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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0901.1628 | Larne Pekowsky | Michael Boyle, Duncan A. Brown, Larne Pekowsky | Comparison of high-accuracy numerical simulations of black-hole binaries
with stationary phase post-Newtonian template waveforms for Initial and
Advanced LIGO | 20 pages, 11 figures. Presented at NRDA 2008 | Class.Quant.Grav.26:114006,2009 | 10.1088/0264-9381/26/11/114006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effectiveness of stationary-phase approximated post-Newtonian
waveforms currently used by ground-based gravitational-wave detectors to search
for the coalescence of binary black holes by comparing them to an accurate
waveform obtained from numerical simulation of an equal-mass non-spinning
binary black h... | [
{
"created": "Mon, 12 Jan 2009 17:58:37 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jan 2009 02:52:31 GMT",
"version": "v2"
}
] | 2009-06-10 | [
[
"Boyle",
"Michael",
""
],
[
"Brown",
"Duncan A.",
""
],
[
"Pekowsky",
"Larne",
""
]
] | We study the effectiveness of stationary-phase approximated post-Newtonian waveforms currently used by ground-based gravitational-wave detectors to search for the coalescence of binary black holes by comparing them to an accurate waveform obtained from numerical simulation of an equal-mass non-spinning binary black hol... |
1703.01415 | Sabine Hossenfelder | S. Hossenfelder | A Covariant Version of Verlinde's Emergent Gravity | correction and reference added. 15 pages, no figures | Phys. Rev. D 95, 124018 (2017) | 10.1103/PhysRevD.95.124018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generally covariant version of Erik Verlinde's emergent gravity model is
proposed. The Lagrangian constructed here allows an improved interpretation of
the underlying mechanism. It suggests that de-Sitter space is filled with a
vector-field that couples to baryonic matter and, by dragging on it, creates an
effect s... | [
{
"created": "Sat, 4 Mar 2017 08:40:27 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Mar 2017 15:43:23 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jun 2017 06:43:15 GMT",
"version": "v3"
}
] | 2017-06-28 | [
[
"Hossenfelder",
"S.",
""
]
] | A generally covariant version of Erik Verlinde's emergent gravity model is proposed. The Lagrangian constructed here allows an improved interpretation of the underlying mechanism. It suggests that de-Sitter space is filled with a vector-field that couples to baryonic matter and, by dragging on it, creates an effect sim... |
1512.03095 | Sergio Ulhoa | S.C. Ulhoa | On the Quantization of the Charge-Mass Ratio | null | Gen Relativ Gravit (2017) 49: 3 | 10.1007/s10714-016-2170-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper deals with the problem of describing fundamental particles. The
Einstein-Rosen approach was revisited to explain que charge-mass ratio
quantization. Such a result is obtained once a quantization prescription is
applied to the expression of gravitational energy defined in the realm of
teleparallel gravity.
| [
{
"created": "Sat, 5 Dec 2015 23:19:29 GMT",
"version": "v1"
}
] | 2016-12-02 | [
[
"Ulhoa",
"S. C.",
""
]
] | The paper deals with the problem of describing fundamental particles. The Einstein-Rosen approach was revisited to explain que charge-mass ratio quantization. Such a result is obtained once a quantization prescription is applied to the expression of gravitational energy defined in the realm of teleparallel gravity. |
gr-qc/9307016 | Ulvi Yurtsever | Ulvi Yurtsever | The origin of spacetime topology and generalizations of quantum field
theory | 23 pages, UCSBTH-92-45 | Class.Quant.Grav.11:1013-1026,1994 | 10.1088/0264-9381/11/4/017 | null | gr-qc | null | The research effort reported in this paper is directed, in a broad sense,
towards understanding the small-scale structure of spacetime. The fundamental
question that guides our discussion is ``what is the physical content of
spacetime topology?" In classical physics, if spacetime, $(X, \tau )$, has
sufficiently regul... | [
{
"created": "Wed, 14 Jul 1993 01:32:07 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Yurtsever",
"Ulvi",
""
]
] | The research effort reported in this paper is directed, in a broad sense, towards understanding the small-scale structure of spacetime. The fundamental question that guides our discussion is ``what is the physical content of spacetime topology?" In classical physics, if spacetime, $(X, \tau )$, has sufficiently regular... |
gr-qc/0207083 | Metin Gurses | Metin Gurses (Bilkent University) and Ozgur Sarioglu (METU) | Accelerated Born-Infeld Metrics in Kerr-Schild Geometry | Latex file (12 pp) | Class.Quant.Grav. 20 (2003) 351-358 | 10.1088/0264-9381/20/2/308 | null | gr-qc hep-th | null | We consider Einstein Born-Infeld theory with a null fluid in Kerr-Schild
Geometry. We find accelerated charge solutions of this theory. Our solutions
reduce to the Plebanski solution when the acceleration vanishes and to the
Bonnor-Vaidya solution as the Born-Infeld parameter b goes to infinity. We also
give the expl... | [
{
"created": "Mon, 22 Jul 2002 08:36:18 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gurses",
"Metin",
"",
"Bilkent University"
],
[
"Sarioglu",
"Ozgur",
"",
"METU"
]
] | We consider Einstein Born-Infeld theory with a null fluid in Kerr-Schild Geometry. We find accelerated charge solutions of this theory. Our solutions reduce to the Plebanski solution when the acceleration vanishes and to the Bonnor-Vaidya solution as the Born-Infeld parameter b goes to infinity. We also give the explic... |
0711.2170 | Carsten Gundlach | Carsten Gundlach | Summary of GR18 Numerical Relativity parallel sessions (B1/B2 and B2),
Sydney, 8-13 July 2007 | References updated, to be published in CQG | Class.Quant.Grav.25:114019,2008 | 10.1088/0264-9381/25/11/114019 | null | gr-qc | null | The numerical relativity session at GR18 was dominated by physics results on
binary black hole mergers. Several groups can now simulate these from a time
when the post-Newtonian equations of motion are still applicable, through
several orbits and the merger to the ringdown phase, obtaining plausible
gravitational wav... | [
{
"created": "Wed, 14 Nov 2007 11:42:51 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jan 2008 10:46:20 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gundlach",
"Carsten",
""
]
] | The numerical relativity session at GR18 was dominated by physics results on binary black hole mergers. Several groups can now simulate these from a time when the post-Newtonian equations of motion are still applicable, through several orbits and the merger to the ringdown phase, obtaining plausible gravitational waves... |
1208.3038 | Aaron Zimmerman | David A. Nichols, Aaron Zimmerman, Yanbei Chen, Geoffrey Lovelace,
Keith D. Matthews, Robert Owen, Fan Zhang, Kip S. Thorne | Visualizing Spacetime Curvature via Frame-Drag Vortexes and Tidal
Tendexes III. Quasinormal Pulsations of Schwarzschild and Kerr Black Holes | 53 pages with an overview of major results in the first 11 pages, 26
figures. v2: Very minor changes to reflect published version. v3: Fixed Ref 7 | Phys. Rev. D 86, 104028 (2012) | 10.1103/PhysRevD.86.104028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent papers, we and colleagues have introduced a way to visualize the
full vacuum Riemann curvature tensor using frame-drag vortex lines and their
vorticities, and tidal tendex lines and their tendicities. We have also
introduced the concepts of horizon vortexes and tendexes and 3-D vortexes and
tendexes (region... | [
{
"created": "Wed, 15 Aug 2012 06:20:27 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Dec 2012 22:41:41 GMT",
"version": "v2"
},
{
"created": "Thu, 31 Jan 2013 16:27:40 GMT",
"version": "v3"
}
] | 2015-03-20 | [
[
"Nichols",
"David A.",
""
],
[
"Zimmerman",
"Aaron",
""
],
[
"Chen",
"Yanbei",
""
],
[
"Lovelace",
"Geoffrey",
""
],
[
"Matthews",
"Keith D.",
""
],
[
"Owen",
"Robert",
""
],
[
"Zhang",
"Fan",
""
],
[
... | In recent papers, we and colleagues have introduced a way to visualize the full vacuum Riemann curvature tensor using frame-drag vortex lines and their vorticities, and tidal tendex lines and their tendicities. We have also introduced the concepts of horizon vortexes and tendexes and 3-D vortexes and tendexes (regions ... |
1502.04626 | Azam Izadi | Azam Izadi and Shadi Sajedi Shacker | Studying the Supernova luminosity distance in Palatini formalism
considering the role of causal structure constant | 17 pages, 3 figures. arXiv admin note: text overlap with
arXiv:0811.2832 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The speed of light is a complicated synthesizer quantity with distinctive
origins which lead to coincident values in the standard theory. Due to the fact
that different aspects of speed of light do not coincide in the local inertial
frame for different Palatini modified gravity theories, when deviating from
general r... | [
{
"created": "Fri, 13 Feb 2015 11:45:15 GMT",
"version": "v1"
}
] | 2015-02-17 | [
[
"Izadi",
"Azam",
""
],
[
"Shacker",
"Shadi Sajedi",
""
]
] | The speed of light is a complicated synthesizer quantity with distinctive origins which lead to coincident values in the standard theory. Due to the fact that different aspects of speed of light do not coincide in the local inertial frame for different Palatini modified gravity theories, when deviating from general rel... |
1406.6551 | Maciej Wielgus | Maciek Wielgus, George F. R. Ellis, Frederic H. Vincent and Marek A.
Abramowicz | Cosmic background radiation in the vicinity of a Schwarzschild black
hole: no classic firewall | 18 pages, 4 figures, accepted for publication in Phys. Rev. D | Phys. Rev. D 90, 124024 (2014) | 10.1103/PhysRevD.90.124024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Cosmic Blackbody Background Radiation pervades the entire Universe, and
so falls into every astrophysical black hole. The blueshift of the infalling
photons, measured by a static observer, is infinite at the event horizon. This
raises a question as to whether a "firewall" of high energy density may form
just outs... | [
{
"created": "Wed, 25 Jun 2014 12:53:01 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Nov 2014 14:18:53 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Dec 2014 14:28:45 GMT",
"version": "v3"
}
] | 2014-12-16 | [
[
"Wielgus",
"Maciek",
""
],
[
"Ellis",
"George F. R.",
""
],
[
"Vincent",
"Frederic H.",
""
],
[
"Abramowicz",
"Marek A.",
""
]
] | The Cosmic Blackbody Background Radiation pervades the entire Universe, and so falls into every astrophysical black hole. The blueshift of the infalling photons, measured by a static observer, is infinite at the event horizon. This raises a question as to whether a "firewall" of high energy density may form just outsid... |
2109.01398 | Guillem Dom\`enech | Guillem Dom\`enech | Scalar induced gravitational waves review | Invited review for universe. 97 pages. 10 figures. Matches published
version | Universe 7 (2021) 11, 398 | 10.3390/universe7110398 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a review on the state-of-the-art of gravitational waves induced by
primordial fluctuations, so-called induced gravitational waves. We present the
intuitive physics behind induced gravitational waves and we revisit and unify
the general analytical formulation. We then present general formulas in a
compact f... | [
{
"created": "Fri, 3 Sep 2021 09:44:21 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Nov 2021 08:11:41 GMT",
"version": "v2"
}
] | 2021-11-08 | [
[
"Domènech",
"Guillem",
""
]
] | We provide a review on the state-of-the-art of gravitational waves induced by primordial fluctuations, so-called induced gravitational waves. We present the intuitive physics behind induced gravitational waves and we revisit and unify the general analytical formulation. We then present general formulas in a compact for... |
gr-qc/9611014 | Shuhei Mano | Shuhei Mano and Eiichi Takasugi | Analytic Solutions of the Teukolsky Equation and their Properties | 28 pages | Prog.Theor.Phys. 97 (1997) 213-232 | 10.1143/PTP.97.213 | null | gr-qc | null | The analytical solutions reported in our previous paper are given as series
of hypergeometric or Coulomb wave functions. By using them, we can get the
Teukolsky functions analytically in a desired accuracy. For the computation,
the deep understanding of their properties is necessary. We summarize the main
result: The... | [
{
"created": "Wed, 6 Nov 1996 10:05:33 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Mano",
"Shuhei",
""
],
[
"Takasugi",
"Eiichi",
""
]
] | The analytical solutions reported in our previous paper are given as series of hypergeometric or Coulomb wave functions. By using them, we can get the Teukolsky functions analytically in a desired accuracy. For the computation, the deep understanding of their properties is necessary. We summarize the main result: The r... |
2301.01692 | Sergei Vergeles | S. N. Vergeles | Phase transition near the Big Bang in the lattice theory of gravity and
some cosmological considerations | 15 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Lattice regularization of the theory of gravity provides a new possibility
for study of the Big Bang problem. Moreover, the very possibility of studying
the state of the Universe at the highest temperatures appears. In the 2D and 4D
lattice theories of gravity, the existence of a high-temperature phase is
proved, whi... | [
{
"created": "Tue, 3 Jan 2023 08:30:00 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Mar 2023 14:39:37 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Apr 2023 11:26:39 GMT",
"version": "v3"
},
{
"created": "Tue, 2 May 2023 09:28:23 GMT",
"version": "v4"
},
{
"cre... | 2024-06-28 | [
[
"Vergeles",
"S. N.",
""
]
] | Lattice regularization of the theory of gravity provides a new possibility for study of the Big Bang problem. Moreover, the very possibility of studying the state of the Universe at the highest temperatures appears. In the 2D and 4D lattice theories of gravity, the existence of a high-temperature phase is proved, which... |
1110.5756 | Francisco Lobo | Christian G. Boehmer, Tiberiu Harko, Francisco S. N. Lobo | Wormhole geometries in modified teleparralel gravity and the energy
conditions | 8 pages, 4 figures. V2: major revision, discussion added; to appear
in PRD | Phys.Rev.D85:044033,2012 | 10.1103/PhysRevD.85.044033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore the possibility that static and spherically
symmetric traversable wormhole geometries are supported by modified
teleparallel gravity or f(T) gravity, where T is the torsion scalar.
Considering the field equations with an off-diagonal tetrad, a plethora of
asymptotically flat exact solutions a... | [
{
"created": "Wed, 26 Oct 2011 10:14:11 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Jan 2012 22:11:27 GMT",
"version": "v2"
}
] | 2012-02-16 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | In this work, we explore the possibility that static and spherically symmetric traversable wormhole geometries are supported by modified teleparallel gravity or f(T) gravity, where T is the torsion scalar. Considering the field equations with an off-diagonal tetrad, a plethora of asymptotically flat exact solutions are... |
1611.00619 | Ahmida Bendjoudi | A. Bendjoudi and N. Mebarki | The Quantum Trihedron | 3 pages, 2 figures | CHIN. PHYS. LETT. Vol. 33, No. 11 (2016) 110401 | 10.1088/0256-307X/33/11/110401 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The convex hull on three points in two dimensional euclidean space of three
flat edges (trihedron) was studied. The Bohr-Sommerfeld quantization of the
area of space is performed. It is shown that it reproduces exactly the
equidistant spacing spectrum found elsewhere.
| [
{
"created": "Tue, 1 Nov 2016 17:25:58 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Bendjoudi",
"A.",
""
],
[
"Mebarki",
"N.",
""
]
] | The convex hull on three points in two dimensional euclidean space of three flat edges (trihedron) was studied. The Bohr-Sommerfeld quantization of the area of space is performed. It is shown that it reproduces exactly the equidistant spacing spectrum found elsewhere. |
0709.2741 | Stefano Ansoldi | Stefano Ansoldi | Vacuum and semiclassical gravity: a difficulty and its bewildering
significance | 11 pages, LaTeX, 4 figure; talk given at the workshop "From Quantum
to Emergent Gravity: Theory and Phenomenology", June, 11-15 2007, Trieste,
Italy (http://www.sissa.it/app/QGconference); submitted to the "Proceedings
of Science" (http://pos.sissa.it) | PoSQG-Ph:004,2007 | null | KUNS-2094 | gr-qc hep-th | null | We review a long-standing difficulty in some semiclassical models of vacuum
and vacuum decay. Surprisingly enough these models, careless of their
transparent formulation, are affected by, both, technical and conceptual
issues. After proving some general results that are relevant for, both, the
Euclidean and Lorentzia... | [
{
"created": "Tue, 18 Sep 2007 01:44:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ansoldi",
"Stefano",
""
]
] | We review a long-standing difficulty in some semiclassical models of vacuum and vacuum decay. Surprisingly enough these models, careless of their transparent formulation, are affected by, both, technical and conceptual issues. After proving some general results that are relevant for, both, the Euclidean and Lorentzian ... |
1405.6597 | Seyed Meraj Mousavi Rasouli | S. M. M. Rasouli | Kasner Solution in Brans-Dicke Theory and its Corresponding Reduced
Cosmology | 4 pages, Contribution to the Spanish Relativity Meeting in Portugal,
September 3-7, 2012 (ERE2012), Guimaraes, Portugal | Springer Proc. in Math. & Statist. 60, 371 (2014) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a brief review of the modified Brans-Dicke theory (MBDT) in
arbitrary dimensions, whereby the ($N+1$)-dimensional field equations reduce to
the $N$-dimensional $(ND)$ configuration with sources and an effective induced
scalar potential. We then investigate a generalized Bianchi type~I anisotropic
cosmology... | [
{
"created": "Mon, 26 May 2014 14:52:53 GMT",
"version": "v1"
}
] | 2014-05-27 | [
[
"Rasouli",
"S. M. M.",
""
]
] | We present a brief review of the modified Brans-Dicke theory (MBDT) in arbitrary dimensions, whereby the ($N+1$)-dimensional field equations reduce to the $N$-dimensional $(ND)$ configuration with sources and an effective induced scalar potential. We then investigate a generalized Bianchi type~I anisotropic cosmology i... |
2303.01910 | Ekrem Demirbo\u{g}a | Ekrem S. Demirbo\u{g}a, Yakup Emre \c{S}ahin, Fethi M. Ramazano\u{g}lu | Subtleties in constraining gravity theories with mass-radius data | 18 pages, 11 figures. Published version. A larger dataset was used in
the analysis and a chapter explaining the effect of the dataset size is added
in this version | null | 10.1103/PhysRevD.108.024028 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Simultaneous measurements of neutron star masses and radii can be used to
constrain deviations from general relativity (GR) as was recently demonstrated
for the spontaneous scalarization model of Damour and Esposito-Far\`{e}se
(DEF). Here, we investigate the general applicability of the same procedure
beyond this sin... | [
{
"created": "Fri, 3 Mar 2023 13:23:33 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jul 2023 16:17:16 GMT",
"version": "v2"
}
] | 2023-07-24 | [
[
"Demirboğa",
"Ekrem S.",
""
],
[
"Şahin",
"Yakup Emre",
""
],
[
"Ramazanoğlu",
"Fethi M.",
""
]
] | Simultaneous measurements of neutron star masses and radii can be used to constrain deviations from general relativity (GR) as was recently demonstrated for the spontaneous scalarization model of Damour and Esposito-Far\`{e}se (DEF). Here, we investigate the general applicability of the same procedure beyond this singl... |
0707.1667 | Sergiu Vacaru I. | Sergiu I. Vacaru | Deformation Quantization of Nonholonomic Almost Kahler Models and
Einstein Gravity | latex 2e, 11pt, 15 pages, v4 accepted by Phys. Lett. A | Phys.Lett.A372:2949-2955,2008 | 10.1016/j.physleta.2008.01.044 | null | gr-qc hep-th math-ph math.MP math.SG | null | Nonholonomic distributions and adapted fame structures on (pseudo) Riemannian
manifolds of even dimension are employed to build structures equivalent to
almost Kahler geometry and which allows to perform a Fedosov-like quantization
of gravity. The nonlinear connection formalism that was formally elaborated for
Lagran... | [
{
"created": "Wed, 11 Jul 2007 17:13:20 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jul 2007 17:45:11 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Jul 2007 20:23:25 GMT",
"version": "v3"
},
{
"created": "Thu, 10 Jan 2008 20:58:07 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | Nonholonomic distributions and adapted fame structures on (pseudo) Riemannian manifolds of even dimension are employed to build structures equivalent to almost Kahler geometry and which allows to perform a Fedosov-like quantization of gravity. The nonlinear connection formalism that was formally elaborated for Lagrange... |
gr-qc/0401022 | Luis Herrera | L.Herrera, G. Le Denmat, N.O. Santos and A. Wang | Shear-free radiating collapse and conformal flatness | 13 pages Latex. Some misprints in eqs.(17), (30) and (35) have been
corrected | Int.J.Mod.Phys.D13:583-592,2004 | 10.1142/S0218271804004840 | null | gr-qc astro-ph | null | Here we study some general properties of spherical shear-free collapse. Its
general solution when imposing conformal flatness is reobtained [1,2] and
matched to the outgoing Vaidya spacetime. We propose a simple model satisfying
these conditions and study its physical consequences. Special attention
deserve, the role... | [
{
"created": "Wed, 7 Jan 2004 18:54:00 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2005 20:08:55 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Herrera",
"L.",
""
],
[
"Denmat",
"G. Le",
""
],
[
"Santos",
"N. O.",
""
],
[
"Wang",
"A.",
""
]
] | Here we study some general properties of spherical shear-free collapse. Its general solution when imposing conformal flatness is reobtained [1,2] and matched to the outgoing Vaidya spacetime. We propose a simple model satisfying these conditions and study its physical consequences. Special attention deserve, the role p... |
1501.05832 | David Ian Jones | D. I. Jones | Parameter choices and ranges for continuous gravitational wave searches
for steadily spinning neutron stars | Updated to match version accepted by MNRAS: One new equation
(equation 82)); typo (sign-error) corrected in equation (88); one more
paragraph inserted into Summary and Discussion section | null | 10.1093/mnras/stv1584 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the issue of selecting parameters and their associated ranges for
carrying out searches for continuous gravitational waves from steadily rotating
neutron stars. We consider three different cases (i) the "classic" case of a
star spinning about a principal axis; (ii) a biaxial star, not spinning about a
pri... | [
{
"created": "Fri, 23 Jan 2015 15:32:14 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jul 2015 10:33:09 GMT",
"version": "v2"
}
] | 2015-08-19 | [
[
"Jones",
"D. I.",
""
]
] | We consider the issue of selecting parameters and their associated ranges for carrying out searches for continuous gravitational waves from steadily rotating neutron stars. We consider three different cases (i) the "classic" case of a star spinning about a principal axis; (ii) a biaxial star, not spinning about a princ... |
gr-qc/0402017 | Gaetano Vilasi | Fabrizio Canfora and Gaetano Vilasi | Back Reaction from Trace Anomaly in RN-blackholes Evaporation | 16 pages Latex | JHEP 0312:055,2003 | 10.1088/1126-6708/2003/12/055 | null | gr-qc | null | A model is proposed to describe a transition from a charged black hole of
mass $M$ and charge $Q$ to one of mass $\bar{M}$ and charge $\bar{Q}$. The
basic equations are derived from the non-vacuum Einstein field equations
sourced by the Coulomb field and by a null scalar field with a nonvanishing
trace anomaly. It is... | [
{
"created": "Tue, 3 Feb 2004 21:14:44 GMT",
"version": "v1"
}
] | 2010-01-15 | [
[
"Canfora",
"Fabrizio",
""
],
[
"Vilasi",
"Gaetano",
""
]
] | A model is proposed to describe a transition from a charged black hole of mass $M$ and charge $Q$ to one of mass $\bar{M}$ and charge $\bar{Q}$. The basic equations are derived from the non-vacuum Einstein field equations sourced by the Coulomb field and by a null scalar field with a nonvanishing trace anomaly. It is s... |
2407.19800 | Pankaj Sheoran | Tursunali Xamidov, Sanjar Shaymatov, Pankaj Sheoran and Bobomurat
Ahmedov | Astrophysical insights into magnetic Penrose process around
parameterized Konoplya-Rezzolla-Zhidenko black hole | 12 pages, 4 captioned figures and 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we investigate the parameterized Konoplya-Rezzolla-Zhidenko
(KRZ) black hole (BH) spacetime in the presence of an external asymptotically
uniform magnetic field. We first examine the innermost stable circular orbit
(ISCO) radii for both neutral and charged test particles, demonstrating that
the deforma... | [
{
"created": "Mon, 29 Jul 2024 08:48:25 GMT",
"version": "v1"
}
] | 2024-07-30 | [
[
"Xamidov",
"Tursunali",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Sheoran",
"Pankaj",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | In this study, we investigate the parameterized Konoplya-Rezzolla-Zhidenko (KRZ) black hole (BH) spacetime in the presence of an external asymptotically uniform magnetic field. We first examine the innermost stable circular orbit (ISCO) radii for both neutral and charged test particles, demonstrating that the deformati... |
gr-qc/0403096 | Hernando Quevedo | Hernando Quevedo and Ruben D. Zarate | Reply to the Comment ``On the thermodynamics of inhomogeneous perfect
fluid mixtures'' | null | null | null | null | gr-qc | null | We show that the analysis presented in a recent comment by Coll and Ferrando
\cite{comment} (qr-qc/0312058) is based on the erroneous assumption that the
chemical potential and fractional concentration of a {\it mixture} of perfect
fluids are unknown variables.
| [
{
"created": "Tue, 23 Mar 2004 21:00:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Quevedo",
"Hernando",
""
],
[
"Zarate",
"Ruben D.",
""
]
] | We show that the analysis presented in a recent comment by Coll and Ferrando \cite{comment} (qr-qc/0312058) is based on the erroneous assumption that the chemical potential and fractional concentration of a {\it mixture} of perfect fluids are unknown variables. |
1802.03672 | Phongpichit Channuie | Phongpichit Channuie (Walailak U.), Davood Momeni (Sultan Qaboos U.) | On the Scalar-Vector-Tensor Gravity: Black Hole, Thermodynamics and
Geometrothermodynamics | v2: 8 pages, 4 figures, texts modified and references added, version
accepted by Physics Letters B | Physics Letters B785 (2018) 309-314 | 10.1016/j.physletb.2018.08.052 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a new class of modified gravity theories formulated via an
additional scalar and vector field on top of the standard tensor field has been
proposed. The direct implications of these theories are expected to be relevant
for cosmology and astrophysics. In the present work, we revisit the modified
framework of... | [
{
"created": "Sun, 11 Feb 2018 01:00:57 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2018 14:00:26 GMT",
"version": "v2"
}
] | 2018-09-11 | [
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
],
[
"Momeni",
"Davood",
"",
"Sultan Qaboos U."
]
] | Recently, a new class of modified gravity theories formulated via an additional scalar and vector field on top of the standard tensor field has been proposed. The direct implications of these theories are expected to be relevant for cosmology and astrophysics. In the present work, we revisit the modified framework of t... |
1812.06988 | Francois Foucart | Francois Foucart, Matthew D. Duez, Tanja Hinderer, Jesus Caro, Andrew
R. Williamson, Michael Boyle, Alessandra Buonanno, Roland Haas, Daniel A.
Hemberger, Lawrence E. Kidder, Harald P. Pfeiffer, Mark A. Scheel | Gravitational waveforms from SpEC simulations : neutron star-neutron
star and low-mass black hole-neutron star binaries | 17p, 10 figures | Phys. Rev. D 99, 044008 (2019) | 10.1103/PhysRevD.99.044008 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waveforms from numerical simulations are a critical tool to
test and analytically calibrate the waveform models used to study the
properties of merging compact objects. In this paper, we present a series of
high-accuracy waveforms produced with the SpEC code for systems involving at
least one neutron st... | [
{
"created": "Mon, 17 Dec 2018 19:00:04 GMT",
"version": "v1"
}
] | 2019-02-20 | [
[
"Foucart",
"Francois",
""
],
[
"Duez",
"Matthew D.",
""
],
[
"Hinderer",
"Tanja",
""
],
[
"Caro",
"Jesus",
""
],
[
"Williamson",
"Andrew R.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Buonanno",
"Alessandra",
""... | Gravitational waveforms from numerical simulations are a critical tool to test and analytically calibrate the waveform models used to study the properties of merging compact objects. In this paper, we present a series of high-accuracy waveforms produced with the SpEC code for systems involving at least one neutron star... |
0710.0477 | Hideki Asada | Hideki Asada | Gravitational time delay of light for various models of modified gravity | 10 pages, 2 figures; title, abstract and text improved; accepted for
publication in Phys. Lett. B | Phys.Lett.B661:78-81,2008 | 10.1016/j.physletb.2008.02.006 | null | gr-qc astro-ph hep-th | null | We reexamined the gravitational time delay of light, allowing for various
models of modified gravity. We clarify the dependence of the time delay (and
induced frequency shift) on modified gravity models and investigate how to
distinguish those models, when light propagates in static spherically symmetric
spacetimes. ... | [
{
"created": "Tue, 2 Oct 2007 09:41:07 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Feb 2008 08:40:48 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Asada",
"Hideki",
""
]
] | We reexamined the gravitational time delay of light, allowing for various models of modified gravity. We clarify the dependence of the time delay (and induced frequency shift) on modified gravity models and investigate how to distinguish those models, when light propagates in static spherically symmetric spacetimes. Th... |
1602.07006 | Elias Okon | Elias Okon and Daniel Sudarsky | A (not so?) novel explanation for the very special initial state of the
universe | 12 pages; improved and extended version | null | 10.1088/0264-9381/33/22/225015 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We put forward a proposal that combines objective collapse models, developed
in connection with quantum-foundational questions, with the so-called Weyl
curvature hypothesis, introduced by Roger Penrose as an attempt to account for
the very special initial state of the universe. In particular, we explain how a
curvatu... | [
{
"created": "Tue, 23 Feb 2016 01:20:46 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Apr 2016 18:30:49 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Jun 2016 19:23:39 GMT",
"version": "v3"
}
] | 2016-11-23 | [
[
"Okon",
"Elias",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We put forward a proposal that combines objective collapse models, developed in connection with quantum-foundational questions, with the so-called Weyl curvature hypothesis, introduced by Roger Penrose as an attempt to account for the very special initial state of the universe. In particular, we explain how a curvature... |
0904.2330 | Mauro Rinaldelli | E. Minguzzi and M. Rinaldelli | Widening the light cones on subsets of spacetime: some variations to
stable causality | Latex2e, 19 pages, 1 table, 1 figure | Class.Quant.Grav.26:175004,2009 | 10.1088/0264-9381/26/17/175004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By definition a spacetime is stably causal if it is possible to widen the
light cones all over the spacetime without spoiling causality. We prove that if
the spacetime is at least non-total imprisoning then it is stably causal
provided the light cones can be widened outside any compact arbitrarily large
set, i.e. in ... | [
{
"created": "Wed, 15 Apr 2009 14:38:32 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jul 2009 15:38:26 GMT",
"version": "v2"
}
] | 2009-08-12 | [
[
"Minguzzi",
"E.",
""
],
[
"Rinaldelli",
"M.",
""
]
] | By definition a spacetime is stably causal if it is possible to widen the light cones all over the spacetime without spoiling causality. We prove that if the spacetime is at least non-total imprisoning then it is stably causal provided the light cones can be widened outside any compact arbitrarily large set, i.e. in a ... |
0907.4103 | Eugeny Babichev | E. Babichev, C. Deffayet, R. Ziour | Recovering General Relativity from massive gravity | 4 pages, 3 figures; v2: minor changes, matches published version | Phys.Rev.Lett.103:201102,2009 | 10.1103/PhysRevLett.103.201102 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain static, spherically symmetric, and asymptotically flat numerical
solutions of massive gravity with a source. Those solutions show, for the first
time explicitly, a recovery of the Schwarzschild solution of General Relativity
via the so-called Vainshtein mechanism.
| [
{
"created": "Thu, 23 Jul 2009 15:58:24 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2009 14:31:43 GMT",
"version": "v2"
}
] | 2010-04-23 | [
[
"Babichev",
"E.",
""
],
[
"Deffayet",
"C.",
""
],
[
"Ziour",
"R.",
""
]
] | We obtain static, spherically symmetric, and asymptotically flat numerical solutions of massive gravity with a source. Those solutions show, for the first time explicitly, a recovery of the Schwarzschild solution of General Relativity via the so-called Vainshtein mechanism. |
2107.00393 | Alesandro Santos | J. S. Gon\c{c}alves and A. F. Santos | G\"{o}del-type solutions in hybrid metric-Palatini gravity | 14 pages, accepted for publication in EPL | null | 10.1209/0295-5075/ac0ffd | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, the hybrid metric-Palatini gravity is an approach to modified
gravity in which is added to the usual Einstein-Hilbert action a supplementary
term containing a Palatini-type correction of the form $f({\cal R},T)$. Here,
${\cal R}$ is the Palatini curvature scalar, which is constructed from an
independen... | [
{
"created": "Thu, 1 Jul 2021 12:12:10 GMT",
"version": "v1"
}
] | 2022-03-30 | [
[
"Gonçalves",
"J. S.",
""
],
[
"Santos",
"A. F.",
""
]
] | In this paper, the hybrid metric-Palatini gravity is an approach to modified gravity in which is added to the usual Einstein-Hilbert action a supplementary term containing a Palatini-type correction of the form $f({\cal R},T)$. Here, ${\cal R}$ is the Palatini curvature scalar, which is constructed from an independent ... |
1904.02247 | Madhavan Varadarajan | Madhavan Varadarajan | On quantum propagation in Smolin's weak coupling limit of 4d Euclidean
Gravity | 38 pages, 9 figures | Phys. Rev. D 100, 066018 (2019) | 10.1103/PhysRevD.100.066018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two desireable properties of a quantum dynamics for Loop Quantum Gravity
(LQG) are that its generators provide an anomaly free representation of the
classical constraint algebra and that physical states which lie in the kernel
of these generators encode propagation. A physical state in LQG is expected to
be a sum ove... | [
{
"created": "Wed, 3 Apr 2019 21:42:25 GMT",
"version": "v1"
}
] | 2019-09-25 | [
[
"Varadarajan",
"Madhavan",
""
]
] | Two desireable properties of a quantum dynamics for Loop Quantum Gravity (LQG) are that its generators provide an anomaly free representation of the classical constraint algebra and that physical states which lie in the kernel of these generators encode propagation. A physical state in LQG is expected to be a sum over ... |
gr-qc/9312020 | Jose Rubio | J.A. Rubio and R.P. Woodard | Reduced Hamiltonians | 80 pages, Univesity of Florida preprint UFIFT-93-20 | Class.Quant.Grav.11:2253-2281,1994 | 10.1088/0264-9381/11/9/009 | null | gr-qc | null | We resurrect a standard construction of analytical mechanics dating from the
last century. The technique allows one to pass from any dynamical system whose
first order evolution equations are known, and whose bracket algebra is not
degenerate, to a system of canonical variables and a non-zero Hamiltonian that
generat... | [
{
"created": "Mon, 13 Dec 1993 13:45:02 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Rubio",
"J. A.",
""
],
[
"Woodard",
"R. P.",
""
]
] | We resurrect a standard construction of analytical mechanics dating from the last century. The technique allows one to pass from any dynamical system whose first order evolution equations are known, and whose bracket algebra is not degenerate, to a system of canonical variables and a non-zero Hamiltonian that generates... |
gr-qc/0411115 | Kerstin E. Kunze | Kerstin E. Kunze | Asymptotic behaviour of curvature and matter in the Penrose limit | 12 pages | null | 10.1103/PhysRevD.71.063518 | null | gr-qc hep-th | null | The asymptotic behaviour of the components of the Weyl tensor and of the
energy-momentum tensor in the Penrose limit is determined. In both cases a
peeling-off property is found. Examples of different types of matter are
provided. The expansion and shear of the congruence of null geodesics along
which the Penrose lim... | [
{
"created": "Wed, 24 Nov 2004 16:16:59 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kunze",
"Kerstin E.",
""
]
] | The asymptotic behaviour of the components of the Weyl tensor and of the energy-momentum tensor in the Penrose limit is determined. In both cases a peeling-off property is found. Examples of different types of matter are provided. The expansion and shear of the congruence of null geodesics along which the Penrose limit... |
gr-qc/9704048 | Bill Pezzaglia | William M. Pezzaglia Jr. and John J. Adams | Should Metric Signature Matter in Clifford Algebra Formulations of
Physical Theories? | 12 pages, latex, no figures, Summary of talk at the Special Session
on Octonions and Clifford Algebras Algebras, at the 1997 Spring Western
Sectional Meeting of the American Mathematical Society, Oregon State
University, Corvallis, OR, 19-20 April 1997.
ftp://www.clifford.org/clf-alg/preprints/1995/pezz9502.lat... | null | null | clf-alg/pezz9502 | gr-qc quant-ph | null | Standard formulation is unable to distinguish between the (+++-) and (---+)
spacetime metric signatures. However, the Clifford algebras associated with
each are inequivalent, R(4) in the first case (real 4 by 4 matrices), H(2) in
the latter (quaternionic 2 by 2). Multivector reformulations of Dirac theory by
various ... | [
{
"created": "Thu, 17 Apr 1997 08:20:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pezzaglia",
"William M.",
"Jr."
],
[
"Adams",
"John J.",
""
]
] | Standard formulation is unable to distinguish between the (+++-) and (---+) spacetime metric signatures. However, the Clifford algebras associated with each are inequivalent, R(4) in the first case (real 4 by 4 matrices), H(2) in the latter (quaternionic 2 by 2). Multivector reformulations of Dirac theory by various au... |
gr-qc/0203058 | Alejandro Perez | Alejandro Perez | Spin foam quantization of SO(4) Plebanski's action | Main conclusions in first part changed due to correction in the
derivation | Adv.Theor.Math.Phys. 5 (2002) 947-968;
Erratum-Adv.Theor.Math.Phys. 6 (2003) 593-595 | null | CGPG-02/03-1 | gr-qc hep-th | null | The goal of this work is two-fold. In the first part of this paper we regard
classical Plebanski's action as a BF action supplemented by constraints. We
introduce a spin foam model for Riemannian general relativity by systematically
implementing these constraints as restrictions on paths in the state-sum of the
BF th... | [
{
"created": "Fri, 15 Mar 2002 18:53:13 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Mar 2002 20:22:20 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Sep 2002 22:57:52 GMT",
"version": "v3"
},
{
"created": "Sat, 19 Oct 2002 22:24:53 GMT",
"version": "v4"
},
{
"c... | 2009-03-20 | [
[
"Perez",
"Alejandro",
""
]
] | The goal of this work is two-fold. In the first part of this paper we regard classical Plebanski's action as a BF action supplemented by constraints. We introduce a spin foam model for Riemannian general relativity by systematically implementing these constraints as restrictions on paths in the state-sum of the BF theo... |
gr-qc/0412010 | Francois Limousin | Dorota Gondek-Rosinska (LUTH, CAMK), Michal Bejger (CAMK), Tomek Bulik
(CAMK), Eric Gourgoulhon (LUTH), Pawel Haensel (LUTH, CAMK), Francois
Limousin (LUTH), Keisuke Taniguchi, Leszek Zdunik (CAMK) | The final phase of inspiral of neutron stars: realistic equations of
state | 6 pages, 2 figures, Advances in Space Research, in
press,doi:10.1016/j.asr.2006.09.021, available online www.sciencedirect.com,
paper updated according to the reviewer's suggestions (conclusions unchanged) | Adv.SpaceRes.39:271-274,2007 | 10.1016/j.asr.2006.09.021 | null | gr-qc | null | Coalescing compact star binaries are expected to be among the strongest
sources of gravitational radiation to be seen by laser interferometers. We
present calculations of the final phase of inspiral of equal mass irrotational
neutron star binaries and strange quark star binaries. Six types of equations
of state at ze... | [
{
"created": "Thu, 2 Dec 2004 21:33:42 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2007 07:51:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gondek-Rosinska",
"Dorota",
"",
"LUTH, CAMK"
],
[
"Bejger",
"Michal",
"",
"CAMK"
],
[
"Bulik",
"Tomek",
"",
"CAMK"
],
[
"Gourgoulhon",
"Eric",
"",
"LUTH"
],
[
"Haensel",
"Pawel",
"",
"LUTH, CAMK"
],
[
"Limousi... | Coalescing compact star binaries are expected to be among the strongest sources of gravitational radiation to be seen by laser interferometers. We present calculations of the final phase of inspiral of equal mass irrotational neutron star binaries and strange quark star binaries. Six types of equations of state at zero... |
gr-qc/9911082 | Laszlo A. Gergely | L\'aszl\'o \'A. Gergely | Spin-spin effects in radiating compact binaries | 12 pages, to appear in Phys. Rev. D | Phys.Rev. D61 (2000) 024035 | 10.1103/PhysRevD.61.024035 | null | gr-qc | null | The dynamics of a binary system with two spinning components on an eccentric
orbit is studied, with the inclusion of the spin-spin interaction terms
appearing at the second post-Newtonian order. A generalized true anomaly
parametrization properly describes the radial component of the motion. The
average over one radi... | [
{
"created": "Mon, 22 Nov 1999 14:02:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gergely",
"László Á.",
""
]
] | The dynamics of a binary system with two spinning components on an eccentric orbit is studied, with the inclusion of the spin-spin interaction terms appearing at the second post-Newtonian order. A generalized true anomaly parametrization properly describes the radial component of the motion. The average over one radial... |
0802.4063 | Jerzy Matyjasek | Jerzy Matyjasek | Entropy of nonlinear black holes in quadratic gravity | null | ActaPhys.Polon.B39:3-22,2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Employing the Noether charge technique and Visser's Euclidean approach the
entropy of the nonlinear black hole described by the perturbative solution of
the system of coupled equations of the quadratic gravity and nonlinear
electrodynamics is constructed. The solution is parametrized by the exact
location of the even... | [
{
"created": "Wed, 27 Feb 2008 18:22:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Matyjasek",
"Jerzy",
""
]
] | Employing the Noether charge technique and Visser's Euclidean approach the entropy of the nonlinear black hole described by the perturbative solution of the system of coupled equations of the quadratic gravity and nonlinear electrodynamics is constructed. The solution is parametrized by the exact location of the event ... |
gr-qc/9907053 | Andrew P. Bilyard | A. P. Billyard (1), A. A. Coley (1), R. J. van den Hoogen (2), J.
Ibanez (3) and I. Olasagasti (3) ((1) Dalhousie University, (2) Saint Francis
Xavier University, (3) Universidad del Pais Vasco) | Scalar Field Cosmologies with Barotropic Matter: Models of Bianchi class
B | 18 pages, 1 figure, uses revtex and epsf to insert figure | Class.Quant.Grav.16:4035-4056,1999 | 10.1088/0264-9381/16/12/320 | DAL-99-6a | gr-qc | null | We investigate in detail the qualitative behaviour of the class of Bianchi
type B spatially homogeneous cosmological models in which the matter content is
composed of two non-interacting components; the first component is described by
a barotropic fluid having a gamma-law equation of state, whilst the second is a
non... | [
{
"created": "Thu, 15 Jul 1999 16:53:37 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Billyard",
"A. P.",
""
],
[
"Coley",
"A. A.",
""
],
[
"Hoogen",
"R. J. van den",
""
],
[
"Ibanez",
"J.",
""
],
[
"Olasagasti",
"I.",
""
]
] | We investigate in detail the qualitative behaviour of the class of Bianchi type B spatially homogeneous cosmological models in which the matter content is composed of two non-interacting components; the first component is described by a barotropic fluid having a gamma-law equation of state, whilst the second is a non-i... |
gr-qc/0611019 | Andrea Fuster | A. Coley, A. Fuster, S. Hervik and N. Pelavas | Higher dimensional VSI spacetimes | 14 pages, changes in second paragraph of the discussion | Class.Quant.Grav.23:7431-7444,2006 | 10.1088/0264-9381/23/24/014 | NIKHEF/2006-008 | gr-qc hep-th | null | We present the explicit metric forms for higher dimensional vanishing scalar
invariant (VSI) Lorentzian spacetimes. We note that all of the VSI spacetimes
belong to the higher dimensional Kundt class. We determine all of the VSI
spacetimes which admit a covariantly constant null vector, and we note that in
general in... | [
{
"created": "Fri, 3 Nov 2006 10:38:27 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2006 10:07:03 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Coley",
"A.",
""
],
[
"Fuster",
"A.",
""
],
[
"Hervik",
"S.",
""
],
[
"Pelavas",
"N.",
""
]
] | We present the explicit metric forms for higher dimensional vanishing scalar invariant (VSI) Lorentzian spacetimes. We note that all of the VSI spacetimes belong to the higher dimensional Kundt class. We determine all of the VSI spacetimes which admit a covariantly constant null vector, and we note that in general in h... |
gr-qc/0112008 | Christiane Lechner | Christiane Lechner, Jonathan Thornburg, Sascha Husa, and Peter C.
Aichelburg | A New Transition between Discrete and Continuous Self-Similarity in
Critical Gravitational Collapse | 4 pages, 5 figures, uses REVTeX | Phys.Rev. D65 (2002) 081501 | 10.1103/PhysRevD.65.081501 | UWThPh-2001-49 | gr-qc | null | We analyze a bifurcation phenomenon associated with critical gravitational
collapse in a family of self-gravitating SU(2) $\sigma$-models. As the
dimensionless coupling constant decreases, the critical solution changes from
discretely self-similar (DSS) to continuously self-similar (CSS). Numerical
results provide ev... | [
{
"created": "Fri, 7 Dec 2001 13:19:01 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Lechner",
"Christiane",
""
],
[
"Thornburg",
"Jonathan",
""
],
[
"Husa",
"Sascha",
""
],
[
"Aichelburg",
"Peter C.",
""
]
] | We analyze a bifurcation phenomenon associated with critical gravitational collapse in a family of self-gravitating SU(2) $\sigma$-models. As the dimensionless coupling constant decreases, the critical solution changes from discretely self-similar (DSS) to continuously self-similar (CSS). Numerical results provide evid... |
gr-qc/0609014 | Robert J. Scherrer | Rupam Das, Thomas W. Kephart, and Robert J. Scherrer | Tracking quintessence and k-essence in a general cosmological background | 6 pages, no figures | Phys.Rev.D74:103515,2006 | 10.1103/PhysRevD.74.103515 | null | gr-qc astro-ph hep-th | null | We derive conditions for stable tracker solutions for both quintessence and
k-essence in a general cosmological background, H^2 \propto f(\rho). We find
that tracker solutions are possible only when \eta = d ln f /d ln \rho is
constant, aside from a few special cases, which are enumerated. Expressions for
the quintes... | [
{
"created": "Tue, 5 Sep 2006 17:23:24 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Das",
"Rupam",
""
],
[
"Kephart",
"Thomas W.",
""
],
[
"Scherrer",
"Robert J.",
""
]
] | We derive conditions for stable tracker solutions for both quintessence and k-essence in a general cosmological background, H^2 \propto f(\rho). We find that tracker solutions are possible only when \eta = d ln f /d ln \rho is constant, aside from a few special cases, which are enumerated. Expressions for the quintesse... |
gr-qc/0506108 | Archan S. Majumdar | A. S. Majumdar, D. Home, S. Sinha | Dark energy from quantum wave function collapse of dark matter | 5 pages in Elsevier style to match with version published in Phys.
Lett. B | Phys.Lett.B679:167-171,2009 | 10.1016/j.physletb.2009.07.042 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical wave function collapse models entail the continuous liberation of a
specified rate of energy arising from the interaction of a fluctuating scalar
field with the matter wave function. We consider the wave function collapse
process for the constituents of dark matter in our universe. Beginning from a
particul... | [
{
"created": "Wed, 22 Jun 2005 14:04:19 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Nov 2005 06:51:39 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Sep 2009 09:31:20 GMT",
"version": "v3"
}
] | 2010-10-27 | [
[
"Majumdar",
"A. S.",
""
],
[
"Home",
"D.",
""
],
[
"Sinha",
"S.",
""
]
] | Dynamical wave function collapse models entail the continuous liberation of a specified rate of energy arising from the interaction of a fluctuating scalar field with the matter wave function. We consider the wave function collapse process for the constituents of dark matter in our universe. Beginning from a particular... |
1106.6313 | Jonathan R. Gair | Jonathan R. Gair and Nicolas Yunes | Approximate Waveforms for Extreme-Mass-Ratio Inspirals in Modified
Gravity Spacetimes | v1: 28 pages, no figures; v2: minor changes for consistency with
accepted version, 2 figures added showing sample waveforms; accepted by Phys.
Rev. D | Phys. Rev. D 84 064016 (2011) | 10.1103/PhysRevD.84.064016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme-mass-ratio inspirals, in which a stellar-mass compact object spirals
into a supermassive black hole, are prime candidates for detection with
space-borne milliHertz gravitational wave detectors, similar to the Laser
Interferometer Space Antenna. The gravitational waves generated during such
inspirals encode in... | [
{
"created": "Thu, 30 Jun 2011 17:31:38 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Aug 2011 15:39:21 GMT",
"version": "v2"
}
] | 2011-09-15 | [
[
"Gair",
"Jonathan R.",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Extreme-mass-ratio inspirals, in which a stellar-mass compact object spirals into a supermassive black hole, are prime candidates for detection with space-borne milliHertz gravitational wave detectors, similar to the Laser Interferometer Space Antenna. The gravitational waves generated during such inspirals encode info... |
gr-qc/0309128 | Edgard Casal de Rey de Rey Neto | Edgard C. de Rey Neto | Geodesic deviation in pp-wave spacetimes of quadratic curvature gravity | 16 pages, no figures, accepted in Physical Review D | Phys.Rev. D68 (2003) 124013 | 10.1103/PhysRevD.68.124013 | null | gr-qc | null | We write the equation of geodesic deviations in the spacetime of $pp$-waves
in terms of the Newman-Penrose scalars and apply it to study gravitational
waves in quadratic curvature gravity. We show that quadratic curvature gravity
$pp$-waves can have a transverse helicity-0 polarization mode and two
transverse helicit... | [
{
"created": "Fri, 26 Sep 2003 13:05:17 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Neto",
"Edgard C. de Rey",
""
]
] | We write the equation of geodesic deviations in the spacetime of $pp$-waves in terms of the Newman-Penrose scalars and apply it to study gravitational waves in quadratic curvature gravity. We show that quadratic curvature gravity $pp$-waves can have a transverse helicity-0 polarization mode and two transverse helicity-... |
1905.06932 | Rajibul Shaikh | Rajibul Shaikh, Pritam Banerjee, Suvankar Paul, Tapobrata Sarkar | Strong gravitational lensing by wormholes | 29 pages, 7 figures, published in JCAP, references added | JCAP 07 (2019) 028 | 10.1088/1475-7516/2019/07/028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study strong gravitational lensing by a class of static wormhole
geometries. Analytical approaches to the same are developed, and the results
differ substantially from strong lensing by black holes, first reported by
Bozza. We consider two distinct situations, one in which the observer and the
source are on the sa... | [
{
"created": "Thu, 16 May 2019 17:50:01 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jul 2019 11:50:51 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Nov 2023 12:31:04 GMT",
"version": "v3"
}
] | 2023-11-07 | [
[
"Shaikh",
"Rajibul",
""
],
[
"Banerjee",
"Pritam",
""
],
[
"Paul",
"Suvankar",
""
],
[
"Sarkar",
"Tapobrata",
""
]
] | We study strong gravitational lensing by a class of static wormhole geometries. Analytical approaches to the same are developed, and the results differ substantially from strong lensing by black holes, first reported by Bozza. We consider two distinct situations, one in which the observer and the source are on the same... |
gr-qc/0008044 | Forough Nasseri | Forough Nasseri, Sohrab Rahvar | Chaotic Inflation with Time-Variable Space Dimensions | 19 pages, To be published in Int.J.Mod.Phys.D. Minor changes to match
accepted version | Int.J.Mod.Phys. D11 (2002) 511-526 | 10.1142/S0218271802001834 | null | gr-qc astro-ph | null | Assuming the space dimension is not constant but decreases during the
expansion of the Universe, we study chaotic inflation with the potential
$m^2\phi^2/2$. Our investigations are based on a model Universe with variable
space dimensions. We write down field equations in the slow-roll approximation,
and define slow-r... | [
{
"created": "Fri, 18 Aug 2000 08:20:40 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2001 06:19:48 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Nasseri",
"Forough",
""
],
[
"Rahvar",
"Sohrab",
""
]
] | Assuming the space dimension is not constant but decreases during the expansion of the Universe, we study chaotic inflation with the potential $m^2\phi^2/2$. Our investigations are based on a model Universe with variable space dimensions. We write down field equations in the slow-roll approximation, and define slow-rol... |
0712.0888 | Sergei Rubin | K.A. Bronnikov, S.G. Rubin | Abilities of multidimensional gravity | 6 pages, 3 figures | Grav.Cosmol.13:253,2007 | null | null | gr-qc | null | We show that a number of problems of modern cosmology may be addressed and
solved in the framework of multidimensional gravity with high-order curvature
invariants, without invoking other fields. As applications of this approach, we
mention primordial inflation and particle production after it; description of
the mod... | [
{
"created": "Thu, 6 Dec 2007 08:33:05 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Dec 2007 11:31:34 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Rubin",
"S. G.",
""
]
] | We show that a number of problems of modern cosmology may be addressed and solved in the framework of multidimensional gravity with high-order curvature invariants, without invoking other fields. As applications of this approach, we mention primordial inflation and particle production after it; description of the moder... |
2103.11826 | Yeinzon Rodriguez Garcia | L. Gabriel Gomez (1), Yeinzon Rodriguez (2,3), Juan P. Beltran Almeida
(4) ((1) Universidad de Santiago de Chile, (2) Universidad Antonio Narino,
(3) Universidad Industrial de Santander, (4) Universidad Nacional de
Colombia) | Anisotropic Scalar Field Dark Energy with a Disformally Coupled
Yang-Mills Field | LaTeX file in jcappub style, 40 pages, 11 figures. v2: some cosmetic
changes and new references added. v3 and v4: more changes to add clarity to
the paper and new material added. Conclusions unchanged. v5: version to
appear in International Journal of Modern Physics D | Int. J. Mod. Phys. D 31, 2250060 (2022) | 10.1142/S0218271822500602 | PI/UAN-2021-687FT | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of scalar-tensor theories, the inclusion of new degrees of
freedom coupled non-minimally to the gravitational sector might produce some
appealing effects on the cosmic expansion history. We investigate this premise
by including a canonical SU(2) Yang- Mills field to the total energy budget of
the unive... | [
{
"created": "Thu, 18 Mar 2021 12:45:56 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jul 2021 13:58:05 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Nov 2021 23:09:30 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Mar 2022 02:24:57 GMT",
"version": "v4"
},
{
"c... | 2022-05-04 | [
[
"Gomez",
"L. Gabriel",
""
],
[
"Rodriguez",
"Yeinzon",
""
],
[
"Almeida",
"Juan P. Beltran",
""
]
] | In the context of scalar-tensor theories, the inclusion of new degrees of freedom coupled non-minimally to the gravitational sector might produce some appealing effects on the cosmic expansion history. We investigate this premise by including a canonical SU(2) Yang- Mills field to the total energy budget of the univers... |
1310.0339 | Martin Reiris | Martin Reiris | Stationary solutions and asymptotic flatness II | null | null | 10.1088/0264-9381/31/15/155013 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the second part of the investigation started in [Stationary solutions
and asymptotic flatness I]. We prove here that Strongly Stationary ends having
cubic volume growth are Weakly Asymptotically Flat. Combined with the results
of the previous paper this shows that Strongly Stationary ends are
Asymptotically F... | [
{
"created": "Tue, 1 Oct 2013 15:04:55 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Reiris",
"Martin",
""
]
] | This is the second part of the investigation started in [Stationary solutions and asymptotic flatness I]. We prove here that Strongly Stationary ends having cubic volume growth are Weakly Asymptotically Flat. Combined with the results of the previous paper this shows that Strongly Stationary ends are Asymptotically Fla... |
gr-qc/0406092 | Volodymyr Gorkavenko | Volodymyr M. Gorkavenko and Alexander V. Viznyuk | Semiclassical gravitational effects near a singular magnetic flux | 14 pages, 4 figures, journal version | Phys.Lett. B604 (2004) 103-114 | 10.1016/j.physletb.2004.10.043 | null | gr-qc | null | We consider the backreaction of the vacuum polarization effect for a massive
charged scalar field in the presence of a singular magnetic massless string on
the background metric. Using semiclassical approach, we find the first-order
(in $\hbar$ units) metric modifications and the corresponding gravitational
potential... | [
{
"created": "Wed, 23 Jun 2004 08:36:10 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jul 2004 12:09:06 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Mar 2005 10:19:05 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Gorkavenko",
"Volodymyr M.",
""
],
[
"Viznyuk",
"Alexander V.",
""
]
] | We consider the backreaction of the vacuum polarization effect for a massive charged scalar field in the presence of a singular magnetic massless string on the background metric. Using semiclassical approach, we find the first-order (in $\hbar$ units) metric modifications and the corresponding gravitational potential a... |
1907.03484 | Denis Dobkowski-Ry{\l}ko | Denis Dobkowski-Ry{\l}ko, Jerzy Lewandowski, Istv\'an R\'acz | Petrov type D equation on horizons of nontrivial bundle topology | null | Phys. Rev. D 100, 084058 (2019) | 10.1103/PhysRevD.100.084058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider $3$-dimensional isolated horizons (IHs) generated by null curves
that form nontrivial $U(1)$ bundles. We find a natural interplay between the IH
geometry and the $U(1)$-bundle geometry. In this context we consider the Petrov
type D equation introduced and studied in previous works
\cite{DLP1,DLP2,LS,DKLS1... | [
{
"created": "Mon, 8 Jul 2019 10:01:03 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jul 2019 14:47:33 GMT",
"version": "v2"
},
{
"created": "Wed, 13 May 2020 20:21:27 GMT",
"version": "v3"
}
] | 2020-05-15 | [
[
"Dobkowski-Ryłko",
"Denis",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Rácz",
"István",
""
]
] | We consider $3$-dimensional isolated horizons (IHs) generated by null curves that form nontrivial $U(1)$ bundles. We find a natural interplay between the IH geometry and the $U(1)$-bundle geometry. In this context we consider the Petrov type D equation introduced and studied in previous works \cite{DLP1,DLP2,LS,DKLS1}.... |
1304.6725 | Richard Brito | Richard Brito, Vitor Cardoso, Paolo Pani | Massive spin-2 fields on black hole spacetimes: Instability of the
Schwarzschild and Kerr solutions and bounds on the graviton mass | 24 pages, 8 figures. v2: references added and discussion extended.
v3: references added, matches published version | Phys.Rev.D88:023514,2013 | 10.1103/PhysRevD.88.023514 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Massive bosonic fields of arbitrary spin are predicted by general extensions
of the Standard Model. It has been recently shown that there exists a family of
bimetric theories of gravity - including massive gravity - which are free of
Boulware-Deser ghosts at the nonlinear level. This opens up the possibility to
descr... | [
{
"created": "Wed, 24 Apr 2013 20:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Apr 2013 18:52:49 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Jul 2013 13:39:30 GMT",
"version": "v3"
}
] | 2013-07-12 | [
[
"Brito",
"Richard",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
]
] | Massive bosonic fields of arbitrary spin are predicted by general extensions of the Standard Model. It has been recently shown that there exists a family of bimetric theories of gravity - including massive gravity - which are free of Boulware-Deser ghosts at the nonlinear level. This opens up the possibility to describ... |
2303.12090 | Ghulam Abbas | H. Nazar, M. Azam, G. Abbas, R. Ahmed and R. Naeem | Relativistic Polytropic Models of Charged Anisotropic Compact Object | 31 Pages, 11 Figures, 1 Table. Published in Chinese Phys. C | Chinese Phys. C 47 (2023) 035109 | 10.1088/1674-1137/acae5b | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we have introduced new viable solutions of Einstein-Maxwell
field equations by incorporating the features of anisotropic matter
distribution in the realm of General theory of Relativity ($GR$). For this
procurement, we have employed a Finch-Skea spacetime along with a generalized
polytropic equation of... | [
{
"created": "Mon, 20 Mar 2023 20:27:27 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Nazar",
"H.",
""
],
[
"Azam",
"M.",
""
],
[
"Abbas",
"G.",
""
],
[
"Ahmed",
"R.",
""
],
[
"Naeem",
"R.",
""
]
] | In this paper, we have introduced new viable solutions of Einstein-Maxwell field equations by incorporating the features of anisotropic matter distribution in the realm of General theory of Relativity ($GR$). For this procurement, we have employed a Finch-Skea spacetime along with a generalized polytropic equation of s... |
2405.05698 | Lorenz Zwick | Lorenz Zwick, Christopher Tiede, Alessandro A. Trani, Andrea
Derdzinski, Zoltan Haiman, Daniel J. D'Orazio and Johan Samsing | Detecting environmental effects in gravitational waves from binaries
perturbed by periodic forces | Submitted to PRD. Comments welcome | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/publicdomain/zero/1.0/ | We study the gravitational wave (GW) emission of sources perturbed by
periodic dynamical forces which do not cause secular evolution in the orbital
elements. We construct a corresponding post-Newtonian waveform model and
provide estimates for the detectability of the resulting GW phase
perturbations, for both space-b... | [
{
"created": "Thu, 9 May 2024 11:54:10 GMT",
"version": "v1"
},
{
"created": "Wed, 15 May 2024 11:23:23 GMT",
"version": "v2"
}
] | 2024-05-16 | [
[
"Zwick",
"Lorenz",
""
],
[
"Tiede",
"Christopher",
""
],
[
"Trani",
"Alessandro A.",
""
],
[
"Derdzinski",
"Andrea",
""
],
[
"Haiman",
"Zoltan",
""
],
[
"D'Orazio",
"Daniel J.",
""
],
[
"Samsing",
"Johan",
... | We study the gravitational wave (GW) emission of sources perturbed by periodic dynamical forces which do not cause secular evolution in the orbital elements. We construct a corresponding post-Newtonian waveform model and provide estimates for the detectability of the resulting GW phase perturbations, for both space-bas... |
2209.12701 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Paul Martin Kull | Non-exotic traversable wormhole solutions in linear $f\left(R,T\right)$
gravity | 16 pages, 3 figures | The European Physical Journal C volume 82, Article number: 1154
(2022) | 10.1140/epjc/s10052-022-11135-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we analyze traversable wormhole solutions in the linear form of
$f\left(R,T\right)=R+\lambda T$ gravity satisfying the Null, Weak, Strong, and
Dominant Energy Conditions (NEC, WEC, SEC, and DEC respectively) for the entire
spacetime. These solutions are obtained via a fully analytical parameter space
ana... | [
{
"created": "Mon, 26 Sep 2022 13:51:42 GMT",
"version": "v1"
}
] | 2022-12-23 | [
[
"Rosa",
"João Luís",
""
],
[
"Kull",
"Paul Martin",
""
]
] | In this work we analyze traversable wormhole solutions in the linear form of $f\left(R,T\right)=R+\lambda T$ gravity satisfying the Null, Weak, Strong, and Dominant Energy Conditions (NEC, WEC, SEC, and DEC respectively) for the entire spacetime. These solutions are obtained via a fully analytical parameter space analy... |
1110.0659 | Aur\'elien Hees | A. Hees, P. Wolf, B. Lamine, S. Reynaud, M.T. Jaekel, C. Le
Poncin-Lafitte, V. Lainey and V. Dehant | Testing Gravitation in the Solar System with Radio Science experiments | proceedings of SF2A 2011 - minor changes (typos corrected -
references updated) | SF2A 2011 (SF2A, 2011) p.653-658 | null | null | gr-qc astro-ph.IM physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The laws of gravitation have been tested for a long time with steadily
improving precision, leading at some moment of time to paradigmatic evolutions.
Pursuing this continual effort is of great importance for science. In this
communication, we focus on Solar System tests of gravity and more precisely on
possible test... | [
{
"created": "Tue, 4 Oct 2011 12:36:33 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Nov 2011 10:55:50 GMT",
"version": "v2"
}
] | 2023-04-14 | [
[
"Hees",
"A.",
""
],
[
"Wolf",
"P.",
""
],
[
"Lamine",
"B.",
""
],
[
"Reynaud",
"S.",
""
],
[
"Jaekel",
"M. T.",
""
],
[
"Poncin-Lafitte",
"C. Le",
""
],
[
"Lainey",
"V.",
""
],
[
"Dehant",
"V.",... | The laws of gravitation have been tested for a long time with steadily improving precision, leading at some moment of time to paradigmatic evolutions. Pursuing this continual effort is of great importance for science. In this communication, we focus on Solar System tests of gravity and more precisely on possible tests ... |
1904.11599 | Mauricio Bellini | Juan Ignacio Musmarra (IFIMAR - CONICET & UNMDP), Mauricio Bellini
(IFIMAR - CONICET & UNMDP), Mariano Anabitarte (IFIMAR - CONICET & UNMDP) | Quantum thermodynamics in the interior of a Schwarzschild B-H | Improved version. arXiv admin note: text overlap with
arXiv:1908.11716 | null | 10.1088/1402-4896/abd203 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the interior of a Schwarzschild Black-Hole (B-H) using Relativistic
Quantum Geometry described in \cite{rb} and \cite{rb1}. We found discrete
energy levels for a scalar field from a polynomial condition for Heun Confluent
functions expanded around the Schwarzschild radius. From the solutions it is
obtained t... | [
{
"created": "Thu, 25 Apr 2019 21:40:04 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Sep 2019 12:38:57 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Oct 2019 21:52:41 GMT",
"version": "v3"
},
{
"created": "Mon, 9 Dec 2019 22:39:29 GMT",
"version": "v4"
}
] | 2021-08-16 | [
[
"Musmarra",
"Juan Ignacio",
"",
"IFIMAR - CONICET & UNMDP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR - CONICET & UNMDP"
],
[
"Anabitarte",
"Mariano",
"",
"IFIMAR - CONICET & UNMDP"
]
] | We study the interior of a Schwarzschild Black-Hole (B-H) using Relativistic Quantum Geometry described in \cite{rb} and \cite{rb1}. We found discrete energy levels for a scalar field from a polynomial condition for Heun Confluent functions expanded around the Schwarzschild radius. From the solutions it is obtained tha... |
2104.04682 | Fei Wang | Fei Wang, Rui Wang | Q-balls Formation and the Production of Gravitational Waves With
Non-minimal Gravitational Coupling | 15 pages, 4 figures. Published version in EPJC | null | 10.1140/epjc/s10052-022-10291-3 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to introduce non-minimal couplings of Affleck-Dine (AD) field to
gravity by adding the coupling of AD field to the Ricci scalar curvature. As
the Jordan frame supergravity always predict $|\Phi|^2 {\cal R}/6$ type
coupling for scalars with canonical kinetic terms, we propose a way to realize
the required $... | [
{
"created": "Sat, 10 Apr 2021 04:39:51 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Dec 2021 07:29:58 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Apr 2022 13:17:54 GMT",
"version": "v3"
}
] | 2022-04-13 | [
[
"Wang",
"Fei",
""
],
[
"Wang",
"Rui",
""
]
] | We propose to introduce non-minimal couplings of Affleck-Dine (AD) field to gravity by adding the coupling of AD field to the Ricci scalar curvature. As the Jordan frame supergravity always predict $|\Phi|^2 {\cal R}/6$ type coupling for scalars with canonical kinetic terms, we propose a way to realize the required $c_... |
1207.5170 | Richard T. Hammond | Richard T. Hammond | New spin on Einstein's non-symmetric metric tensor | 5 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A solution to the gravitational field equations based on a non-symmetric
metric tensor is examined. Unlike Einstein's interpretation of
electromagnetism, or Moffat's generalized gravity, it is shown that the
non-symmetric part of the metric tensor is the potential of the spin field.
This is in agreement with string t... | [
{
"created": "Sat, 21 Jul 2012 19:40:33 GMT",
"version": "v1"
}
] | 2012-07-24 | [
[
"Hammond",
"Richard T.",
""
]
] | A solution to the gravitational field equations based on a non-symmetric metric tensor is examined. Unlike Einstein's interpretation of electromagnetism, or Moffat's generalized gravity, it is shown that the non-symmetric part of the metric tensor is the potential of the spin field. This is in agreement with string the... |
0906.2937 | Lorenzo Iorio | Lorenzo Iorio | On the MOND External Field Effect in the Solar System | Latex2e, 6 pages, 3 tables, 2 figures. Accepted for publication in
Astrophysics & Space Science (ApSS) | Astrophys. Space Sci.323:215-219, 2009 | 10.1007/s10509-009-0061-3 | null | gr-qc astro-ph.CO astro-ph.EP astro-ph.GA physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the MOdified Newtonian Dynamics (MOND), the internal
dynamics of a gravitating system s embedded in a larger one S is affected by
the external background field E of S even if it is constant and uniform, thus
implying a violation of the Strong Equivalence Principle: it is the so-called
External Fie... | [
{
"created": "Tue, 16 Jun 2009 13:55:14 GMT",
"version": "v1"
}
] | 2009-09-17 | [
[
"Iorio",
"Lorenzo",
""
]
] | In the framework of the MOdified Newtonian Dynamics (MOND), the internal dynamics of a gravitating system s embedded in a larger one S is affected by the external background field E of S even if it is constant and uniform, thus implying a violation of the Strong Equivalence Principle: it is the so-called External Field... |
gr-qc/0001067 | Felix Finster | Felix Finster, Joel Smoller, and Shing-Tung Yau | The Interaction of Dirac Particles with Non-Abelian Gauge Fields and
Gravity - Bound States | 28 pages, 21 figures (published version) | Nucl.Phys.B584:387-414,2000 | 10.1016/S0550-3213(00)00370-9 | null | gr-qc hep-th math-ph math.AP math.MP | null | We consider a spherically symmetric, static system of a Dirac particle
interacting with classical gravity and an SU(2) Yang-Mills field. The
corresponding Einstein-Dirac-Yang/Mills equations are derived. Using numerical
methods, we find different types of soliton-like solutions of these equations
and discuss their pr... | [
{
"created": "Fri, 21 Jan 2000 19:17:14 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Aug 2000 11:54:20 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Finster",
"Felix",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We consider a spherically symmetric, static system of a Dirac particle interacting with classical gravity and an SU(2) Yang-Mills field. The corresponding Einstein-Dirac-Yang/Mills equations are derived. Using numerical methods, we find different types of soliton-like solutions of these equations and discuss their prop... |
gr-qc/0411053 | Diego Meschini | Diego Meschini, Markku Lehto, Johanna Piilonen | Geometry, pregeometry and beyond | 41 pages, Latex. v2: Date added. v3: Main arguments refined,
secondary discussions abridged; expands on the published version | Stud.Hist.Philos.Mod.Phys. 36 (2005) 435-464 | 10.1016/j.shpsb.2005.01.002 | null | gr-qc | null | This article explores the overall geometric manner in which human beings make
sense of the world around them by means of their physical theories; in
particular, in what are nowadays called pregeometric pictures of Nature. In
these, the pseudo-Riemannian manifold of general relativity is considered a
flawed descriptio... | [
{
"created": "Wed, 10 Nov 2004 19:42:37 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Nov 2004 10:22:05 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Aug 2006 18:05:29 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Meschini",
"Diego",
""
],
[
"Lehto",
"Markku",
""
],
[
"Piilonen",
"Johanna",
""
]
] | This article explores the overall geometric manner in which human beings make sense of the world around them by means of their physical theories; in particular, in what are nowadays called pregeometric pictures of Nature. In these, the pseudo-Riemannian manifold of general relativity is considered a flawed description ... |
1211.1679 | Richard Brito | Richard Brito | Dynamics around black holes: Radiation Emission and Tidal Effects | Master thesis, CENTRA / Instituto Superior Tecnico, October 2012. 72
pages; v2: References added | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis we study several dynamical processes involving black holes in
four and higher dimensions. First, using perturbative techniques, we compare
the massless and massive scalar radiation emitted by a particle radially
infalling into a Schwarzchild black hole. We show that the late-time waveform
of massive sc... | [
{
"created": "Wed, 7 Nov 2012 21:02:14 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2012 12:52:42 GMT",
"version": "v2"
}
] | 2012-11-12 | [
[
"Brito",
"Richard",
""
]
] | In this thesis we study several dynamical processes involving black holes in four and higher dimensions. First, using perturbative techniques, we compare the massless and massive scalar radiation emitted by a particle radially infalling into a Schwarzchild black hole. We show that the late-time waveform of massive scal... |
1109.6612 | Yu-Chung Chen | Yu-Chung Chen | The creation of radiation and the relic of inflaton potential | 23 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, we have performed research on the subject of the cosmological
constant problem. The scenario is based on two postulates for inflationary
theory: one is that inflaton $\phi$ can interact with radiation (relativistic
particles); the other is that radiation will be created continuously during and
after the epo... | [
{
"created": "Thu, 29 Sep 2011 18:27:58 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2012 19:53:19 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Mar 2012 09:02:44 GMT",
"version": "v3"
}
] | 2012-03-07 | [
[
"Chen",
"Yu-Chung",
""
]
] | Recently, we have performed research on the subject of the cosmological constant problem. The scenario is based on two postulates for inflationary theory: one is that inflaton $\phi$ can interact with radiation (relativistic particles); the other is that radiation will be created continuously during and after the epoch... |
2008.04013 | Francisco Lobo | Mahdi Kord Zangeneh, Francisco S. N. Lobo, Hooman Moradpour | Evolving traversable wormholes satisfying the energy conditions in the
presence of pole dark energy | 5 pages, 12 figures. V2: 7 pages, discussion and references added.
V3: 8 pages, further discussion and references added. Version accepted for
publication in Physics of the Dark Universe | Physics of the Dark Universe 31 (2021) 100779 | 10.1016/j.dark.2021.100779 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the evolution of traversable wormhole geometries in the
inflationary, radiation -- and matter -- dominated eras, and dynamic wormholes
with a traceless energy-momentum tensor (EMT), within the recently proposed
{\it pole dark energy} model. We show that the evolving radiation -- and matter
-- dominated wo... | [
{
"created": "Mon, 10 Aug 2020 10:35:00 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Oct 2020 11:24:18 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Jan 2021 14:58:43 GMT",
"version": "v3"
}
] | 2021-02-01 | [
[
"Zangeneh",
"Mahdi Kord",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Moradpour",
"Hooman",
""
]
] | We consider the evolution of traversable wormhole geometries in the inflationary, radiation -- and matter -- dominated eras, and dynamic wormholes with a traceless energy-momentum tensor (EMT), within the recently proposed {\it pole dark energy} model. We show that the evolving radiation -- and matter -- dominated worm... |
1705.04107 | Kazuki Sakai | Kazuki Sakai, Ken-ichi Oohara, Hiroyuki Nakano, Masato Kaneyama, and
Hirotaka Takahashi | Estimation of starting times of quasinormal modes in ringdown
gravitational waves with the Hilbert-Huang transform | 12 pages, 12 figures | Phys. Rev. D 96, 044047 (2017) | 10.1103/PhysRevD.96.044047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that a quasinormal mode (QNM) of a remnant black hole dominates a
ringdown gravitational wave (GW) in a binary black hole (BBH) merger. To study
properties of the QNMs, it is important to determine the time when the QNMs
appear in a GW signal as well as to calculate its frequency and amplitude. In
this pa... | [
{
"created": "Thu, 11 May 2017 10:53:51 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Jul 2017 11:14:59 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Sep 2017 11:22:26 GMT",
"version": "v3"
}
] | 2017-09-06 | [
[
"Sakai",
"Kazuki",
""
],
[
"Oohara",
"Ken-ichi",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Kaneyama",
"Masato",
""
],
[
"Takahashi",
"Hirotaka",
""
]
] | It is known that a quasinormal mode (QNM) of a remnant black hole dominates a ringdown gravitational wave (GW) in a binary black hole (BBH) merger. To study properties of the QNMs, it is important to determine the time when the QNMs appear in a GW signal as well as to calculate its frequency and amplitude. In this pape... |
gr-qc/0001051 | Yasunori Fujii | Yasunori Fujii | Cosmological Constant, Quintessence and Scalar-Tensor Theories of
Gravity | 11 pages including 3 figures. Delivered at The Ninth Workshop on
General Relativity and Gravitation, Hiroshima University, Nov. 3--6, 1999:
International Seminar Nara 99, Space, Time and Interactions, Nara Women's
University, December 4--5, 1999. To appear in Proceedings: Added footnote and
references | Grav.Cosmol. 6 (2000) 107-115 | null | null | gr-qc | null | We show how the scalar field, a candidate of quintessence, in a proposed
model of the scalar-tensor theories of gravity provides a way to understand a
small but nonzero cosmological constant as indicated by recent observations. A
particular emphasis is placed on the effort to inherit the success of the
scenario of a ... | [
{
"created": "Wed, 19 Jan 2000 10:22:23 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Feb 2000 06:25:32 GMT",
"version": "v2"
}
] | 2009-09-25 | [
[
"Fujii",
"Yasunori",
""
]
] | We show how the scalar field, a candidate of quintessence, in a proposed model of the scalar-tensor theories of gravity provides a way to understand a small but nonzero cosmological constant as indicated by recent observations. A particular emphasis is placed on the effort to inherit the success of the scenario of a de... |
gr-qc/0312054 | Mariano Cadoni | Mariano Cadoni | An Einstein-like theory of gravity with a non-newtonian weak-field limit | Final version, accepted for publication on General Relativity and
Gravitation | Gen.Rel.Grav.36:2681-2688,2004 | 10.1023/B:GERG.0000048982.05514.18 | INFNCA-TH0305 | gr-qc astro-ph | null | We propose a model describing Einstein gravity coupled to a scalar field with
an exponential potential. We show that the weak-field limit of the model has
static solutions given by a gravitational potential behaving for large
distances as \ln r . The Newtonian term GM/r appears only as subleading. Our
model can be us... | [
{
"created": "Tue, 9 Dec 2003 16:19:00 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Dec 2003 11:27:20 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Sep 2004 14:15:09 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Cadoni",
"Mariano",
""
]
] | We propose a model describing Einstein gravity coupled to a scalar field with an exponential potential. We show that the weak-field limit of the model has static solutions given by a gravitational potential behaving for large distances as \ln r . The Newtonian term GM/r appears only as subleading. Our model can be used... |
2010.03683 | Shahar Hadar | Shahar Hadar, Michael D. Johnson, Alexandru Lupsasca, George N. Wong | Photon Ring Autocorrelations | 31 pages, 3 figures. v2: published version. v3: minor corrections,
summarized in an appendix; conclusions essentially unchanged | Phys. Rev. D 103, 104038 (2021) | 10.1103/PhysRevD.103.104038 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the presence of a black hole, light sources connect to observers along
multiple paths. As a result, observed brightness fluctuations must be
correlated across different times and positions in black hole images. Photons
that execute multiple orbits around the black hole appear near a critical curve
in the observer ... | [
{
"created": "Wed, 7 Oct 2020 22:56:50 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2021 16:24:18 GMT",
"version": "v2"
},
{
"created": "Sun, 18 Jun 2023 12:21:02 GMT",
"version": "v3"
}
] | 2023-06-21 | [
[
"Hadar",
"Shahar",
""
],
[
"Johnson",
"Michael D.",
""
],
[
"Lupsasca",
"Alexandru",
""
],
[
"Wong",
"George N.",
""
]
] | In the presence of a black hole, light sources connect to observers along multiple paths. As a result, observed brightness fluctuations must be correlated across different times and positions in black hole images. Photons that execute multiple orbits around the black hole appear near a critical curve in the observer sk... |
2405.08680 | Manabendra Sharma | Gaurav Bhandari, S. D. Pathak, Manabendra Sharma and Anzhong Wang | Generalized uncertainty principle distorted quintessence dynamics | 12. arXiv admin note: text overlap with arXiv:2404.09049 | null | null | null | gr-qc hep-th math-ph math.MP quant-ph | http://creativecommons.org/licenses/by/4.0/ | In this paper, we invoke a generalized uncertainty principle (GUP) in the
symmetry-reduced cosmological Hamiltonian for a universe driven by a
quintessence scalar field with potential. Our study focuses on semi-classical
regime. In particular, we derive the GUP-distorted Friedmann, Raychaudhuri, and
the Klein-Gordon ... | [
{
"created": "Tue, 14 May 2024 15:03:06 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Bhandari",
"Gaurav",
""
],
[
"Pathak",
"S. D.",
""
],
[
"Sharma",
"Manabendra",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper, we invoke a generalized uncertainty principle (GUP) in the symmetry-reduced cosmological Hamiltonian for a universe driven by a quintessence scalar field with potential. Our study focuses on semi-classical regime. In particular, we derive the GUP-distorted Friedmann, Raychaudhuri, and the Klein-Gordon eq... |
1905.05995 | Khalid Saifullah | Mudassar Rehman and Khalid Saifullah | Unified first law for traversable wormholes in non-minimal coupling of
curvature and matter | null | Annals of Physics 407 (2019) 57 | 10.1016/j.aop.2019.04.014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper thermodynamics of static Morris-Thorne wormholes has been
discussed in the context of $f(R)$ gravity. The generalized surface gravity,
unified first law of thermodynamics and wormhole dynamics have been studied at
trapping horizons. We have investigated thermodynamics in non-minimal coupling
of curvatur... | [
{
"created": "Wed, 15 May 2019 07:34:23 GMT",
"version": "v1"
}
] | 2019-05-16 | [
[
"Rehman",
"Mudassar",
""
],
[
"Saifullah",
"Khalid",
""
]
] | In this paper thermodynamics of static Morris-Thorne wormholes has been discussed in the context of $f(R)$ gravity. The generalized surface gravity, unified first law of thermodynamics and wormhole dynamics have been studied at trapping horizons. We have investigated thermodynamics in non-minimal coupling of curvature ... |
2211.10612 | Mohaddeseh Seifi | Mohaddeseh Seifi and Akram S. Sefiedgar | Thermodynamics of Horndeski Black Holes with Generalized Uncertainty
Principle | 17pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Horndeski theory is the most general scalar-tensor extension of General
Relativity with second order field equations. It may be interesting to study
the effects of the Generalized Uncertainty Principle on a static and
asymptotically flat shift symmetric solutions of the Horndeski black holes.
With this motivation, he... | [
{
"created": "Sat, 19 Nov 2022 08:09:28 GMT",
"version": "v1"
}
] | 2022-11-22 | [
[
"Seifi",
"Mohaddeseh",
""
],
[
"Sefiedgar",
"Akram S.",
""
]
] | Horndeski theory is the most general scalar-tensor extension of General Relativity with second order field equations. It may be interesting to study the effects of the Generalized Uncertainty Principle on a static and asymptotically flat shift symmetric solutions of the Horndeski black holes. With this motivation, here... |
0907.3311 | Roman Kezerashvili | Roman Ya. Kezerashvili and Justin F. Vazquez-Poritz | Deviations from Keplerian Orbits for Solar Sails | 6 pages, 2 figures. Proceedings of the Sixth IAA Symposium on
Realistic Near-Term Advanced Scientific Space Missions. Missions to the Outer
Solar System and Beyond, pp. 37- 42, Aosta, Italy, 6-9 July, 2009 | null | null | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the curvature of spacetime, a possible net electric charge
on the sun, a small positive cosmological constant and the oblateness of the
sun, in conjunction with solar radiation pressure (SPR), affect the bound
orbital motion of solar sails and lead to deviations from Kepler's third law
for heliocentr... | [
{
"created": "Mon, 20 Jul 2009 01:28:31 GMT",
"version": "v1"
}
] | 2009-08-17 | [
[
"Kezerashvili",
"Roman Ya.",
""
],
[
"Vazquez-Poritz",
"Justin F.",
""
]
] | It is shown that the curvature of spacetime, a possible net electric charge on the sun, a small positive cosmological constant and the oblateness of the sun, in conjunction with solar radiation pressure (SPR), affect the bound orbital motion of solar sails and lead to deviations from Kepler's third law for heliocentric... |
1602.01041 | Anton Stupka | A. A. Stupka | Gravitation Field Dynamics in Jeans Theory | Time equations; Jeans theory; Bogolyubov reduced description method;
perturbation types.
http://www.ias.ac.in/article/fulltext/joaa/029/03-04/0379-0386 | Journal of Astrophysics and Astronomy, Volume 29 Issue 3-4
September-December 2008 pp 379-386 | 10.1007/s12036-008-0050-x | null | gr-qc astro-ph.GA cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Closed system of time equations for nonrelativistic gravitation field and
hydrodynamic medium was obtained by taking into account binary correlations of
the field, which is the generalization of Jeans theory. Distribution function
of the systemwas built on the basis of the Bogolyubov reduced description
method. Calcu... | [
{
"created": "Tue, 2 Feb 2016 18:51:33 GMT",
"version": "v1"
}
] | 2016-02-10 | [
[
"Stupka",
"A. A.",
""
]
] | Closed system of time equations for nonrelativistic gravitation field and hydrodynamic medium was obtained by taking into account binary correlations of the field, which is the generalization of Jeans theory. Distribution function of the systemwas built on the basis of the Bogolyubov reduced description method. Calcula... |
1105.6228 | Muhammad Sharif | M. Sharif and Shamaila Rani | F(T) Models within Bianchi Type I Universe | 19 pages, accepted for publication in Mod. Phys. Lett. A | Mod. Phys. Lett. A26 (2011)1657-1671 | 10.1142/S0217732311036127 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider spatially homogenous and anisotropic Bianchi type
I universe in the context of F(T) gravity. We construct some corresponding
models using conservation equation and equation of state parameter representing
different phases of the universe. In particular, we take matter dominated era,
radiati... | [
{
"created": "Tue, 31 May 2011 09:55:22 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Sharif",
"M.",
""
],
[
"Rani",
"Shamaila",
""
]
] | In this paper, we consider spatially homogenous and anisotropic Bianchi type I universe in the context of F(T) gravity. We construct some corresponding models using conservation equation and equation of state parameter representing different phases of the universe. In particular, we take matter dominated era, radiation... |
2408.04402 | Foad Parsaei | Sara Rastgoo and Foad Parsaei | Wormholes in $f(R,T)$ gravity with variable equation of state | 11 pages, 7 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this work, we introduce a novel set of asymptotically flat wormhole
solutions within the framework of $f(R,T)$ theory of gravity. Considering a
linear
$f(R,T)=R+ 2\lambda T$ form, we show that a wide variety of wormhole
solutions with asymptotically linear equation of state exist. Our solutions
satisfy all the e... | [
{
"created": "Thu, 8 Aug 2024 12:10:07 GMT",
"version": "v1"
}
] | 2024-08-09 | [
[
"Rastgoo",
"Sara",
""
],
[
"Parsaei",
"Foad",
""
]
] | In this work, we introduce a novel set of asymptotically flat wormhole solutions within the framework of $f(R,T)$ theory of gravity. Considering a linear $f(R,T)=R+ 2\lambda T$ form, we show that a wide variety of wormhole solutions with asymptotically linear equation of state exist. Our solutions satisfy all the energ... |
2306.06911 | Ayanendu Dutta | Ayanendu Dutta, Dhritimalya Roy, Nihal Jalal Pullisseri, and Subenoy
Chakraborty | Wormhole formation in massive gravity: An analytic description | 13 pages, 6 figures, 1 table. Few typos are corrected from the
previous version | Eur. Phys. J. C 83 (6), 500 (2023) | 10.1140/epjc/s10052-023-11681-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present study analyses the wormhole solution both in the dRGT-$ f(R,T) $
massive gravity and Einstein massive gravity. In both the models, the
anisotropic pressure solution in ultrastatic wormhole geometry gives rise to
the shape function that involves massive gravity parameters $ \gamma $ and $
\Lambda $. Howeve... | [
{
"created": "Mon, 12 Jun 2023 07:33:20 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jul 2024 13:15:50 GMT",
"version": "v2"
}
] | 2024-07-02 | [
[
"Dutta",
"Ayanendu",
""
],
[
"Roy",
"Dhritimalya",
""
],
[
"Pullisseri",
"Nihal Jalal",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present study analyses the wormhole solution both in the dRGT-$ f(R,T) $ massive gravity and Einstein massive gravity. In both the models, the anisotropic pressure solution in ultrastatic wormhole geometry gives rise to the shape function that involves massive gravity parameters $ \gamma $ and $ \Lambda $. However,... |
gr-qc/0408053 | Alan D. Rendall | Alan D. Rendall | Mathematical properties of cosmological models with accelerated
expansion | Based on a lecture given at Bad Honnef | Lect.Notes Phys. 692 (2006) 141-155 | 10.1007/11550259_7 | AEI-2004-061 | gr-qc | null | An introduction to solutions of the Einstein equations defining cosmological
models with accelerated expansion is given. Connections between mathematical
and physical issues are explored. Theorems which have been proved for solutions
with positive cosmological constant or nonlinear scalar fields are reviewed.
Some re... | [
{
"created": "Tue, 17 Aug 2004 12:08:47 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Rendall",
"Alan D.",
""
]
] | An introduction to solutions of the Einstein equations defining cosmological models with accelerated expansion is given. Connections between mathematical and physical issues are explored. Theorems which have been proved for solutions with positive cosmological constant or nonlinear scalar fields are reviewed. Some rema... |
1906.05749 | Genly Le\'on | Genly Leon, A. Coley, Andronikos Paliathanasis | Static Spherically Symmetric Einstein-aether models II: Integrability
and the Modified Tolman-Oppenheimer-Volkoff approach | 85 pages, 18 compound figures, first revision, references and
discussion added | null | 10.1016/j.aop.2019.168002 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the existence of analytic solutions for the field equations in
the Einstein-\ae ther theory for a static spherically symmetric spacetime and
provide a detailed dynamical system analysis of the field equations. In
particular, we investigate if the gravitational field equations in the
Einstein-\ae ther m... | [
{
"created": "Thu, 13 Jun 2019 15:17:11 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Aug 2019 04:49:28 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Leon",
"Genly",
""
],
[
"Coley",
"A.",
""
],
[
"Paliathanasis",
"Andronikos",
""
]
] | We investigate the existence of analytic solutions for the field equations in the Einstein-\ae ther theory for a static spherically symmetric spacetime and provide a detailed dynamical system analysis of the field equations. In particular, we investigate if the gravitational field equations in the Einstein-\ae ther mod... |
2001.03943 | Ulf Leonhardt | Ulf Leonhardt | The case for a Casimir cosmology | Discussion paper for lecture at
https://royalsociety.org/science-events-and-lectures/2019/12/analogue-gravity/ | null | 10.1098/rsta.2019.0229 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological constant, also known as dark energy, was believed to be
caused by vacuum fluctuations, but naive calculations give results in stark
disagreement with fact. In the Casimir effect, vacuum fluctuations cause forces
in dielectric media, which is very well described by Lifshitz theory. Recently,
using the... | [
{
"created": "Sun, 12 Jan 2020 15:04:45 GMT",
"version": "v1"
}
] | 2021-03-03 | [
[
"Leonhardt",
"Ulf",
""
]
] | The cosmological constant, also known as dark energy, was believed to be caused by vacuum fluctuations, but naive calculations give results in stark disagreement with fact. In the Casimir effect, vacuum fluctuations cause forces in dielectric media, which is very well described by Lifshitz theory. Recently, using the a... |
2101.00654 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | Comparing $f(R)$ modified gravity and noncommutative geometry in the
context of dark matter and traversable wormholes: a survey | 9 pages, no figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Noncommutative geometry, as conceptualized by Nicolini, Smailagic, and
Spallucci, may be viewed as a slight modification of Einstein's theory. The
same can be said for $f(R)$ modified gravity for an appropriate choice of the
function $f(R)$. Since such an $f(R)$ could be determined from the
noncommutative-geometry ba... | [
{
"created": "Sun, 3 Jan 2021 16:25:07 GMT",
"version": "v1"
}
] | 2021-01-05 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | Noncommutative geometry, as conceptualized by Nicolini, Smailagic, and Spallucci, may be viewed as a slight modification of Einstein's theory. The same can be said for $f(R)$ modified gravity for an appropriate choice of the function $f(R)$. Since such an $f(R)$ could be determined from the noncommutative-geometry back... |
1801.01966 | Tomohiro Harada | Tomohiro Harada, B. J. Carr, Takahisa Igata | Complete conformal classification of the
Friedmann-Lemaitre-Robertson-Walker solutions with a linear equation of state | 37 pages, 8 figures, minor correction, accepted for publication in
Classical and Quantum Gravity | null | 10.1088/1361-6382/aab99f | RUP-17-27 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We completely classify Friedmann-Lema\^{i}tre-Robertson-Walker solutions with
spatial curvature $K=0,\pm 1$ and equation of state $p=w\rho$, according to
their conformal structure, singularities and trapping horizons. We do not
assume any energy conditions and allow $\rho < 0$, thereby going beyond the
usual well-kno... | [
{
"created": "Sat, 6 Jan 2018 04:52:28 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Mar 2018 06:00:41 GMT",
"version": "v2"
}
] | 2018-05-02 | [
[
"Harada",
"Tomohiro",
""
],
[
"Carr",
"B. J.",
""
],
[
"Igata",
"Takahisa",
""
]
] | We completely classify Friedmann-Lema\^{i}tre-Robertson-Walker solutions with spatial curvature $K=0,\pm 1$ and equation of state $p=w\rho$, according to their conformal structure, singularities and trapping horizons. We do not assume any energy conditions and allow $\rho < 0$, thereby going beyond the usual well-known... |
2106.14761 | Soumya Chakrabarti | Soumya Chakrabarti (Saha Institute of Nuclear Physics, Kolkata) and
Sayan Kar (IIT Kharagpur) | A wormhole geometry from gravitational collapse | 14 Pages, 8 Figures, Accepted for publication in Physical Review D | null | 10.1103/PhysRevD.104.024071 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a proposal on how gravitational collapse of a NEC (Null Energy
Condition) violating spherically symmetric fluid distribution can avoid the
formation of a zero proper volume singularity and eventually lead to a
Lorentzian wormhole geometry. Our idea is illustrated using a time-evolving
wormhole spacetime in... | [
{
"created": "Mon, 28 Jun 2021 14:35:50 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Chakrabarti",
"Soumya",
"",
"Saha Institute of Nuclear Physics, Kolkata"
],
[
"Kar",
"Sayan",
"",
"IIT Kharagpur"
]
] | We discuss a proposal on how gravitational collapse of a NEC (Null Energy Condition) violating spherically symmetric fluid distribution can avoid the formation of a zero proper volume singularity and eventually lead to a Lorentzian wormhole geometry. Our idea is illustrated using a time-evolving wormhole spacetime in w... |
gr-qc/9602051 | Russell Cosgrove | R. Cosgrove | A Single Particle Interpretation of Relativistic Quantum Mechanics | 13 pages, LaTeX, no figures | null | null | null | gr-qc quant-ph | null | The relativistic free particle system in 1+1 dimensions is formulated as a
``bi-Hamiltonian system''. One Hamiltonian generates ordinary time
translations, and another generates (essentially) boosts. Any observer,
accelerated or not, sees evolution as the continuous unfolding of a canonical
transformation which may b... | [
{
"created": "Tue, 27 Feb 1996 01:47:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cosgrove",
"R.",
""
]
] | The relativistic free particle system in 1+1 dimensions is formulated as a ``bi-Hamiltonian system''. One Hamiltonian generates ordinary time translations, and another generates (essentially) boosts. Any observer, accelerated or not, sees evolution as the continuous unfolding of a canonical transformation which may be ... |
1001.1961 | J. Ponce de Leon | J. Ponce de Leon | Brans-Dicke Cosmology in 4D from scalar-vacuum in 5D | A typo in equation (4) is fixed. Accepted for publication in J.
Cosmol. Astropart. Phys. (JCAP) | JCAP 1003:030,2010 | 10.1088/1475-7516/2010/03/030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Brans-Dicke (BD) theory in 5D may explain the present cosmic
accelerated expansion without recurring to matter fields in 5D or dark energy
in 4D. Without making any assumption on the nature of the extra coordinate or
the matter content in 5D, here we demonstrate that the vacuum BD field
equations in 5D a... | [
{
"created": "Tue, 12 Jan 2010 18:01:36 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2010 12:27:05 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"de Leon",
"J. Ponce",
""
]
] | We show that Brans-Dicke (BD) theory in 5D may explain the present cosmic accelerated expansion without recurring to matter fields in 5D or dark energy in 4D. Without making any assumption on the nature of the extra coordinate or the matter content in 5D, here we demonstrate that the vacuum BD field equations in 5D are... |
gr-qc/0506128 | Martin Bojowald | Martin Bojowald | Nonsingular Black Holes and Degrees of Freedom in Quantum Gravity | 4 pages | Phys.Rev.Lett.95:061301,2005 | 10.1103/PhysRevLett.95.061301 | AEI-2005-115 | gr-qc hep-th | null | Spherically symmetric space-times provide many examples for interesting black
hole solutions, which classically are all singular. Following a general
program, space-like singularities in spherically symmetric quantum geometry, as
well as other inhomogeneous models, are shown to be absent. Moreover, one sees
how the c... | [
{
"created": "Tue, 28 Jun 2005 12:51:48 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Bojowald",
"Martin",
""
]
] | Spherically symmetric space-times provide many examples for interesting black hole solutions, which classically are all singular. Following a general program, space-like singularities in spherically symmetric quantum geometry, as well as other inhomogeneous models, are shown to be absent. Moreover, one sees how the cla... |
2405.13544 | Iarley P. Lobo Dr | Gislaine Var\~ao, Iarley P. Lobo, Valdir B. Bezerra | Fractional quantum mechanics meets quantum gravity phenomenology | 9 pages, 2 figures | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | This paper extends previous findings on the modified Schr\"odinger evolution
inspired by quantum gravity phenomenology. By establishing a connection between
this approach and fractional quantum mechanics, we provide insights into a
potential deep infrared regime of quantum gravity, characterized by the
emergence of f... | [
{
"created": "Wed, 22 May 2024 11:28:22 GMT",
"version": "v1"
}
] | 2024-05-24 | [
[
"Varão",
"Gislaine",
""
],
[
"Lobo",
"Iarley P.",
""
],
[
"Bezerra",
"Valdir B.",
""
]
] | This paper extends previous findings on the modified Schr\"odinger evolution inspired by quantum gravity phenomenology. By establishing a connection between this approach and fractional quantum mechanics, we provide insights into a potential deep infrared regime of quantum gravity, characterized by the emergence of fra... |
1602.06436 | Jesper M{\o}ller Grimstrup | Johannes Aastrup and Jesper M. Grimstrup | On a Lattice-Independent Formulation of Quantum Holonomy Theory | 22 pages, 1 figure. Title and section on Dirac operator changed | null | 10.1088/0264-9381/33/21/215002 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum holonomy theory is a candidate for a non-perturbative theory of
quantum gravity coupled to fermions. The theory is based on the QHD(M) algebra,
which essentially encodes how matter degrees of freedom are moved on a
three-dimensional manifold. In this paper we commence the development of a
lattice-independent ... | [
{
"created": "Sat, 20 Feb 2016 18:40:09 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Apr 2016 15:33:52 GMT",
"version": "v2"
}
] | 2016-10-19 | [
[
"Aastrup",
"Johannes",
""
],
[
"Grimstrup",
"Jesper M.",
""
]
] | Quantum holonomy theory is a candidate for a non-perturbative theory of quantum gravity coupled to fermions. The theory is based on the QHD(M) algebra, which essentially encodes how matter degrees of freedom are moved on a three-dimensional manifold. In this paper we commence the development of a lattice-independent fo... |
2404.00159 | Viktoria Kabel | Anne-Catherine de la Hamette, Viktoria Kabel, \v{C}aslav Brukner | What an event is not: unravelling the identity of events in quantum
theory and gravity | 6 pages, 1 figure. Essay written for the Gravity Research Foundation
2024 Awards for Essays on Gravitation | null | null | null | gr-qc physics.hist-ph quant-ph | http://creativecommons.org/licenses/by/4.0/ | We explore the notion of events at the intersection between quantum physics
and gravity, inspired by recent research on superpositions of semiclassical
spacetimes. By going through various experiments and thought experiments --
from a decaying atom, to the double-slit experiment, to the quantum switch --
we analyse w... | [
{
"created": "Fri, 29 Mar 2024 21:22:16 GMT",
"version": "v1"
}
] | 2024-04-02 | [
[
"de la Hamette",
"Anne-Catherine",
""
],
[
"Kabel",
"Viktoria",
""
],
[
"Brukner",
"Časlav",
""
]
] | We explore the notion of events at the intersection between quantum physics and gravity, inspired by recent research on superpositions of semiclassical spacetimes. By going through various experiments and thought experiments -- from a decaying atom, to the double-slit experiment, to the quantum switch -- we analyse whi... |
1001.1158 | Piero Nicolini | Davide Batic, Piero Nicolini | Fuzziness at the horizon | 4 pages, 1 figure, new version matching that accepted for publication | Phys.Lett.B692:32-35,2010 | 10.1016/j.physletb.2010.07.007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of the noncommutative Schwarzschild black hole
interior by analysing the propagation of a massless scalar field between the
two horizons. We show that the spacetime fuzziness triggered by the field
higher momenta can cure the classical exponential blue shift divergence,
suppressing the emergenc... | [
{
"created": "Thu, 7 Jan 2010 21:09:35 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Aug 2010 13:49:41 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Batic",
"Davide",
""
],
[
"Nicolini",
"Piero",
""
]
] | We study the stability of the noncommutative Schwarzschild black hole interior by analysing the propagation of a massless scalar field between the two horizons. We show that the spacetime fuzziness triggered by the field higher momenta can cure the classical exponential blue shift divergence, suppressing the emergence ... |
2001.03478 | Adrien Druart | Geoffrey Comp\`ere and Adrien Druart | Near-horizon geodesics of high-spin black holes | Accepted for publication in PRD, 4 ancillary files, 62 pages, 31
figures | Phys. Rev. D 101, 084042 (2020) | 10.1103/PhysRevD.101.084042 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an exhaustive and illustrated classification of timelike and null
geodesics in the near-horizon region of near-extremal Kerr black holes. The
classification of polar motion extends to Kerr black holes of arbitrary spin.
The classification of radial motion leads to a simple parametrization of the
separatrix... | [
{
"created": "Fri, 10 Jan 2020 14:39:33 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Apr 2020 08:04:44 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jun 2020 09:02:09 GMT",
"version": "v3"
}
] | 2020-06-24 | [
[
"Compère",
"Geoffrey",
""
],
[
"Druart",
"Adrien",
""
]
] | We provide an exhaustive and illustrated classification of timelike and null geodesics in the near-horizon region of near-extremal Kerr black holes. The classification of polar motion extends to Kerr black holes of arbitrary spin. The classification of radial motion leads to a simple parametrization of the separatrix b... |
2008.04506 | Yunho Kim | Yunho Kim and Archil Kobakhidze | Topologically induced black hole charge and its astrophysical
manifestations | 6 pages, 2 figures | null | null | null | gr-qc astro-ph.GA astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum corrected effective action for gravity contains massive spin-2 ghost
degrees of freedom and admits a topological term which couples longitudinal
vector degrees of freedom of the massive spin-2 to Maxwell's electromagnetism.
We argue that in the presence of otherwise unobservable gravimagnetic poles
this topol... | [
{
"created": "Tue, 11 Aug 2020 04:06:06 GMT",
"version": "v1"
}
] | 2020-08-12 | [
[
"Kim",
"Yunho",
""
],
[
"Kobakhidze",
"Archil",
""
]
] | Quantum corrected effective action for gravity contains massive spin-2 ghost degrees of freedom and admits a topological term which couples longitudinal vector degrees of freedom of the massive spin-2 to Maxwell's electromagnetism. We argue that in the presence of otherwise unobservable gravimagnetic poles this topolog... |
gr-qc/9808076 | Benjamin J. Owen | Benjamin J. Owen (1) and B. S. Sathyaprakash (1 and 2) ((1) Caltech,
(2) Cardiff) | Matched filtering of gravitational waves from inspiraling compact
binaries: Computational cost and template placement | 15 pages, 4 figures, submitted to Phys. Rev. D | Phys.Rev.D60:022002,1999 | 10.1103/PhysRevD.60.022002 | GRP-505 | gr-qc | null | We estimate the number of templates, computational power, and storage
required for a one-step matched filtering search for gravitational waves from
inspiraling compact binaries. These estimates should serve as benchmarks for
the evaluation of more sophisticated strategies such as hierarchical searches.
We use wavefor... | [
{
"created": "Thu, 27 Aug 1998 20:53:36 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Owen",
"Benjamin J.",
"",
"1 and 2"
],
[
"Sathyaprakash",
"B. S.",
"",
"1 and 2"
]
] | We estimate the number of templates, computational power, and storage required for a one-step matched filtering search for gravitational waves from inspiraling compact binaries. These estimates should serve as benchmarks for the evaluation of more sophisticated strategies such as hierarchical searches. We use waveform ... |
1110.2905 | Francesca Vidotto | Francesca Vidotto | General covariant transition amplitudes in quantum cosmology | 4-page review for Scientifica Acta | Scientifica Acta 5, No. 1, Ph 17-21 (2011) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The path-integral approach to cosmology consists in the computation of
transition amplitudes between states of the quantum geometry of the universe.
In the past, the concrete computation of these transitions amplitudes has been
performed in a perturbative regime, breaking the full general covariance of the
theory. He... | [
{
"created": "Thu, 13 Oct 2011 12:07:18 GMT",
"version": "v1"
}
] | 2012-05-22 | [
[
"Vidotto",
"Francesca",
""
]
] | The path-integral approach to cosmology consists in the computation of transition amplitudes between states of the quantum geometry of the universe. In the past, the concrete computation of these transitions amplitudes has been performed in a perturbative regime, breaking the full general covariance of the theory. Here... |
gr-qc/9809072 | Roger Ellman | Roger Ellman (The-Origin Foundation, Inc) | Gravitational and Anti-gravitational Applications | 20 pages. See http://www.the-origin.org for related info | null | null | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is now possible to partially deflect gravitation away from an object so
that the gravitational attraction on the object is reduced. That effect makes
it possible to extract energy from the gravitational field, which makes the
generation of gravito-electric power technologically feasible. Such plants
would be simil... | [
{
"created": "Sat, 26 Sep 1998 16:25:55 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Oct 1998 03:09:18 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Nov 1998 20:07:42 GMT",
"version": "v3"
},
{
"created": "Tue, 29 Jun 1999 22:18:32 GMT",
"version": "v4"
},
{
"cre... | 2013-06-11 | [
[
"Ellman",
"Roger",
"",
"The-Origin Foundation, Inc"
]
] | It is now possible to partially deflect gravitation away from an object so that the gravitational attraction on the object is reduced. That effect makes it possible to extract energy from the gravitational field, which makes the generation of gravito-electric power technologically feasible. Such plants would be similar... |
gr-qc/0502008 | Spiros Cotsakis | Spiros Cotsakis | Slice Energy and Theories of Gravitation | 16 pages, In: Proceedings of the 11th Greek Relativity Meeting | J.Phys.Conf.Ser. 8 (2005) 39-48 | 10.1088/1742-6596/8/1/006 | null | gr-qc | null | We review recent work on the use of the slice energy concept in generalized
theories of gravitation. We focus on two special features in these theories,
namely, the energy exchange between the matter component and the scalar field
generated by the conformal transformation to the Einstein frame of such
theories and th... | [
{
"created": "Wed, 2 Feb 2005 11:16:24 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Cotsakis",
"Spiros",
""
]
] | We review recent work on the use of the slice energy concept in generalized theories of gravitation. We focus on two special features in these theories, namely, the energy exchange between the matter component and the scalar field generated by the conformal transformation to the Einstein frame of such theories and the ... |
2204.02755 | P. A. Gonzalez | Sharmanthie Fernando, P. A. Gonz\'alez, Yerko V\'asquez | Extreme Dilaton Black Holes in 2 +1 Dimensions: Quasinormal modes | 19 pages, 1 figure | null | 10.1140/epjc/s10052-022-10554-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study neutral massless scalar field perturbations around an extreme
dilaton black hole in 2 +1 dimensions: the wave equations of the massless
scalar field is shown to be exactly solvable in terms of Whittaker functions.
Thus, the quasinormal modes are computed exactly and shown to be purely
imaginary: we show the ... | [
{
"created": "Wed, 6 Apr 2022 12:01:58 GMT",
"version": "v1"
}
] | 2022-07-27 | [
[
"Fernando",
"Sharmanthie",
""
],
[
"González",
"P. A.",
""
],
[
"Vásquez",
"Yerko",
""
]
] | We study neutral massless scalar field perturbations around an extreme dilaton black hole in 2 +1 dimensions: the wave equations of the massless scalar field is shown to be exactly solvable in terms of Whittaker functions. Thus, the quasinormal modes are computed exactly and shown to be purely imaginary: we show the ex... |
2011.14623 | Xiao-Min Zhang | Xiao-Min Zhang, Ang Fu, Kai Li, Qian Li, Peng-Cheng Chu, Hong-Yang Ma
and Jian-Yang Zhu | Consistency of a kind of general noncanonical warm inflation | 6 pages, 0figures | Phys. Rev. D 103, 023511 (2021) | 10.1103/PhysRevD.103.023511 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The framework of a kind of noncanonical warm inflation is introduced, and the
dynamical equations of this scenario are presented. We propose the slow roll
approximations and give some redefining slow roll parameters in this scenario
which remain dimensionless. Performing systemic stability analysis, we
calculate the ... | [
{
"created": "Mon, 30 Nov 2020 08:52:40 GMT",
"version": "v1"
}
] | 2021-01-13 | [
[
"Zhang",
"Xiao-Min",
""
],
[
"Fu",
"Ang",
""
],
[
"Li",
"Kai",
""
],
[
"Li",
"Qian",
""
],
[
"Chu",
"Peng-Cheng",
""
],
[
"Ma",
"Hong-Yang",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | The framework of a kind of noncanonical warm inflation is introduced, and the dynamical equations of this scenario are presented. We propose the slow roll approximations and give some redefining slow roll parameters in this scenario which remain dimensionless. Performing systemic stability analysis, we calculate the sl... |
gr-qc/0511165 | Valerii Dryuma sem | V.Dryuma | On the Riemann Extension of the G\"odel Space-Time metric | 17 pages | null | null | null | gr-qc | null | Some properties of the G\"odel space-time metric and its Riemann extension
are studied
| [
{
"created": "Wed, 30 Nov 2005 13:04:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dryuma",
"V.",
""
]
] | Some properties of the G\"odel space-time metric and its Riemann extension are studied |
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