analytic at scri, whose
source is one of a range of scalar-field models, are necessarily stationary. We
also show that, for some of these scalar-field sources, in stationary,
asymptoticall... | [
{
"created": "Mon, 2 Aug 2010 08:07:20 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Aug 2010 10:08:48 GMT",
"version": "v2"
}
] | 2011-01-18 | [
[
"Bičák",
"Jiří",
""
],
[
"Scholtz",
"Martin",
""
],
[
"Tod",
"Paul",
""
]
] | We extend the work in our earlier article [4] to show that time-periodic, asymptotically-flat solutions of the Einstein equations analytic at scri, whose source is one of a range of scalar-field models, are necessarily stationary. We also show that, for some of these scalar-field sources, in stationary, asymptotically-... |
2010.15079 | Javlon Rayimbaev Javlon | Javlon Rayimbaev, Ahmadjon Abdujabbarov, Mubasher Jamil, Bobomurat
Ahmedov, Wen-Biao Han | Dynamics of test particles around renormalization group improved
Schwarzschild black holes | 16 pages, 16 figures. arXiv admin note: text overlap with
arXiv:2010.12863 | Phys. Rev. D 102, 084016 (2020) | 10.1103/PhysRevD.102.084016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have investigated the dynamics of neutral, electrically
charged and magnetized particles around renormalized group improved (RGI)
Schwarzschild black hole in the presence of external asymptotically uniform
magnetic field. We have analyzed the spacetime structure around RGI black hole
by investigating... | [
{
"created": "Mon, 26 Oct 2020 08:58:33 GMT",
"version": "v1"
}
] | 2020-11-02 | [
[
"Rayimbaev",
"Javlon",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Han",
"Wen-Biao",
""
]
] | In this paper we have investigated the dynamics of neutral, electrically charged and magnetized particles around renormalized group improved (RGI) Schwarzschild black hole in the presence of external asymptotically uniform magnetic field. We have analyzed the spacetime structure around RGI black hole by investigating R... |
2108.08242 | Despoina Pazouli | Despoina Pazouli | High-harmonic cosmic strings and gravitational waves | PhD thesis, School of Physics and Astronomy, Faculty of Science,
University of Nottingham, October 2020 | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this thesis we describe high-harmonic cosmic string loops in a general
relativistic context, and study the implications of high-harmonic content for
the predicted gravitational wave signal from cosmic string networks. Initially,
we introduce the variational principle, spacetime concepts and other
mathematical tool... | [
{
"created": "Wed, 18 Aug 2021 17:02:36 GMT",
"version": "v1"
}
] | 2021-08-19 | [
[
"Pazouli",
"Despoina",
""
]
] | In this thesis we describe high-harmonic cosmic string loops in a general relativistic context, and study the implications of high-harmonic content for the predicted gravitational wave signal from cosmic string networks. Initially, we introduce the variational principle, spacetime concepts and other mathematical tools ... |
1012.5619 | Yurii Ignatyev | Yu.G.Ignatyev, K.Alsmadi | The complete relativistic kinetic model of violation of symmetry in
isotopic expanding plasma and production of baryons in hot Universe. I. Exact
model | 12 pages | Grav.Cosmol.11:1-12,2005 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The complete model of production of baryons in expanding primordial
symmetrical hot Universe is constructed in terms of general relativistic
kinetic theory
| [
{
"created": "Mon, 27 Dec 2010 14:41:21 GMT",
"version": "v1"
}
] | 2011-01-28 | [
[
"Ignatyev",
"Yu. G.",
""
],
[
"Alsmadi",
"K.",
""
]
] | The complete model of production of baryons in expanding primordial symmetrical hot Universe is constructed in terms of general relativistic kinetic theory |
gr-qc/9912023 | Alessandro Fabbri | G. Clement and A. Fabbri | The cosmological gravitating $\sigma$ model: solitons and black holes | 10 pages, latex | Class.Quant.Grav. 17 (2000) 2537-2546 | 10.1088/0264-9381/17/13/307 | null | gr-qc hep-th | null | We derive and analyze exact static solutions to the gravitating O(3) $\sigma$
model with cosmological constant in (2+1) dimensions. Both signs of the
gravitational and cosmological constants are considered. Our solutions include
geodesically complete spacetimes, and two classes of black holes.
| [
{
"created": "Tue, 7 Dec 1999 22:32:53 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Dec 1999 12:06:58 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Clement",
"G.",
""
],
[
"Fabbri",
"A.",
""
]
] | We derive and analyze exact static solutions to the gravitating O(3) $\sigma$ model with cosmological constant in (2+1) dimensions. Both signs of the gravitational and cosmological constants are considered. Our solutions include geodesically complete spacetimes, and two classes of black holes. |
gr-qc/0406116 | Manuel Tiglio | Luis Lehner, David Neilsen, Oscar Reula, and Manuel Tiglio | The discrete energy method in numerical relativity: Towards long-term
stability | 18 pages, 22 figures | Class.Quant.Grav. 21 (2004) 5819-5848 | 10.1088/0264-9381/21/24/009 | LSU-REL-062804 | gr-qc | null | The energy method can be used to identify well-posed initial boundary value
problems for quasi-linear, symmetric hyperbolic partial differential equations
with maximally dissipative boundary conditions. A similar analysis of the
discrete system can be used to construct stable finite difference equations for
these pro... | [
{
"created": "Tue, 29 Jun 2004 00:02:38 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Lehner",
"Luis",
""
],
[
"Neilsen",
"David",
""
],
[
"Reula",
"Oscar",
""
],
[
"Tiglio",
"Manuel",
""
]
] | The energy method can be used to identify well-posed initial boundary value problems for quasi-linear, symmetric hyperbolic partial differential equations with maximally dissipative boundary conditions. A similar analysis of the discrete system can be used to construct stable finite difference equations for these probl... |
1809.09554 | Tatyana P. Shestakova | T. P. Shestakova | Is the Copenhagen interpretation inapplicable to Quantum Cosmology? | 23 pages, no figures, the version of the paper that has been
published in the journal Universe | Universe 6 (2020) 128 | 10.3390/universe6090128 | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is generally accepted that the Copenhagen interpretation is inapplicable
to quantum cosmology, by contrast with the many worlds interpretation. I shall
demonstrate that the two basic principles of the Copenhagen interpretation, the
principle of wholeness and the principle of complementarity, do make sense in
quant... | [
{
"created": "Tue, 25 Sep 2018 15:36:40 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Aug 2020 13:14:51 GMT",
"version": "v2"
}
] | 2020-08-25 | [
[
"Shestakova",
"T. P.",
""
]
] | It is generally accepted that the Copenhagen interpretation is inapplicable to quantum cosmology, by contrast with the many worlds interpretation. I shall demonstrate that the two basic principles of the Copenhagen interpretation, the principle of wholeness and the principle of complementarity, do make sense in quantum... |
1504.04173 | Behnam Pourhassan | B. Pourhassan | Unified universe history through phantom extended Chaplygin gas | 25 pages, 16 figures | Canadian Journal of Physics 94 (2016) 659 | 10.1139/cjp-2016-0154 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the universe evolution from inflation to late-time
acceleration in a unified way, using a two-component fluid constituted from
extended Chaplygin gas alongside a phantom scalar field. We extract solutions
for the various cosmological eras, focusing on the behavior of the scale
factor, the various densi... | [
{
"created": "Wed, 15 Apr 2015 19:49:58 GMT",
"version": "v1"
}
] | 2016-07-15 | [
[
"Pourhassan",
"B.",
""
]
] | We investigate the universe evolution from inflation to late-time acceleration in a unified way, using a two-component fluid constituted from extended Chaplygin gas alongside a phantom scalar field. We extract solutions for the various cosmological eras, focusing on the behavior of the scale factor, the various density... |
2105.05050 | Adam Zenon Kaczmarek | Adam Zenon Kaczmarek and Dominik Szcz\k{e}\'sniak | Cosmology in the mimetic higher-curvature $f(R, R_{\mu\nu}R^{\mu\nu})$
gravity | 12 pages, 2 figures | null | 10.1038/s41598-021-97907-y | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the framework of the mimetic approach, we study the
$f(R,R_{\mu\nu}R^{\mu\nu})$ gravity with the Lagrange multiplier constraint and
the scalar potential. We introduce field equations for the discussed theory and
overview their properties. By using the general reconstruction scheme we obtain
the power law cosmology... | [
{
"created": "Sun, 9 May 2021 10:29:42 GMT",
"version": "v1"
}
] | 2021-11-18 | [
[
"Kaczmarek",
"Adam Zenon",
""
],
[
"Szczęśniak",
"Dominik",
""
]
] | In the framework of the mimetic approach, we study the $f(R,R_{\mu\nu}R^{\mu\nu})$ gravity with the Lagrange multiplier constraint and the scalar potential. We introduce field equations for the discussed theory and overview their properties. By using the general reconstruction scheme we obtain the power law cosmology m... |
gr-qc/0412131 | Plamen Fiziev | Plamen Fiziev | The Gravitational Field of Massive Non-Charged Point Source in General
Relativity | 12 pages, latex file, no figures | in Proceedings of the Conference Contemporary Aspects of
Astronomy, Theoretical and Gravitational Physics, May 20-22, 2004, Sofia,
Bulgaria | null | SU-TH-22-04 | gr-qc | null | Utilizing various gauges of the radial coordinate we give a description of
static spherically symmetric space-times with point singularity at the center
and vacuum outside the singularity. We show that in general relativity (GR)
there exist a two-parameters family of such solutions to the Einstein equations
which are... | [
{
"created": "Thu, 30 Dec 2004 12:22:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fiziev",
"Plamen",
""
]
] | Utilizing various gauges of the radial coordinate we give a description of static spherically symmetric space-times with point singularity at the center and vacuum outside the singularity. We show that in general relativity (GR) there exist a two-parameters family of such solutions to the Einstein equations which are p... |
2207.04720 | Alejandro Garc\'ia-Quismondo | Alejandro Garc\'ia-Quismondo and Guillermo A. Mena Marug\'an | Two-time alternative to the Ashtekar-Olmedo-Singh black hole interior | 21 pages and 5 figures | Phys. Rev. D 106, 023532 (2022) | 10.1103/PhysRevD.106.023532 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the viability of a recently proposed generalization of the
Ashtekar-Olmedo-Singh spacetime for the effective description of the interior
region of a Schwarzschild black hole within the framework of loop quantum
cosmology. The approach is based on a choice of polymerization parameters that
is more gener... | [
{
"created": "Mon, 11 Jul 2022 08:59:50 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"García-Quismondo",
"Alejandro",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
]
] | We investigate the viability of a recently proposed generalization of the Ashtekar-Olmedo-Singh spacetime for the effective description of the interior region of a Schwarzschild black hole within the framework of loop quantum cosmology. The approach is based on a choice of polymerization parameters that is more general... |
1501.01641 | Olivier Sarbach | Eliana Chaverra and Olivier Sarbach | Radial accretion flows on static spherically symmetric black holes | 25 pages, 5 figures. Typos corrected, additional references, new
figure showing accretion flow in deformed Schwarzschild black hole. To appear
in Classical and Quantum Gravity | null | 10.1088/0264-9381/32/15/155006 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the steady radial accretion of matter into a nonrotating black
hole. Neglecting the self-gravity of the accreting matter, we consider a rather
general class of static, spherically symmetric and asymptotically flat
background spacetimes with a regular horizon. In addition to the Schwarzschild
metric, this c... | [
{
"created": "Wed, 7 Jan 2015 21:00:33 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jun 2015 17:45:07 GMT",
"version": "v2"
}
] | 2015-08-06 | [
[
"Chaverra",
"Eliana",
""
],
[
"Sarbach",
"Olivier",
""
]
] | We analyze the steady radial accretion of matter into a nonrotating black hole. Neglecting the self-gravity of the accreting matter, we consider a rather general class of static, spherically symmetric and asymptotically flat background spacetimes with a regular horizon. In addition to the Schwarzschild metric, this cla... |
2304.10623 | Adnan Malik | Zoya Asghar, M. Farasat Shamir, Ammara Usman, Adnan Malik | Study of Embedded Class-I Fluid Spheres in $f(R,T)$ Gravity with
Karmarkar Condition | 12 pages, 10 figures, Accepted for publication in Chinese Journal of
Physics | null | 10.1016/j.cjph.2023.04.009 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article, we explore some emerging properties of the stellar objects
in the frame of the $f(R,T)$ gravity by employing the well-known Karmarkar
condition, where $R$ and $T$ represent Ricci scalar and trace of energy
momentum tensor respectively. It is worthy to highlight here that we assume the
exponential typ... | [
{
"created": "Wed, 19 Apr 2023 14:09:47 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Asghar",
"Zoya",
""
],
[
"Shamir",
"M. Farasat",
""
],
[
"Usman",
"Ammara",
""
],
[
"Malik",
"Adnan",
""
]
] | In this article, we explore some emerging properties of the stellar objects in the frame of the $f(R,T)$ gravity by employing the well-known Karmarkar condition, where $R$ and $T$ represent Ricci scalar and trace of energy momentum tensor respectively. It is worthy to highlight here that we assume the exponential type ... |
gr-qc/9911112 | Abel Camacho Quintana | Abel Camacho Quintana (Astrophysikalisches Institut Potsdam) | Flavor-oscillation clocks, continuous quantum measurements and a
violation of Einstein equivalence principle | 16 pages, accepted in Mod. Phys. Letts.A | Mod.Phys.Lett. A14 (1999) 2545-2556 | 10.1142/S0217732399002662 | null | gr-qc quant-ph | null | The relation between Einstein equivalence principle and a continuous quantum
measurement is analyzed in the context of the recently proposed
flavor-oscillation clocks, an idea pioneered by Ahluwalia and Burgard (Gen. Rel
Grav. Errata 29, 681 (1997)). We will calculate the measurement outputs if a
flavor-oscillation c... | [
{
"created": "Sun, 28 Nov 1999 15:31:27 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Quintana",
"Abel Camacho",
"",
"Astrophysikalisches Institut Potsdam"
]
] | The relation between Einstein equivalence principle and a continuous quantum measurement is analyzed in the context of the recently proposed flavor-oscillation clocks, an idea pioneered by Ahluwalia and Burgard (Gen. Rel Grav. Errata 29, 681 (1997)). We will calculate the measurement outputs if a flavor-oscillation clo... |
1911.09892 | Patrick Peter | Przemyslaw Malkiewicz, Patrick Peter, S. D. P. Vitenti | Quantum empty Bianchi I spacetime with internal time | 16 pages, 13 figures, matches version to appear in Phys. Rev. D | Phys. Rev. D 101, 046012 (2020) | 10.1103/PhysRevD.101.046012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the question of time in a Bianchi I quantum cosmology in the
framework of singularity avoidance. We show that time parameters fall into two
distinct classes, that are such that the time development of the wave function
either always leads to the appearance of a singularity (fast-gauge time) or
that always ... | [
{
"created": "Fri, 22 Nov 2019 07:12:28 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jan 2020 09:57:52 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Feb 2020 14:02:19 GMT",
"version": "v3"
}
] | 2020-02-18 | [
[
"Malkiewicz",
"Przemyslaw",
""
],
[
"Peter",
"Patrick",
""
],
[
"Vitenti",
"S. D. P.",
""
]
] | We discuss the question of time in a Bianchi I quantum cosmology in the framework of singularity avoidance. We show that time parameters fall into two distinct classes, that are such that the time development of the wave function either always leads to the appearance of a singularity (fast-gauge time) or that always pr... |
gr-qc/0306125 | Daniel A. Shaddock | Daniel A. Shaddock | Operating LISA as a Sagnac interferometer | 8 pages, 2 figures | Phys.Rev. D69 (2004) 022001 | 10.1103/PhysRevD.69.022001 | null | gr-qc | null | A phase-locking configuration for LISA is proposed that provides a
significantly simpler mode of operation. The scheme provides one Sagnac signal
readout inherently insensitive to laser frequency noise and optical bench
motion for a non-rotating LISA array. This Sagnac output is also insensitive to
clock noise, requi... | [
{
"created": "Sun, 29 Jun 2003 18:28:42 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Shaddock",
"Daniel A.",
""
]
] | A phase-locking configuration for LISA is proposed that provides a significantly simpler mode of operation. The scheme provides one Sagnac signal readout inherently insensitive to laser frequency noise and optical bench motion for a non-rotating LISA array. This Sagnac output is also insensitive to clock noise, require... |
1711.07259 | Mariana Penna-Lima Vitenti | M.E.S. Alves, F.C. Carvalho, J.C.N. de Araujo, M. Penna-Lima, S.D.P.
Vitenti | Cosmological constant constraints from observation-derived energy
condition bounds and their application to bimetric massive gravity | 11 pages, 4 figures, 1 table | Eur. Phys. J. C (2018) 78: 710 | 10.1140/epjc/s10052-018-6190-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Among the various possibilities to probe the theory behind the recent
accelerated expansion of the universe, the energy conditions (ECs) are of
particular interest, since it is possible to confront and constrain the many
models, including different theories of gravity, with observational data. In
this context, we use... | [
{
"created": "Mon, 20 Nov 2017 11:30:24 GMT",
"version": "v1"
}
] | 2018-09-17 | [
[
"Alves",
"M. E. S.",
""
],
[
"Carvalho",
"F. C.",
""
],
[
"de Araujo",
"J. C. N.",
""
],
[
"Penna-Lima",
"M.",
""
],
[
"Vitenti",
"S. D. P.",
""
]
] | Among the various possibilities to probe the theory behind the recent accelerated expansion of the universe, the energy conditions (ECs) are of particular interest, since it is possible to confront and constrain the many models, including different theories of gravity, with observational data. In this context, we use t... |
2105.01716 | Muhammed Saleem C | M. Saleem, Javed Rana, V. Gayathri, Aditya Vijaykumar, Srashti Goyal,
Surabhi Sachdev, Jishnu Suresh, S. Sudhagar, Arunava Mukherjee, Gurudatt
Gaur, Bangalore Sathyaprakash, Archana Pai, Rana X Adhikari, P. Ajith,
Sukanta Bose | The Science Case for LIGO-India | 29 pages, 8 figures | Class. Quantum Grav. 39 025004 (2022) | 10.1088/1361-6382/ac3b99 | null | gr-qc astro-ph.HE | http://creativecommons.org/publicdomain/zero/1.0/ | The global network of gravitational-wave detectors has completed three
observing runs with $\sim 50$ detections of merging compact binaries. A third
LIGO detector, with comparable astrophysical reach, is to be built in India
(LIGO-Aundha) and expected to be operational during the latter part of this
decade. Multiple ... | [
{
"created": "Tue, 4 May 2021 19:15:26 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Dec 2021 19:28:34 GMT",
"version": "v2"
}
] | 2022-01-04 | [
[
"Saleem",
"M.",
""
],
[
"Rana",
"Javed",
""
],
[
"Gayathri",
"V.",
""
],
[
"Vijaykumar",
"Aditya",
""
],
[
"Goyal",
"Srashti",
""
],
[
"Sachdev",
"Surabhi",
""
],
[
"Suresh",
"Jishnu",
""
],
[
"Sudh... | The global network of gravitational-wave detectors has completed three observing runs with $\sim 50$ detections of merging compact binaries. A third LIGO detector, with comparable astrophysical reach, is to be built in India (LIGO-Aundha) and expected to be operational during the latter part of this decade. Multiple de... |
0802.1972 | Ion I. Cot{\ba}escu | Ion I. Cotaescu, Cosmin Crucean, Adrian Pop | The quantum theory of scalar fields on the de Sitter expanding universe | 16 pages, no figures | Int.J.Mod.Phys.A23:2563-2577,2008 | 10.1142/S0217751X08040494 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New quantum modes of the free scalar field are derived in a special
time-evolution picture that may be introduced in moving charts of de Sitter
backgrounds. The wave functions of these new modes are solutions of the
Klein-Gordon equation and energy eigenfunctions, defining the energy basis.
This completes the scalar ... | [
{
"created": "Thu, 14 Feb 2008 08:11:20 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cotaescu",
"Ion I.",
""
],
[
"Crucean",
"Cosmin",
""
],
[
"Pop",
"Adrian",
""
]
] | New quantum modes of the free scalar field are derived in a special time-evolution picture that may be introduced in moving charts of de Sitter backgrounds. The wave functions of these new modes are solutions of the Klein-Gordon equation and energy eigenfunctions, defining the energy basis. This completes the scalar qu... |
2405.03431 | David Fajman | David Fajman, Maciej Maliborski, Maximilian Ofner, Todd Oliynyk, Zoe
Wyatt | Phase transition between shock formation and stability in cosmological
fluids | 6 pages, 3 figures | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We demonstrate a novel phase transition from stable to unstable fluid
behaviour for fluid-filled cosmological spacetimes undergoing decelerated
expansion. This transition occurs when the fluid speed of sound $c_S$ exceeds a
critical value relative to the expansion rate $a(t) = t^\alpha$ of spacetime.
We present an ex... | [
{
"created": "Mon, 6 May 2024 12:53:02 GMT",
"version": "v1"
}
] | 2024-05-07 | [
[
"Fajman",
"David",
""
],
[
"Maliborski",
"Maciej",
""
],
[
"Ofner",
"Maximilian",
""
],
[
"Oliynyk",
"Todd",
""
],
[
"Wyatt",
"Zoe",
""
]
] | We demonstrate a novel phase transition from stable to unstable fluid behaviour for fluid-filled cosmological spacetimes undergoing decelerated expansion. This transition occurs when the fluid speed of sound $c_S$ exceeds a critical value relative to the expansion rate $a(t) = t^\alpha$ of spacetime. We present an expl... |
1504.06321 | Cristian Martinez | Cristian Erices and Cristian Martinez | Stationary cylindrically symmetric spacetimes with a massless scalar
field and a non-positive cosmological constant | 7 pages | Phys. Rev. D 92, 044051 (2015) | 10.1103/PhysRevD.92.044051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general stationary cylindrically symmetric solution of Einstein-massless
scalar field system with a non-positive cosmological constant is presented. It
is shown that the general solution is characterized by four integration
constants. Two of these essential parameters have a local meaning and
characterize the gra... | [
{
"created": "Thu, 23 Apr 2015 20:00:13 GMT",
"version": "v1"
}
] | 2015-09-02 | [
[
"Erices",
"Cristian",
""
],
[
"Martinez",
"Cristian",
""
]
] | The general stationary cylindrically symmetric solution of Einstein-massless scalar field system with a non-positive cosmological constant is presented. It is shown that the general solution is characterized by four integration constants. Two of these essential parameters have a local meaning and characterize the gravi... |
1910.03546 | Vasilis Oikonomou | Shin'ichi Nojiri, S.D. Odintsov, V.K. Oikonomou, Tanmoy Paul | Non-singular Bounce Cosmology from Lagrange Multiplier $F(R)$ Gravity | PRD Accepted | null | 10.1103/PhysRevD.100.084056 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study non-singular{ bounce cosmology} in the context of the
Lagrange multiplier generalized $F(R)$ gravity theory of gravity. We specify
our study by using a specific variant form of the well known matter{ bounce
cosmology}, with scale factor $a(t) = \left(a_0t^2 + 1 \right)^n$, and we
demonstrate tha... | [
{
"created": "Tue, 8 Oct 2019 17:11:41 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | In this work we study non-singular{ bounce cosmology} in the context of the Lagrange multiplier generalized $F(R)$ gravity theory of gravity. We specify our study by using a specific variant form of the well known matter{ bounce cosmology}, with scale factor $a(t) = \left(a_0t^2 + 1 \right)^n$, and we demonstrate that ... |
1101.1690 | Hanno Sahlmann | Hanno Sahlmann and Thomas Thiemann | Chern-Simons theory, Stokes' Theorem, and the Duflo map | 26 pages, 8 figures | J.Geom.Phys.61:1104-1121,2011 | 10.1016/j.geomphys.2011.02.013 | APCTP Pre2010-007 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a novel derivation of the expectation values of holonomies in
Chern-Simons theory, based on Stokes' Theorem and the functional properties of
the Chern-Simons action. It involves replacing the connection by certain
functional derivatives under the path integral integral. It turns out that
ordering choices ... | [
{
"created": "Mon, 10 Jan 2011 00:21:00 GMT",
"version": "v1"
}
] | 2011-05-26 | [
[
"Sahlmann",
"Hanno",
""
],
[
"Thiemann",
"Thomas",
""
]
] | We consider a novel derivation of the expectation values of holonomies in Chern-Simons theory, based on Stokes' Theorem and the functional properties of the Chern-Simons action. It involves replacing the connection by certain functional derivatives under the path integral integral. It turns out that ordering choices ha... |
gr-qc/9703008 | Renaud Parentani | Renaud Parentani | The interpretation of the solutions of the Wheeler De Witt equation | 11 pages, latex, no figures | Phys.Rev. D56 (1997) 4618-4624 | 10.1103/PhysRevD.56.4618 | null | gr-qc | null | We extract transition amplitudes among matter constituents of the universe
from the solutions of the Wheeler De Witt equation. The physical interpretation
of these solutions is then reached by an analysis of the properties of the
transition amplitudes. The interpretation so obtained is based on the current
carried by... | [
{
"created": "Tue, 4 Mar 1997 11:14:32 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Parentani",
"Renaud",
""
]
] | We extract transition amplitudes among matter constituents of the universe from the solutions of the Wheeler De Witt equation. The physical interpretation of these solutions is then reached by an analysis of the properties of the transition amplitudes. The interpretation so obtained is based on the current carried by t... |
2007.05988 | Grigory Volovik | G.E. Volovik | Double Hawking temperature in de Sitter Universe and cosmological
constant problem | 7 pages, no figures | null | null | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As distinct from the black hole physics, the de Sitter thermodynamics is not
determined by the cosmological horizon, the effective temperature differs from
the Hawking temperature. In particular, the atom in the de Sitter universe
experiences thermal activation corresponding to the local temperature, which is
twice l... | [
{
"created": "Sun, 12 Jul 2020 13:37:22 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Aug 2020 15:01:50 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Sep 2020 13:12:44 GMT",
"version": "v3"
},
{
"created": "Mon, 26 Oct 2020 09:26:03 GMT",
"version": "v4"
},
{
"cr... | 2021-04-22 | [
[
"Volovik",
"G. E.",
""
]
] | As distinct from the black hole physics, the de Sitter thermodynamics is not determined by the cosmological horizon, the effective temperature differs from the Hawking temperature. In particular, the atom in the de Sitter universe experiences thermal activation corresponding to the local temperature, which is twice lar... |
gr-qc/0512005 | Sang Pyo Kim | Sang Pyo Kim (Kunsan Nat'l Univ.) | Quasinormal modes of black holes and dissipative open systems | RevTex 9 pages, one figure; Talks at Black Hole V, Canada, 2005 and
9th Italian-Korean Symposium, Korea, 2005; note and references added in proof | J.Korean Phys.Soc. 49 (2006) 764-772 | null | null | gr-qc astro-ph hep-th | null | After explaining the physical origin of the quasinormal modes of
perturbations in the background geometry of a black hole, I critically review
the recent proposal for the quantization of the black-hole area based on the
real part of quasinormal modes. As instantons due to the barriers of black-hole
potentials lie at ... | [
{
"created": "Thu, 1 Dec 2005 01:08:09 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2006 13:15:14 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kim",
"Sang Pyo",
"",
"Kunsan Nat'l Univ."
]
] | After explaining the physical origin of the quasinormal modes of perturbations in the background geometry of a black hole, I critically review the recent proposal for the quantization of the black-hole area based on the real part of quasinormal modes. As instantons due to the barriers of black-hole potentials lie at th... |
2012.02432 | Matsuno Satsuki | Hideki Ishihara, Satsuki Matsuno | Solutions to the Einstein-Maxwell-Current System with Sasakian maifolds | 16 pages, no figures | null | null | null | gr-qc math.DG | http://creativecommons.org/publicdomain/zero/1.0/ | We construct stationary solutions to the Einstein-Maxwell-current system by
using the Sasakian manifold for the three-dimensional space. Both the magnetic
field and the electric current in the solution are specified by the contact
form of the Sasakian manifold. The solutions contain an arbitrary function that
describ... | [
{
"created": "Fri, 4 Dec 2020 07:02:28 GMT",
"version": "v1"
}
] | 2020-12-07 | [
[
"Ishihara",
"Hideki",
""
],
[
"Matsuno",
"Satsuki",
""
]
] | We construct stationary solutions to the Einstein-Maxwell-current system by using the Sasakian manifold for the three-dimensional space. Both the magnetic field and the electric current in the solution are specified by the contact form of the Sasakian manifold. The solutions contain an arbitrary function that describes... |
1709.05577 | Marcos Ramirez | Marcos A. Ramirez | Vacuum thin shells in Einstein-Gauss-Bonnet brane-world cosmology | 20 pages, 5 figures | Class.Quant.Grav. 35 (2018) no.8, 085004 | 10.1088/1361-6382/aab0da | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct new solutions of the Einstein-Gauss-Bonnet field
equations in an isotropic Shiromizu-Maeda-Sasaki brane-world setting which
represent a couple of $Z_2$-symmetric vacuum thin shells splitting from the
central brane, and explore the main properties of the dynamics of the system.
The matching ... | [
{
"created": "Sat, 16 Sep 2017 22:59:50 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Feb 2018 17:51:45 GMT",
"version": "v2"
}
] | 2018-03-26 | [
[
"Ramirez",
"Marcos A.",
""
]
] | In this paper we construct new solutions of the Einstein-Gauss-Bonnet field equations in an isotropic Shiromizu-Maeda-Sasaki brane-world setting which represent a couple of $Z_2$-symmetric vacuum thin shells splitting from the central brane, and explore the main properties of the dynamics of the system. The matching of... |
1508.04943 | Oleg Evnin | Ben Craps, Oleg Evnin, Joris Vanhoof | Ultraviolet asymptotics and singular dynamics of AdS perturbations | 15 pages; v4: typos in equation (33) corrected | JHEP 1510 (2015) 079 | 10.1007/JHEP10(2015)079 | null | gr-qc hep-th nlin.CD | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Important insights into the dynamics of spherically symmetric AdS-scalar
field perturbations can be obtained by considering a simplified time-averaged
theory accurately describing perturbations of amplitude epsilon on time-scales
of order 1/epsilon^2. The coefficients of the time-averaged equations are
complicated ex... | [
{
"created": "Thu, 20 Aug 2015 10:27:17 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2015 04:47:14 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Oct 2015 05:47:01 GMT",
"version": "v3"
},
{
"created": "Thu, 12 Nov 2015 01:27:58 GMT",
"version": "v4"
}
] | 2015-11-13 | [
[
"Craps",
"Ben",
""
],
[
"Evnin",
"Oleg",
""
],
[
"Vanhoof",
"Joris",
""
]
] | Important insights into the dynamics of spherically symmetric AdS-scalar field perturbations can be obtained by considering a simplified time-averaged theory accurately describing perturbations of amplitude epsilon on time-scales of order 1/epsilon^2. The coefficients of the time-averaged equations are complicated expr... |
gr-qc/0007025 | Izumi Tanaka | T.Kawai, K. Shibata, I.Tanaka | Generalized Equivalence Principle in Extended New General Relativity | 35 pages | Prog.Theor.Phys. 104 (2000) 505-530; Erratum-ibid. 104 (2000)
1115-1116 | 10.1143/PTP.104.505 | null | gr-qc | null | In extended new general relativity, which is formulated as a reduction of
$\bar{Poincar\'e} $gauge theory of gravity whose gauge group is the covering
group of the Poincar\'e group, we study the problem of whether the total
energy-momentum, total angular momentum and total charge are equal to the
corresponding quanti... | [
{
"created": "Thu, 13 Jul 2000 04:37:52 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Dec 2000 04:12:21 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kawai",
"T.",
""
],
[
"Shibata",
"K.",
""
],
[
"Tanaka",
"I.",
""
]
] | In extended new general relativity, which is formulated as a reduction of $\bar{Poincar\'e} $gauge theory of gravity whose gauge group is the covering group of the Poincar\'e group, we study the problem of whether the total energy-momentum, total angular momentum and total charge are equal to the corresponding quantiti... |
2306.00870 | Aneta Wojnar | Eva Lope-Oter, Aneta Wojnar | Constraining Palatini gravity with GR-independent equations of state for
neutron stars | 39 pages, 20 figures, 4 tables, accepted to JCAP | JCAP 02 (2024) 017 | 10.1088/1475-7516/2024/02/017 | null | gr-qc astro-ph.HE hep-ph nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate how to construct GR-independent equations of state. We
emphasize the importance of using theory-based principles instead of relying
solely on astrophysical observables and General Relativity (GR). We build a set
of equations of state based on first principles, including chiral perturbation
theory and p... | [
{
"created": "Thu, 1 Jun 2023 16:30:05 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 2024 11:59:10 GMT",
"version": "v2"
}
] | 2024-02-12 | [
[
"Lope-Oter",
"Eva",
""
],
[
"Wojnar",
"Aneta",
""
]
] | We demonstrate how to construct GR-independent equations of state. We emphasize the importance of using theory-based principles instead of relying solely on astrophysical observables and General Relativity (GR). We build a set of equations of state based on first principles, including chiral perturbation theory and per... |
1409.4680 | Michael Coughlin | Michael Coughlin and Jan Harms | Constraining the gravitational wave energy density of the Universe in
the Range 0.1 Hz to 1 Hz using the Apollo Seismic Array | null | null | 10.1103/PhysRevD.90.102001 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we describe an analysis of Apollo era lunar seismic data that
places an upper limit on an isotropic stochastic gravitational-wave background
integrated over a year in the frequency range 0.1\,Hz -- 1\,Hz. We find that
because the Moon's ambient noise background is much quieter than that of the
Earth, s... | [
{
"created": "Tue, 16 Sep 2014 15:55:01 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Oct 2014 18:15:02 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Oct 2014 20:22:43 GMT",
"version": "v3"
}
] | 2015-06-22 | [
[
"Coughlin",
"Michael",
""
],
[
"Harms",
"Jan",
""
]
] | In this paper, we describe an analysis of Apollo era lunar seismic data that places an upper limit on an isotropic stochastic gravitational-wave background integrated over a year in the frequency range 0.1\,Hz -- 1\,Hz. We find that because the Moon's ambient noise background is much quieter than that of the Earth, sig... |
gr-qc/0602009 | Pavel Krtous | Jiri Bicak, Pavel Krtous | Fields of accelerated sources: Born in de Sitter | 37 pages, 23 figures, reformatted version of the paper published in
JMP; low-resolution figures due to arXiv size restrictions; for the version
with high-resolution figures see http://utf.mff.cuni.cz/~krtous/papers/ | J.Math.Phys. 46 (2005) 102504 | 10.1063/1.2009647 | null | gr-qc | null | This paper deals thoroughly with the scalar and electromagnetic fields of
uniformly accelerated charges in de Sitter spacetime. It gives details and
makes various extensions of our Physical Review Letter from 2002. The basic
properties of the classical Born solutions representing two uniformly
accelerated charges in ... | [
{
"created": "Thu, 2 Feb 2006 14:12:59 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bicak",
"Jiri",
""
],
[
"Krtous",
"Pavel",
""
]
] | This paper deals thoroughly with the scalar and electromagnetic fields of uniformly accelerated charges in de Sitter spacetime. It gives details and makes various extensions of our Physical Review Letter from 2002. The basic properties of the classical Born solutions representing two uniformly accelerated charges in fl... |
1506.06153 | Carlos O. Lousto | James Healy, Ian Ruchlin, Carlos O. Lousto, and Yosef Zlochower | High Energy Collisions of Black Holes Numerically Revisited | 11 pages, 10 figures | Phys. Rev. D 94, 104020 (2016) | 10.1103/PhysRevD.94.104020 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use fully nonlinear numerical relativity techniques to study high energy
head-on collision of nonspinning, equal-mass black holes to estimate the
maximum gravitational radiation emitted by these systems. Our simulations
include improvements in the construction of initial data, subsequent full
numerical evolutions,... | [
{
"created": "Fri, 19 Jun 2015 20:36:58 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Aug 2016 20:00:37 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Healy",
"James",
""
],
[
"Ruchlin",
"Ian",
""
],
[
"Lousto",
"Carlos O.",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We use fully nonlinear numerical relativity techniques to study high energy head-on collision of nonspinning, equal-mass black holes to estimate the maximum gravitational radiation emitted by these systems. Our simulations include improvements in the construction of initial data, subsequent full numerical evolutions, a... |
0905.0789 | Salvatore Antoci | Salvatore Antoci | The propagation of waves in Einstein's unified field theory as shown by
two exact solutions | 12 pages. Added footnote 6 details proof of propagation with the
fundamental velocity in the wave zone | Nuovo Cim.B124:619-630,2010 | 10.1393/ncb/i2009-10783-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The propagation of waves in two space dimensions exhibited by two exact
solutions to the field equations of Einstein's unified field theory is
investigated under the assumption that the metric s_{ik} is the one already
chosen by Kursunoglu and by H\'ely in the years 1952-1954. It is shown that,
for both exact solutio... | [
{
"created": "Wed, 6 May 2009 09:30:08 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Sep 2009 10:34:52 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Antoci",
"Salvatore",
""
]
] | The propagation of waves in two space dimensions exhibited by two exact solutions to the field equations of Einstein's unified field theory is investigated under the assumption that the metric s_{ik} is the one already chosen by Kursunoglu and by H\'ely in the years 1952-1954. It is shown that, for both exact solutions... |
1405.5334 | Prasobh C.B | C.B. Prasobh, V.C. Kuriakose | Quasinormal Modes of Lovelock Black Holes | null | null | 10.1140/epjc/s10052-014-3136-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quasinormal modes of metric perturbations in asymptotically flat black
hole spacetimes in the Lovelock model are calculated for different spacetime
dimensions and higher orders of curvature. It is analytically established that
in the asymptotic limit $l \rightarrow \infty$, the imaginary parts of the
quasi normal... | [
{
"created": "Wed, 21 May 2014 08:50:25 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Prasobh",
"C. B.",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | The quasinormal modes of metric perturbations in asymptotically flat black hole spacetimes in the Lovelock model are calculated for different spacetime dimensions and higher orders of curvature. It is analytically established that in the asymptotic limit $l \rightarrow \infty$, the imaginary parts of the quasi normal f... |
2101.00785 | Junji Jia | Haotian Liu and Junji Jia | Time delay in the strong field limit for null and timelike signals and
its simple interpretation | 24 pages, 3 figures | null | 10.1140/epjc/s10052-021-09659-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational lensing can happen not only for null signal but also timelike
signals such as neutrinos and massive gravitational waves in some theories
beyond GR. In this work we study the time delay between different relativistic
images formed by signals with arbitrary asymptotic velocity $v$ in general
static and sp... | [
{
"created": "Mon, 4 Jan 2021 05:54:47 GMT",
"version": "v1"
}
] | 2021-10-27 | [
[
"Liu",
"Haotian",
""
],
[
"Jia",
"Junji",
""
]
] | Gravitational lensing can happen not only for null signal but also timelike signals such as neutrinos and massive gravitational waves in some theories beyond GR. In this work we study the time delay between different relativistic images formed by signals with arbitrary asymptotic velocity $v$ in general static and sphe... |
gr-qc/0309038 | Alessandro D. A. M. Spallicci | Marco Ferraris (1), Alessandro D.A.M. Spallicci (2) ((1) Dip.
Matematica, Univ. di Torino, (2) Observatoire de la Cote d'Azur, Nice) | Solutions of all one-dimensional wave equations with time independent
potential and separable variables | 10 pages, 1 figure. Accepted by Gen. Rel. Grav. J. | Gen.Rel.Grav. 36 (2004) 1955-1963 | 10.1023/B:GERG.0000036053.75204.a2 | null | gr-qc math-ph math.AP math.MP | null | Exact solutions, in terms of special functions, of all wave equations $%
u_{xx} - u_{tt} = V(x) u(t,x)$, characterised by eight inequivalent time
independent potentials and by variable separation, have been found. The real
valueness of the solutions from computer algebra programs is not always
manifest and in this wo... | [
{
"created": "Sun, 7 Sep 2003 08:37:53 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jan 2004 13:55:15 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Ferraris",
"Marco",
""
],
[
"Spallicci",
"Alessandro D. A. M.",
""
]
] | Exact solutions, in terms of special functions, of all wave equations $% u_{xx} - u_{tt} = V(x) u(t,x)$, characterised by eight inequivalent time independent potentials and by variable separation, have been found. The real valueness of the solutions from computer algebra programs is not always manifest and in this work... |
2208.10260 | Ernesto Contreras | E. Contreras, E. Fuenmayor, G. Abell\'an | Uncharged and charged anisotropic like--Durgapal stellar model with
vanishing complexity | null | Eur. Phys. J. C 82, 187 (2022) | 10.1140/epjc/s10052-022-10154-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we use the vanishing complexity factor as a supplementary
condition to construct uncharged and charged like--Durgapal models. We provide
the $g_{tt}$ component of the metric of the well-known Durgapal IV and V
solutions and a particular form for the anisotropy, related to the electric
charge, to close th... | [
{
"created": "Thu, 18 Aug 2022 20:34:35 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Contreras",
"E.",
""
],
[
"Fuenmayor",
"E.",
""
],
[
"Abellán",
"G.",
""
]
] | In this work we use the vanishing complexity factor as a supplementary condition to construct uncharged and charged like--Durgapal models. We provide the $g_{tt}$ component of the metric of the well-known Durgapal IV and V solutions and a particular form for the anisotropy, related to the electric charge, to close the ... |
2310.06876 | Telem Ibungochouba Singh | Y. Onika Laxmi, Ningthoujam Media and T. Ibungochouba Singh | P-v criticality of charged Reissner-Nordstr{\"o}m-de Sitter black hole
under the influence of Lorentz violation theory | null | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the modified Hawking radiation and the P-v criticality of
Reissner-Nordstr{\"o}m-de Sitter (RNdS) black hole are investigated by using
Dirac equation with Lorentz violation theory in curved space time. Taking
cosmological constant as the thermodynamic pressure and its conjugate quantity
as thermodynami... | [
{
"created": "Tue, 10 Oct 2023 04:33:46 GMT",
"version": "v1"
}
] | 2023-10-12 | [
[
"Laxmi",
"Y. Onika",
""
],
[
"Media",
"Ningthoujam",
""
],
[
"Singh",
"T. Ibungochouba",
""
]
] | In this paper, the modified Hawking radiation and the P-v criticality of Reissner-Nordstr{\"o}m-de Sitter (RNdS) black hole are investigated by using Dirac equation with Lorentz violation theory in curved space time. Taking cosmological constant as the thermodynamic pressure and its conjugate quantity as thermodynamic ... |
gr-qc/0101021 | Marc Mars | Marc Mars | The Wahlquist-Newman solution | LaTeX, 18 pages, no figures. Accepted for publication in Phys. Rev. D | Phys.Rev. D63 (2001) 064022 | 10.1103/PhysRevD.63.064022 | null | gr-qc | null | Based on a geometrical property which holds both for the Kerr metric and for
the Wahlquist metric we argue that the Kerr metric is a vacuum subcase of the
Wahlquist perfect-fluid solution. The Kerr-Newman metric is a physically
preferred charged generalization of the Kerr metric. We discuss which geometric
property m... | [
{
"created": "Fri, 5 Jan 2001 15:29:35 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Mars",
"Marc",
""
]
] | Based on a geometrical property which holds both for the Kerr metric and for the Wahlquist metric we argue that the Kerr metric is a vacuum subcase of the Wahlquist perfect-fluid solution. The Kerr-Newman metric is a physically preferred charged generalization of the Kerr metric. We discuss which geometric property mak... |
0808.2510 | Jeffrey Kaplan | Jeffrey D. Kaplan, David A. Nichols, and Kip S. Thorne | Post-Newtonian Approximation in Maxwell-Like Form | v4: Revised for resubmission to Phys Rev D, 6 pages. v3: Reformulated
in terms of DSX papers. Submitted to Phys Rev D, 6 pages. v2: Added
references. Changed definitions & conventions | Phys.Rev.D80:124014,2009 | 10.1103/PhysRevD.80.124014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equations of the linearized first post-Newtonian approximation to general
relativity are often written in "gravitoelectromagnetic" Maxwell-like form,
since that facilitates physical intuition. Damour, Soffel and Xu (DSX) (as a
side issue in their complex but elegant papers on relativistic celestial
mechanics) hav... | [
{
"created": "Tue, 19 Aug 2008 00:21:27 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Sep 2008 21:34:01 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Feb 2009 20:55:54 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Sep 2009 20:51:58 GMT",
"version": "v4"
}
] | 2012-12-13 | [
[
"Kaplan",
"Jeffrey D.",
""
],
[
"Nichols",
"David A.",
""
],
[
"Thorne",
"Kip S.",
""
]
] | The equations of the linearized first post-Newtonian approximation to general relativity are often written in "gravitoelectromagnetic" Maxwell-like form, since that facilitates physical intuition. Damour, Soffel and Xu (DSX) (as a side issue in their complex but elegant papers on relativistic celestial mechanics) have ... |
2007.10116 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | Simply rotating higher dimensional black holes in Einstein-Gauss-Bonnet
theory | 12 pages, 1 figure | Phys. Rev. D 102, 084030 (2020) | 10.1103/PhysRevD.102.084030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using perturbative expansion in terms of powers of the rotation parameter $a$
we construct the axisymmetric and asymptotically flat black-hole metric in the
$D$-dimensional Einstein-Gauss-Bonnet theory. In five-dimensional spacetime we
find two solutions to the field equations, describing the asymptotically flat
blac... | [
{
"created": "Sun, 12 Jul 2020 21:53:03 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Oct 2020 17:52:58 GMT",
"version": "v2"
}
] | 2020-10-15 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | Using perturbative expansion in terms of powers of the rotation parameter $a$ we construct the axisymmetric and asymptotically flat black-hole metric in the $D$-dimensional Einstein-Gauss-Bonnet theory. In five-dimensional spacetime we find two solutions to the field equations, describing the asymptotically flat black ... |
gr-qc/9912036 | Wang Mian | Mian Wang | The Scalar-Tensor Inflationary Cosmology | 17 pages, LaTex, no figure, changed some parameters and the tables | Phys.Rev. D61 (2000) 123511 | 10.1103/PhysRevD.61.123511 | null | gr-qc astro-ph hep-ph | null | In this paper the scalar-tensor theory of gravity is assumed to describe the
evolution of the universe and the gravitational scalar $\phi$ is ascribed to
play the role of inflaton. The theory is characterized by the specified
coupling function $\omega(\phi)$ and the cosmological function $\lambda(\phi)$.
The function... | [
{
"created": "Fri, 10 Dec 1999 08:09:30 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Mar 2000 14:09:08 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Wang",
"Mian",
""
]
] | In this paper the scalar-tensor theory of gravity is assumed to describe the evolution of the universe and the gravitational scalar $\phi$ is ascribed to play the role of inflaton. The theory is characterized by the specified coupling function $\omega(\phi)$ and the cosmological function $\lambda(\phi)$. The function $... |
gr-qc/0202002 | Gil de Oliveira-Neto | G. Oliveira-Neto | Naked singularities in three-dimensions | Revtex version, 11 pages and 1 eps figure | Int.J.Mod.Phys.D12:791-800,2003 | 10.1142/S0218271803003335 | null | gr-qc | null | We study an analytical solution to the Einstein's equations in
2+1-dimensions, representing the self-similar collapse of a circularly
symmetric, minimally coupled, massless, scalar field. Depending on the value of
certain parameters, this solution represents the formation of naked
singularities. Since our solution is... | [
{
"created": "Fri, 1 Feb 2002 17:57:19 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Oliveira-Neto",
"G.",
""
]
] | We study an analytical solution to the Einstein's equations in 2+1-dimensions, representing the self-similar collapse of a circularly symmetric, minimally coupled, massless, scalar field. Depending on the value of certain parameters, this solution represents the formation of naked singularities. Since our solution is a... |
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