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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1811.08007 | Francesca Vidotto | Francesca Vidotto | Quantum insights on Primordial Black Holes as Dark Matter | 10 pages + cover page. Talk presented at 2nd World Summit on
Exploring the Dark Side of the Universe, 25-29 June 2018, University of
Antilles, Guadeloupe | PoS(EDSU2018)046 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent understanding on how quantum effects may affect black-hole evolution
opens new scenarios for dark matter, in connection with the presence of black
holes in the very early universe. Quantum fluctuations of the geometry allow
for black holes to decay into white holes via a tunnelling. This process yields
to an... | [
{
"created": "Mon, 19 Nov 2018 22:22:40 GMT",
"version": "v1"
}
] | 2018-12-27 | [
[
"Vidotto",
"Francesca",
""
]
] | A recent understanding on how quantum effects may affect black-hole evolution opens new scenarios for dark matter, in connection with the presence of black holes in the very early universe. Quantum fluctuations of the geometry allow for black holes to decay into white holes via a tunnelling. This process yields to an e... |
1910.12881 | Alexandru Lupsasca | Samuel E. Gralla, Alexandru Lupsasca | The Null Geodesics of the Kerr Exterior | 24 pages, 4 figures. v2: minor edits, matches published version. v3:
corrected errors found after publication | Phys. Rev. D 101, 044032 (2020) | 10.1103/PhysRevD.101.044032 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The null geodesic equation in the Kerr spacetime can be expressed as a set of
integral equations involving certain potentials. We classify the roots of these
potentials and express the integrals in manifestly real Legendre elliptic form.
We then solve the equations using Jacobi elliptic functions, providing the
compl... | [
{
"created": "Mon, 28 Oct 2019 18:00:04 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Feb 2020 22:49:37 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Jul 2020 03:17:11 GMT",
"version": "v3"
}
] | 2020-07-21 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Lupsasca",
"Alexandru",
""
]
] | The null geodesic equation in the Kerr spacetime can be expressed as a set of integral equations involving certain potentials. We classify the roots of these potentials and express the integrals in manifestly real Legendre elliptic form. We then solve the equations using Jacobi elliptic functions, providing the complet... |
2401.08200 | Yun Soo Myung | Yun Soo Myung | Photon ring bounds of scalar hairy charged black holes | 15 pages, 4 figures, modified version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study photon rings of constant scalar hairy black holes with mass $m$,
charge $Q$, and scalar hair $S$ obtained from the Einstein-Maxwell-conformally
coupled scalar theory. These black holes are classified as scalar hairy
Reissner-Nordstr\"{o}m (SHRN) black hole, scalar hairy charged black hole with
$S> -Q^2$, and... | [
{
"created": "Tue, 16 Jan 2024 08:28:49 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Feb 2024 03:38:13 GMT",
"version": "v2"
}
] | 2024-02-16 | [
[
"Myung",
"Yun Soo",
""
]
] | We study photon rings of constant scalar hairy black holes with mass $m$, charge $Q$, and scalar hair $S$ obtained from the Einstein-Maxwell-conformally coupled scalar theory. These black holes are classified as scalar hairy Reissner-Nordstr\"{o}m (SHRN) black hole, scalar hairy charged black hole with $S> -Q^2$, and m... |
2003.11978 | Xian Gao | Xian Gao | Higher derivative scalar-tensor monomials and their classification | 21 pages, 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make a full classification of scalar monomials built of the Riemann
curvature tensor up to the quadratic order and of the covariant derivatives of
the scalar field up to the third order. From the point of view of the effective
field theory, the third or even higher order covariant derivatives of the
scalar field a... | [
{
"created": "Thu, 26 Mar 2020 15:31:30 GMT",
"version": "v1"
}
] | 2020-03-27 | [
[
"Gao",
"Xian",
""
]
] | We make a full classification of scalar monomials built of the Riemann curvature tensor up to the quadratic order and of the covariant derivatives of the scalar field up to the third order. From the point of view of the effective field theory, the third or even higher order covariant derivatives of the scalar field are... |
0904.0706 | Malcolm MacCallum | A. di Prisco, L. Herrera, M.A.H. MacCallum and N.O. Santos | Shearfree Cylindrical Gravitational Collapse | RevTeX. References added, and discussion amended and extended in
response to referee reports. Accepted for publication in Phys. Rev. D | Phys.Rev.D80:064031,2009 | 10.1103/PhysRevD.80.064031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider diagonal cylindrically symmetric metrics, with an interior
representing a general non-rotating fluid with anisotropic pressures. An
exterior vacuum Einstein-Rosen spacetime is matched to this using Darmois
matching conditions. We show that the matching conditions can be explicitly
solved for the boundary ... | [
{
"created": "Sat, 4 Apr 2009 12:49:01 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Aug 2009 16:04:53 GMT",
"version": "v2"
}
] | 2009-11-06 | [
[
"di Prisco",
"A.",
""
],
[
"Herrera",
"L.",
""
],
[
"MacCallum",
"M. A. H.",
""
],
[
"Santos",
"N. O.",
""
]
] | We consider diagonal cylindrically symmetric metrics, with an interior representing a general non-rotating fluid with anisotropic pressures. An exterior vacuum Einstein-Rosen spacetime is matched to this using Darmois matching conditions. We show that the matching conditions can be explicitly solved for the boundary va... |
2112.01628 | Steven Carlip | S. Carlip | Spacetime foam, midisuperspace, and the cosmological constant | based on a talk at the online conference "The Quantum, the Gravity";
to appear in Universe; more details in arXiv:1809.08277 and arXiv:2106.09751 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perhaps the cosmological constant really is huge at the Planck scale, but is
"hidden" by Planck scale quantum fluctuations of spacetime. I briefly review
this proposal and provide some evidence, coming from a simplified
midisuperspace model, that an appropriate "foamy" structure can do the job of
hiding a large cosmo... | [
{
"created": "Thu, 2 Dec 2021 22:42:08 GMT",
"version": "v1"
}
] | 2021-12-06 | [
[
"Carlip",
"S.",
""
]
] | Perhaps the cosmological constant really is huge at the Planck scale, but is "hidden" by Planck scale quantum fluctuations of spacetime. I briefly review this proposal and provide some evidence, coming from a simplified midisuperspace model, that an appropriate "foamy" structure can do the job of hiding a large cosmolo... |
2310.04250 | Petr Slany | Petr Slan\'y | Test particle motion along equatorial circular orbits in the revisited
Kerr-de Sitter spacetime | 9 pages, 5 figures; to be published in Phys. Rev. D | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Both circular and epicyclic motion of test particles along equatorial
circular orbits in the revisited Kerr-de Sitter spacetime is analyzed. We
present relations for specific energy, specific angular momentum and Keplerian
angular velocity of particles on equatorial circular orbits, and discuss
criteria for the exist... | [
{
"created": "Fri, 6 Oct 2023 13:50:36 GMT",
"version": "v1"
}
] | 2023-10-09 | [
[
"Slaný",
"Petr",
""
]
] | Both circular and epicyclic motion of test particles along equatorial circular orbits in the revisited Kerr-de Sitter spacetime is analyzed. We present relations for specific energy, specific angular momentum and Keplerian angular velocity of particles on equatorial circular orbits, and discuss criteria for the existen... |
1112.3457 | Abhishek Majhi | Abhishek Majhi | Stability of Quantum Isolated Horizon : A Local Observer's View | Published Version | Class. Quantum Grav. 30 (2013) 055020 | 10.1088/0264-9381/30/5/055020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that a Quantum Isolated Horizon(QIH), as observed by a local
observer, is locally unstable as a thermodynamic system. The result is derived
in two different ways. Firstly, the specific heat of the QIH is shown to be
negative definite through a quantum statistical analysis. Then, it is shown, in
the therma... | [
{
"created": "Thu, 15 Dec 2011 09:32:33 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Apr 2012 18:41:28 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Jun 2012 10:42:31 GMT",
"version": "v3"
},
{
"created": "Thu, 28 Feb 2013 01:42:00 GMT",
"version": "v4"
}
] | 2015-03-13 | [
[
"Majhi",
"Abhishek",
""
]
] | It is shown that a Quantum Isolated Horizon(QIH), as observed by a local observer, is locally unstable as a thermodynamic system. The result is derived in two different ways. Firstly, the specific heat of the QIH is shown to be negative definite through a quantum statistical analysis. Then, it is shown, in the thermal ... |
1210.1183 | Christos Tsagas | J. D. Barrow, C. G. Tsagas, K. Yamamoto | Do intergalactic magnetic fields imply an open universe? | Minor changes, published version | Phys.Rev.D86:107302,2012 | 10.1103/PhysRevD.86.107302 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of magnetic fields at high redshifts, and in empty
intergalactic space, support the idea that cosmic magnetism has a primordial
origin. Assuming that Maxwellian electromagnetism and general relativity hold,
and without introducing any `new' physics, we show how the observed magnetic
fields can easily su... | [
{
"created": "Wed, 3 Oct 2012 17:53:05 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2012 19:33:14 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Nov 2012 16:09:36 GMT",
"version": "v3"
}
] | 2015-06-11 | [
[
"Barrow",
"J. D.",
""
],
[
"Tsagas",
"C. G.",
""
],
[
"Yamamoto",
"K.",
""
]
] | The detection of magnetic fields at high redshifts, and in empty intergalactic space, support the idea that cosmic magnetism has a primordial origin. Assuming that Maxwellian electromagnetism and general relativity hold, and without introducing any `new' physics, we show how the observed magnetic fields can easily surv... |
1102.4995 | Tomilchik Lev | L.M.Tomilchik | The dark energy effect as manifestation of the signal propagation
features in expanding Universe | 17 pages, Latex, title modified, one reference added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formula describing the explicit red-shift dependence for the distance
covered by a signal in the expanding space, and also the expressions for Hubble
law have been derived directly from the conformal group transformations taking
into account the light-cone equation. The obtained relations are associated
with the ... | [
{
"created": "Thu, 24 Feb 2011 14:08:39 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2011 09:04:49 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Tomilchik",
"L. M.",
""
]
] | The formula describing the explicit red-shift dependence for the distance covered by a signal in the expanding space, and also the expressions for Hubble law have been derived directly from the conformal group transformations taking into account the light-cone equation. The obtained relations are associated with the lu... |
2005.07188 | Andrew Sullivan | Andrew G. Sullivan, Do\u{g}a Veske, Zsuzsa M\'arka, Imre Bartos,
Stefan Ballmer, Peter Shawhan, Szabolcs M\'arka | Can we use next-generation gravitational wave detectors for terrestrial
precision measurements of Shapiro delay? | 15 pages, 5 figures, Version accepted to Classical and Quantum
Gravity, includes modified figures | Class. Quantum Grav. 37 205005 (2020) | 10.1088/1361-6382/abb260 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Shapiro time delay is one of the fundamental tests of general relativity and
post-Newtonian theories of gravity. Consequently, its measurements can be used
to probe the parameter $\gamma$ which is related to spacetime curvature
produced by a unit mass in the post-Newtonian formalism of gravity. To date all
measuremen... | [
{
"created": "Thu, 14 May 2020 17:59:55 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Aug 2020 15:02:09 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Oct 2020 16:15:02 GMT",
"version": "v3"
}
] | 2020-10-05 | [
[
"Sullivan",
"Andrew G.",
""
],
[
"Veske",
"Doğa",
""
],
[
"Márka",
"Zsuzsa",
""
],
[
"Bartos",
"Imre",
""
],
[
"Ballmer",
"Stefan",
""
],
[
"Shawhan",
"Peter",
""
],
[
"Márka",
"Szabolcs",
""
]
] | Shapiro time delay is one of the fundamental tests of general relativity and post-Newtonian theories of gravity. Consequently, its measurements can be used to probe the parameter $\gamma$ which is related to spacetime curvature produced by a unit mass in the post-Newtonian formalism of gravity. To date all measurements... |
1205.0565 | Manuel Rodrigues | Manuel E. Rodrigues, M. Hamani Daouda, M. J. S. Houndjo, Ratbay
Myrzakulov and Muhammad Sharif | Inhomogeneous Universe in f(T) Theory | 21 pages | Gravitation and Cosmology, 2014, Vol. 20, No. 2, pp. 80-89 | 10.1134/S0202289314020108 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the equations of motions of the $f(T)$ theory considering the
Lema\^itre-Tolman-Bondi's metric for a set of diagonal and non-diagonal
tetrads. In the case of diagonal tetrads the equations of motion of the $f(T)$
theory impose a constant torsion or the same equations of the General
Relativity, while in the ... | [
{
"created": "Wed, 2 May 2012 20:29:45 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Jul 2012 19:02:37 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Dec 2012 17:48:47 GMT",
"version": "v3"
},
{
"created": "Mon, 26 May 2014 16:03:40 GMT",
"version": "v4"
}
] | 2014-05-27 | [
[
"Rodrigues",
"Manuel E.",
""
],
[
"Daouda",
"M. Hamani",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sharif",
"Muhammad",
""
]
] | We obtain the equations of motions of the $f(T)$ theory considering the Lema\^itre-Tolman-Bondi's metric for a set of diagonal and non-diagonal tetrads. In the case of diagonal tetrads the equations of motion of the $f(T)$ theory impose a constant torsion or the same equations of the General Relativity, while in the ca... |
gr-qc/0412098 | Christian Boehmer | Herbert Balasin, Christian G. Boehmer, Daniel Grumiller | The Spherically Symmetric Standard Model with Gravity | 58 pages, 2 eps figures | Gen.Rel.Grav.37:1435-1482,2005 | 10.1007/s10714-005-0128-6 | TUW-04-32, LU-ITP 2004/048 | gr-qc hep-th | null | Spherical reduction of generic four-dimensional theories is revisited. Three
different notions of "spherical symmetry" are defined. The following sectors
are investigated: Einstein-Cartan theory, spinors, (non-)abelian gauge fields
and scalar fields. In each sector a different formalism seems to be most
convenient: t... | [
{
"created": "Tue, 21 Dec 2004 09:41:43 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Balasin",
"Herbert",
""
],
[
"Boehmer",
"Christian G.",
""
],
[
"Grumiller",
"Daniel",
""
]
] | Spherical reduction of generic four-dimensional theories is revisited. Three different notions of "spherical symmetry" are defined. The following sectors are investigated: Einstein-Cartan theory, spinors, (non-)abelian gauge fields and scalar fields. In each sector a different formalism seems to be most convenient: the... |
1001.4911 | Rajesh Nayak K | S. V. Dhurandhar, K. Rajesh Nayak and J-Y. Vinet | Time Delay Interferometry for LISA with one arm dysfunctional | null | Class.Quant.Grav.27:135013,2010 | 10.1088/0264-9381/27/13/135013 | IUCAA preprint no. 2/10 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to attain the requisite sensitivity for LISA - a joint space mission
of the ESA and NASA- the laser frequency noise must be suppressed below the
secondary noises such as the optical path noise, acceleration noise etc. By
combining six appropriately time-delayed data streams containing fractional
Doppler shif... | [
{
"created": "Wed, 27 Jan 2010 11:26:55 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Dhurandhar",
"S. V.",
""
],
[
"Nayak",
"K. Rajesh",
""
],
[
"Vinet",
"J-Y.",
""
]
] | In order to attain the requisite sensitivity for LISA - a joint space mission of the ESA and NASA- the laser frequency noise must be suppressed below the secondary noises such as the optical path noise, acceleration noise etc. By combining six appropriately time-delayed data streams containing fractional Doppler shifts... |
1508.02283 | C. S. Unnikrishnan | C. S. Unnikrishnan and George T. Gillies | Quantum Gravito-Optics: A Light Route from Semiclassical Gravity to
Quantum Gravity | 10 pages. Based on seed ideas in our Gravity Research Foundation
Essay 2013 | Class. Quantum Grav. 32, 145012 (2015) | 10.1088/0264-9381/32/14/145012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity remains an elusive theory, in spite of our thorough
understanding of the quantum theory and the general theory of relativity
separately, presumably due to the lack of any observational clues. We argue
that the theory of quantum gravity has a strong constraining anchor in the
sector of gravitational ra... | [
{
"created": "Mon, 3 Aug 2015 10:39:14 GMT",
"version": "v1"
}
] | 2015-08-11 | [
[
"Unnikrishnan",
"C. S.",
""
],
[
"Gillies",
"George T.",
""
]
] | Quantum gravity remains an elusive theory, in spite of our thorough understanding of the quantum theory and the general theory of relativity separately, presumably due to the lack of any observational clues. We argue that the theory of quantum gravity has a strong constraining anchor in the sector of gravitational radi... |
1812.03459 | Deyou Chen | Deyou Chen | Weak cosmic censorship conjecture in BTZ black holes with scalar fields | minor corrections, 13 pages | Chinese Physics C, Vol. 44, No. 1 (2020) 015101 | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The weak cosmic censorship conjecture in the near-extremal BTZ black hole has
been tested by the test particles and fields. It was claimed that this black
hole could be overspun. In this paper, we review the thermodynamics and weak
cosmic censorship conjecture in BTZ black holes by the scattering of the scalar
field.... | [
{
"created": "Sun, 9 Dec 2018 10:54:52 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2019 08:08:05 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Oct 2019 03:47:56 GMT",
"version": "v3"
}
] | 2019-11-11 | [
[
"Chen",
"Deyou",
""
]
] | The weak cosmic censorship conjecture in the near-extremal BTZ black hole has been tested by the test particles and fields. It was claimed that this black hole could be overspun. In this paper, we review the thermodynamics and weak cosmic censorship conjecture in BTZ black holes by the scattering of the scalar field. T... |
1903.00280 | Bert Janssen | Bert Janssen, Alejandro Jimenez-Cano, Jose Alberto Orejuela | A non-trivial connection for the metric-affine Gauss-Bonnet theory in $D
= 4$ | 13 pages, 1 figure. v2: References added. v3: 14 pages. Minor
changes, references added. Version to be published in Phys.Lett.B | Phys. Lett. B795 (2019) 42-48 | 10.1016/j.physletb.2019.06.002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study non-trivial (i.e. non-Levi-Civita) connections in metric-affine
Lovelock theories. First we study the projective invariance of general Lovelock
actions and show that all connections constructed by acting with a projective
transformation of the Levi-Civita connection are allowed solutions, albeit
physically e... | [
{
"created": "Fri, 1 Mar 2019 13:16:11 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Mar 2019 16:25:06 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Jun 2019 07:00:16 GMT",
"version": "v3"
}
] | 2019-06-17 | [
[
"Janssen",
"Bert",
""
],
[
"Jimenez-Cano",
"Alejandro",
""
],
[
"Orejuela",
"Jose Alberto",
""
]
] | We study non-trivial (i.e. non-Levi-Civita) connections in metric-affine Lovelock theories. First we study the projective invariance of general Lovelock actions and show that all connections constructed by acting with a projective transformation of the Levi-Civita connection are allowed solutions, albeit physically equ... |
1905.08626 | Fulvio Melia | Fulvio Melia | Quantum Fluctuations at the Planck Scale | 4 pages. Accepted for publication in EPJ-C Letters | Eur. Phys. J. C (2019) 79: 455 | 10.1140/epjc/s10052-019-6963-5 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recently measured cutoff, k_min=[4.34(+/-)0.50]/r_cmb (with r_cmb the
comoving distance to the last scattering surface), in the fluctuation spectrum
of the cosmic microwave background, appears to disfavor slow-roll inflation and
the associated transition of modes across the horizon. We show in this Letter
that k_... | [
{
"created": "Fri, 17 May 2019 20:29:02 GMT",
"version": "v1"
}
] | 2019-06-03 | [
[
"Melia",
"Fulvio",
""
]
] | The recently measured cutoff, k_min=[4.34(+/-)0.50]/r_cmb (with r_cmb the comoving distance to the last scattering surface), in the fluctuation spectrum of the cosmic microwave background, appears to disfavor slow-roll inflation and the associated transition of modes across the horizon. We show in this Letter that k_mi... |
gr-qc/0402016 | Wasley Krogdahl | Wasley S. Krogdahl | Cosmology in Flat Space-Time | 42 pages, 2 figures. Original version has been modified by addition
of tables and an explanation of the Hubble constant and Olbers' paradox; most
recent modification the relationship of dark energy and dark matter | null | null | null | gr-qc | null | Flat space-time has not heretofore been thought a suitable locus in which to
construct model universes because of the presumed necessity of incorporating
gravitation in such models and because of the historical lack of a theory of
gravitation in flat space-time. It is here shown that a Lorentz-invariant
theory of gra... | [
{
"created": "Tue, 3 Feb 2004 21:28:03 GMT",
"version": "v1"
},
{
"created": "Tue, 23 May 2006 18:40:26 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Oct 2006 21:37:07 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Krogdahl",
"Wasley S.",
""
]
] | Flat space-time has not heretofore been thought a suitable locus in which to construct model universes because of the presumed necessity of incorporating gravitation in such models and because of the historical lack of a theory of gravitation in flat space-time. It is here shown that a Lorentz-invariant theory of gravi... |
0806.2192 | Kuriakose Palathinkal | P.I.Kuriakose, V.C.Kuriakose | Generalized second law and entropy bound for a Reissner- Nordstr\"om
black hole | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been conjectured that black hole interacting with its surroundings
will obey the Generalized Second Law ($GSL$) of thermodynamics. Conservation of
$GSL$ is due to the fully thermal nature of Hawking radiation and an upper
bound on entropy. We study these aspects for a
Reissner-Nordstr$\ddot{\textbf{o}}$m ($RN$... | [
{
"created": "Fri, 13 Jun 2008 07:07:15 GMT",
"version": "v1"
}
] | 2008-06-16 | [
[
"Kuriakose",
"P. I.",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | It has been conjectured that black hole interacting with its surroundings will obey the Generalized Second Law ($GSL$) of thermodynamics. Conservation of $GSL$ is due to the fully thermal nature of Hawking radiation and an upper bound on entropy. We study these aspects for a Reissner-Nordstr$\ddot{\textbf{o}}$m ($RN$)b... |
2110.08809 | Seokcheon Lee | Seokcheon Lee | Determination of varying speed of light from Black hole | 12pages, 1 figure | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Recently, a viable varying speed of light (VSL) model has been proposed to
solve various late-time cosmological problems. This model has one free
parameter, $b$, to characterize the time variation of the speed of light as a
function of a scale factor, $c = c_0 a^{b/4}$. Time variation of various
physical constants an... | [
{
"created": "Sun, 17 Oct 2021 12:33:36 GMT",
"version": "v1"
}
] | 2021-10-19 | [
[
"Lee",
"Seokcheon",
""
]
] | Recently, a viable varying speed of light (VSL) model has been proposed to solve various late-time cosmological problems. This model has one free parameter, $b$, to characterize the time variation of the speed of light as a function of a scale factor, $c = c_0 a^{b/4}$. Time variation of various physical constants and ... |
1904.07703 | Kumar Das | Souvik Pramanik, Kumar Das | Even parity potential for spacetimes with Gaussian matter source and its
associated QNM spectra | 19 pages, 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have obtained the general form of even mode potential function for the
gravitational perturbation of a static spherically symmetric spacetime.
Considering the minimal-spread Gaussian matter source, parameterized by a
smearing length scale {\Theta}, the associated quasinormal mode (QNM)
frequencies are computed num... | [
{
"created": "Sun, 14 Apr 2019 18:14:39 GMT",
"version": "v1"
}
] | 2019-04-17 | [
[
"Pramanik",
"Souvik",
""
],
[
"Das",
"Kumar",
""
]
] | We have obtained the general form of even mode potential function for the gravitational perturbation of a static spherically symmetric spacetime. Considering the minimal-spread Gaussian matter source, parameterized by a smearing length scale {\Theta}, the associated quasinormal mode (QNM) frequencies are computed numer... |
2209.07009 | Shu Yan Lau | Shu Yan Lau, Kent Yagi, Phil Arras | Periastron precession effect of $f$-mode dynamical tides on
gravitational waves from eccentric double white dwarfs | 13 pages. 9 figures | Phys. Rev. D 106, 103038 (2022) | 10.1103/PhysRevD.106.103038 | null | gr-qc astro-ph.HE astro-ph.SR | http://creativecommons.org/licenses/by/4.0/ | The dynamical tide can play an important role in the orbital motion of close
eccentric double white dwarf binaries. As the launching of the space-based
gravitational-wave detector, the Laser Interferometer Space Antenna (LISA), is
just around the corner, detection of gravitational wave signals from such
systems is an... | [
{
"created": "Thu, 15 Sep 2022 02:46:47 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2022 19:42:45 GMT",
"version": "v2"
},
{
"created": "Thu, 23 May 2024 17:05:26 GMT",
"version": "v3"
}
] | 2024-05-24 | [
[
"Lau",
"Shu Yan",
""
],
[
"Yagi",
"Kent",
""
],
[
"Arras",
"Phil",
""
]
] | The dynamical tide can play an important role in the orbital motion of close eccentric double white dwarf binaries. As the launching of the space-based gravitational-wave detector, the Laser Interferometer Space Antenna (LISA), is just around the corner, detection of gravitational wave signals from such systems is anti... |
2111.04487 | Danilo Moreira | Danilo C. Moreira | Analytical scalar field solutions on Lifshitz spacetimes | 7 pages, 3 figures, (V2) accepted in PRD, (V3) the text matches
accepted version, (V4) erratum published in Phys. Rev. D 106, 039903(E)
(2022) is added | Phys. Rev. D 105, 016001 (2022) with erratum published in Phys.
Rev. D 106, 039903(E) (2022) | 10.1103/PhysRevD.105.016001, 10.1103/PhysRevD.106.039903 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, we investigate the existence of analytic solutions of static
scalar fields on Lifshitz spacetimes. We evade Derrick's theorem on curved
spacetimes by breaking general covariance and use first-order formalism to
obtain solutions with finite energy related to the time-translational
invariance of the backg... | [
{
"created": "Mon, 8 Nov 2021 13:23:08 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Dec 2021 18:34:41 GMT",
"version": "v2"
},
{
"created": "Sat, 8 Jan 2022 23:13:16 GMT",
"version": "v3"
},
{
"created": "Wed, 24 Aug 2022 07:02:37 GMT",
"version": "v4"
}
] | 2022-08-25 | [
[
"Moreira",
"Danilo C.",
""
]
] | In this work, we investigate the existence of analytic solutions of static scalar fields on Lifshitz spacetimes. We evade Derrick's theorem on curved spacetimes by breaking general covariance and use first-order formalism to obtain solutions with finite energy related to the time-translational invariance of the backgro... |
gr-qc/0501076 | Etera R. Livine | Etera R. Livine | Some Remarks on the Semi-Classical Limit of Quantum Gravity | 5 pages, Proceedings of the Second International Workshop DICE2004
(Castello di Piombino, Tuscany) "From Decoherence and Emergent Classicality
to Emergent Quantum Mechanics" | Braz.J.Phys. 35 (2005) 442-446 | 10.1590/S0103-97332005000300013 | null | gr-qc | null | One of the most important issues in quantum gravity is to identify its
semi-classical regime. First the issue is to define for we mean by a
semi-classical theory of quantum gravity, then we would like to use it to
extract physical predictions. Writing an effective theory on a flat background
is a way to address this ... | [
{
"created": "Tue, 25 Jan 2005 16:08:53 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Livine",
"Etera R.",
""
]
] | One of the most important issues in quantum gravity is to identify its semi-classical regime. First the issue is to define for we mean by a semi-classical theory of quantum gravity, then we would like to use it to extract physical predictions. Writing an effective theory on a flat background is a way to address this pr... |
1012.5531 | Ujjal Debnath | Samarpita Bhattacharya and Ujjal Debnath | Validity of Thermodynamical Laws in Dark Energy Filled Universe | 9 pages, 6 figures | Int.J.Theor.Phys.50:525-536,2011 | 10.1007/s10773-010-0564-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have considered the flat FRW model of the universe which is filled with
only dark energy. The general descriptions of first and second laws of
thermodynamics are investigated on the apparent horizon and event horizon of
the universe. We have assumed the equation of state of three different types of
dark energy mod... | [
{
"created": "Sun, 26 Dec 2010 17:18:03 GMT",
"version": "v1"
}
] | 2011-01-27 | [
[
"Bhattacharya",
"Samarpita",
""
],
[
"Debnath",
"Ujjal",
""
]
] | We have considered the flat FRW model of the universe which is filled with only dark energy. The general descriptions of first and second laws of thermodynamics are investigated on the apparent horizon and event horizon of the universe. We have assumed the equation of state of three different types of dark energy model... |
1106.4349 | Alessandro Nagar | Alessandro Nagar | Effective one body Hamiltonian of two spinning black-holes with
next-to-next-to-leading order spin-orbit coupling | 11 pages, no figures. Corrected typographical errors in Eqs.(43) and
(55). Erratum submitted to PRD | null | 10.1103/PhysRevD.84.084028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building on the recently computed next-to-next-to-leading order (NNLO)
post-Newtonian (PN) spin-orbit Hamiltonian for spinning binaries
\cite{Hartung:2011te} we extend the effective-one-body (EOB) description of the
dynamics of two spinning black-holes to NNLO in the spin-orbit interaction. The
calculation that is pr... | [
{
"created": "Tue, 21 Jun 2011 22:54:36 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Oct 2011 15:37:33 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Sep 2013 08:57:58 GMT",
"version": "v3"
}
] | 2015-05-28 | [
[
"Nagar",
"Alessandro",
""
]
] | Building on the recently computed next-to-next-to-leading order (NNLO) post-Newtonian (PN) spin-orbit Hamiltonian for spinning binaries \cite{Hartung:2011te} we extend the effective-one-body (EOB) description of the dynamics of two spinning black-holes to NNLO in the spin-orbit interaction. The calculation that is pres... |
1302.6472 | Giampiero Esposito Dr. | Steven Duplij, Elisabetta Di Grezia, Giampiero Esposito, Albert
Kotvytskiy | Non-linear constitutive equations for gravitoelectromagnetism | In the final version, the title has been changed, and only original
calculations have been presented, removing the review part | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper studies non-linear constitutive equations for
gravitoelectromagnetism. Eventually, the problem is solved of finding, for a
given particular solution of the gravity-Maxwell equations, the exact form of
the corresponding non-linear constitutive equations.
| [
{
"created": "Tue, 26 Feb 2013 16:00:41 GMT",
"version": "v1"
},
{
"created": "Mon, 27 May 2013 09:26:31 GMT",
"version": "v2"
}
] | 2013-05-28 | [
[
"Duplij",
"Steven",
""
],
[
"Di Grezia",
"Elisabetta",
""
],
[
"Esposito",
"Giampiero",
""
],
[
"Kotvytskiy",
"Albert",
""
]
] | This paper studies non-linear constitutive equations for gravitoelectromagnetism. Eventually, the problem is solved of finding, for a given particular solution of the gravity-Maxwell equations, the exact form of the corresponding non-linear constitutive equations. |
1307.8106 | Itzhak Bars | Itzhak Bars, Paul J. Steinhardt, Neil Turok | Cyclic Cosmology, Conformal Symmetry and the Metastability of the Higgs | 16 pages, 4 figures | null | 10.1016/j.physletb.2013.08.071 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent measurements at the LHC suggest that the current Higgs vacuum could be
metastable with a modest barrier (height 10^{10-12}{GeV})^{4}) separating it
from a ground state with negative vacuum density of order the Planck scale. We
note that metastability is problematic for big bang to end one cycle, bounce,
and be... | [
{
"created": "Tue, 30 Jul 2013 19:52:19 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Bars",
"Itzhak",
""
],
[
"Steinhardt",
"Paul J.",
""
],
[
"Turok",
"Neil",
""
]
] | Recent measurements at the LHC suggest that the current Higgs vacuum could be metastable with a modest barrier (height 10^{10-12}{GeV})^{4}) separating it from a ground state with negative vacuum density of order the Planck scale. We note that metastability is problematic for big bang to end one cycle, bounce, and begi... |
2312.10272 | Steven Carlip | S. Carlip and Weixuan Hu | Covariant canonical quantization and the problem of time | contribution to the book "Time and timelessness in fundamental
physics and cosmology," edited by Silvia De Bianchi, Marco Forgione and Laura
Marongiu , to be published by Springer; v2: eqn (3.1) corrected (commutators
in covariant phase space), no change in conclusions | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the covariant canonical approach to classical physics, each point in phase
space represents an entire classical trajectory. Initial data at a fixed time
serve as coordinates for this ``timeless'' phase space, and time evolution can
be viewed as a coordinate change. We argue for a similar view in quantum
theory. As... | [
{
"created": "Sat, 16 Dec 2023 00:25:07 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Dec 2023 23:20:14 GMT",
"version": "v2"
}
] | 2023-12-25 | [
[
"Carlip",
"S.",
""
],
[
"Hu",
"Weixuan",
""
]
] | In the covariant canonical approach to classical physics, each point in phase space represents an entire classical trajectory. Initial data at a fixed time serve as coordinates for this ``timeless'' phase space, and time evolution can be viewed as a coordinate change. We argue for a similar view in quantum theory. As i... |
1404.2475 | Emanuel Gallo | Emanuel Gallo and Osvaldo M. Moreschi | Intrinsic angular momentum for radiating spacetimes which agrees with
the Komar integral in the axisymmetric case | 11 pages | Phys. Rev. D 89, 084009 (2014) | 10.1103/PhysRevD.89.084009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here, we present a new definition of {intrinsic angular momentum} at future
null infinity, based on the charge-integral approach. This definition is
suitable for the general case of radiating spacetimes without symmetries, which
does not suffer from supertranslations ambiguities. In the case of axial
symmetry this ne... | [
{
"created": "Wed, 9 Apr 2014 13:10:41 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Gallo",
"Emanuel",
""
],
[
"Moreschi",
"Osvaldo M.",
""
]
] | Here, we present a new definition of {intrinsic angular momentum} at future null infinity, based on the charge-integral approach. This definition is suitable for the general case of radiating spacetimes without symmetries, which does not suffer from supertranslations ambiguities. In the case of axial symmetry this new ... |
gr-qc/9807010 | Christopher J. Hunter | C.J. Hunter | The Action of Instantons with Nut Charge | 25 pages | Phys.Rev. D59 (1999) 024009 | 10.1103/PhysRevD.59.024009 | DAMTP-1998-81 | gr-qc hep-th | null | We examine the effect of a non-trivial nut charge on the action of
non-compact four-dimensional instantons with a U(1) isometry. If the instanton
action is calculated by dimensionally reducing along the isometry, then the nut
charge is found to make an explicit non-zero contribution. For metrics
satisfying AF, ALF or... | [
{
"created": "Sun, 5 Jul 1998 19:06:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Hunter",
"C. J.",
""
]
] | We examine the effect of a non-trivial nut charge on the action of non-compact four-dimensional instantons with a U(1) isometry. If the instanton action is calculated by dimensionally reducing along the isometry, then the nut charge is found to make an explicit non-zero contribution. For metrics satisfying AF, ALF or A... |
1903.09987 | Cristina Blaga | Paul Blaga and Cristina Blaga | Periastron precession for an extremal spherically symmetric dilaton
black hole | 9 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this article is to obtain the periastron precession of a free
particle moving around an extremal spherically symmetric dilaton black hole. To
get the formulae for the periastron precession we use the phase-plane analysis
of the general relativistic equations of motion.
| [
{
"created": "Sun, 24 Mar 2019 13:32:07 GMT",
"version": "v1"
}
] | 2019-03-26 | [
[
"Blaga",
"Paul",
""
],
[
"Blaga",
"Cristina",
""
]
] | The purpose of this article is to obtain the periastron precession of a free particle moving around an extremal spherically symmetric dilaton black hole. To get the formulae for the periastron precession we use the phase-plane analysis of the general relativistic equations of motion. |
2205.07153 | Saurya Das | Saurya Das, Sourav Sur | Dark matter or strong gravity? | This essay received an Honorable Mention in the 2022 Gravity Research
Foundation Essay Competition. 4 pages | null | 10.1142/S0218271822420202 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We show that Newton's gravitational potential, augmented by a logarithmic
term, partly or wholly mitigates the need for dark matter. As a bonus, it also
explains why MOND seems to work at galactic scales. We speculate on the origin
of such a potential.
| [
{
"created": "Sat, 14 May 2022 23:52:45 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Das",
"Saurya",
""
],
[
"Sur",
"Sourav",
""
]
] | We show that Newton's gravitational potential, augmented by a logarithmic term, partly or wholly mitigates the need for dark matter. As a bonus, it also explains why MOND seems to work at galactic scales. We speculate on the origin of such a potential. |
2105.07241 | Nomaan X | Nomaan X | Aspects of Quantum Fields on Causal Sets | PhD thesis, Raman Research Institute, 2021 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some kinematical aspects of quantum fields on causal sets. In
particular, we are interested in free scalar fields on a fixed background
causal set. We present various results building up to the study of the
entanglement entropy of de Sitter horizons using causal sets. We begin by
obtaining causal set analogs... | [
{
"created": "Sat, 15 May 2021 15:05:16 GMT",
"version": "v1"
}
] | 2021-05-18 | [
[
"X",
"Nomaan",
""
]
] | We study some kinematical aspects of quantum fields on causal sets. In particular, we are interested in free scalar fields on a fixed background causal set. We present various results building up to the study of the entanglement entropy of de Sitter horizons using causal sets. We begin by obtaining causal set analogs o... |
0806.0766 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Palatini f(R) gravity as a fixed point | 9 pages, LaTeX, to appear in Phys. Lett. B | Phys.Lett.B665:135-138,2008 | 10.1016/j.physletb.2008.06.002 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of modified gravity, we point out how the Palatini version of
these theories is singled out as a very special case corresponding to the
unique fixed point of a transformation involving a special conformal rescaling
of the metric. This mathematical peculiarity signals deeply rooted problems
which make t... | [
{
"created": "Wed, 4 Jun 2008 13:00:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | In the context of modified gravity, we point out how the Palatini version of these theories is singled out as a very special case corresponding to the unique fixed point of a transformation involving a special conformal rescaling of the metric. This mathematical peculiarity signals deeply rooted problems which make the... |
1909.03760 | Bibhas Majhi Ranjan | Rabin Banerjee, Bibhas Ranjan Majhi | Fluctuation-Dissipation relation from anomalous stress tensor and
Hawking effect | Comments added, to appear in Euro. Phys. J. C | Eur.Phys.J.C 80 (2020) 5, 435 | 10.1140/epjc/s10052-020-8016-5 | null | gr-qc cond-mat.stat-mech hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show a direct connection between Kubo's fluctuation-dissipation relation
and Hawking effect that is valid in any dimensions for any stationary or static
black hole. The relevant correlators corresponding to the fluctuating part of
the force, computed from the known expressions for the anomalous stress tensor
relat... | [
{
"created": "Mon, 9 Sep 2019 11:06:54 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2020 11:34:54 GMT",
"version": "v2"
}
] | 2020-06-11 | [
[
"Banerjee",
"Rabin",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | We show a direct connection between Kubo's fluctuation-dissipation relation and Hawking effect that is valid in any dimensions for any stationary or static black hole. The relevant correlators corresponding to the fluctuating part of the force, computed from the known expressions for the anomalous stress tensor related... |
2203.03770 | Daniel R Terno | Daniel R. Terno | Inaccessibility of traversable wormholes | 6 pages. Comments welcome! | null | 10.1103/PhysRevD.106.044035 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Wormhole solutions to the equations of general relativity have some
spectacular local and global properties. As these unusual features are not
explicitly forbidden by known physics, wormholes are considered in various
astrophysical and cosmological scenarios. The paradigmatic traversable wormhole
models are described... | [
{
"created": "Mon, 7 Mar 2022 23:15:17 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Jul 2022 05:48:51 GMT",
"version": "v2"
}
] | 2022-08-31 | [
[
"Terno",
"Daniel R.",
""
]
] | Wormhole solutions to the equations of general relativity have some spectacular local and global properties. As these unusual features are not explicitly forbidden by known physics, wormholes are considered in various astrophysical and cosmological scenarios. The paradigmatic traversable wormhole models are described b... |
gr-qc/9403046 | null | Lajos Diosi | Quantum Master Equation of Particle in Gas Environment | 6 pages PlainTeX, 23-March-1994 | Europhys.Lett.30:63-68,1995 | 10.1209/0295-5075/30/2/001 | null | gr-qc cond-mat | null | The evolution of the reduced density operator $\rho$ of Brownian particle is
discussed in single collision approach valid typically in low density gas
environments. This is the first succesful derivation of quantum friction caused
by {\it local} environmental interactions. We derive a Lindblad master equation
for $\r... | [
{
"created": "Wed, 23 Mar 1994 12:19:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Diosi",
"Lajos",
""
]
] | The evolution of the reduced density operator $\rho$ of Brownian particle is discussed in single collision approach valid typically in low density gas environments. This is the first succesful derivation of quantum friction caused by {\it local} environmental interactions. We derive a Lindblad master equation for $\rho... |
2407.11929 | Thomas Beitel | Victoria Shenderov (1,2), Mark Suppiah (1,3), Thomas Beitel (1),
Germain Tobar (4), Sreenath K. Manikandan (5), Igor Pikovski (1,4) ((1)
Department of Physics, Stevens Institute of Technology, Hoboken, NJ, (2)
Cornell University, Ithaca, NY, (3) Massachusetts Institute of Technology,
Cambridge, MA, (4) Departme... | Stimulated absorption of single gravitons: First light on quantum
gravity | 10 pages + references, Based on essay selected for Honorable Mention
by the Gravity Research Foundation 2024 Awards for Essays on Gravitation | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | In a recent work we showed that the detection of the exchange of a single
graviton between a massive quantum resonator and a gravitational wave can be
achieved. Key to this ability are the experimental progress in preparing and
measuring massive resonators in the quantum regime, and the correlation with
independent L... | [
{
"created": "Tue, 16 Jul 2024 17:23:12 GMT",
"version": "v1"
}
] | 2024-07-17 | [
[
"Shenderov",
"Victoria",
""
],
[
"Suppiah",
"Mark",
""
],
[
"Beitel",
"Thomas",
""
],
[
"Tobar",
"Germain",
""
],
[
"Manikandan",
"Sreenath K.",
""
],
[
"Pikovski",
"Igor",
""
]
] | In a recent work we showed that the detection of the exchange of a single graviton between a massive quantum resonator and a gravitational wave can be achieved. Key to this ability are the experimental progress in preparing and measuring massive resonators in the quantum regime, and the correlation with independent LIG... |
1503.00126 | Yu-Xiao Liu | Yi Zhong, Bao-Min Gu, Shao-Wen Wei, Yu-Xiao Liu | Time-Dependent Scalar Fields in Modified Gravities in a Stationary
Spacetime | 6 pages, no figures | Eur.Phys.J. C 76 (2016) 377 | 10.1140/epjc/s10052-016-4225-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most no-hair theorems involve the assumption that the scalar field is
independent of time. Recently in [Phys. Rev. D90 (2014) 041501(R)] the
existence of time-dependent scalar hair outside a stationary black hole in
general relativity was ruled out. We generalize this work to modified gravities
and non-minimally coup... | [
{
"created": "Sat, 28 Feb 2015 13:34:22 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2015 10:16:00 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Jul 2015 01:11:34 GMT",
"version": "v3"
},
{
"created": "Fri, 26 Aug 2016 01:01:40 GMT",
"version": "v4"
}
] | 2016-08-29 | [
[
"Zhong",
"Yi",
""
],
[
"Gu",
"Bao-Min",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Most no-hair theorems involve the assumption that the scalar field is independent of time. Recently in [Phys. Rev. D90 (2014) 041501(R)] the existence of time-dependent scalar hair outside a stationary black hole in general relativity was ruled out. We generalize this work to modified gravities and non-minimally couple... |
2308.15101 | Mouhssine Koussour | N. Myrzakulov, M. Koussour, and A. Mussatayeva | Quintessence-like features in the late-time cosmological evolution of
$f(Q)$ symmetric teleparallel gravity | Chinese Journal of Physics published version | Chin. J. Phys. 85, 345-358 (2023) | 10.1016/j.cjph.2023.07.003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we investigate the cosmological history within the framework
of modified $f(Q)$ gravity, which proposes an alternative theory of gravity
where the gravitational force is described by a non-metricity scalar. By
employing a parametrization scheme for the Hubble parameter, we obtain the
exact solution to ... | [
{
"created": "Tue, 29 Aug 2023 08:10:48 GMT",
"version": "v1"
}
] | 2023-08-30 | [
[
"Myrzakulov",
"N.",
""
],
[
"Koussour",
"M.",
""
],
[
"Mussatayeva",
"A.",
""
]
] | In this study, we investigate the cosmological history within the framework of modified $f(Q)$ gravity, which proposes an alternative theory of gravity where the gravitational force is described by a non-metricity scalar. By employing a parametrization scheme for the Hubble parameter, we obtain the exact solution to th... |
0803.2536 | Stanislav Hled\'ik | Zden\v{e}k Stuchl\'ik and Stanislav Hled\'ik | Photon capture cones and embedding diagrams of the Ernst spacetime | 12 pages, 7 figures | Class.Quant.Grav.16:1377-1387,1999 | 10.1088/0264-9381/16/4/026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The differences between the character of the Schwarzschild and Ernst
spacetimes are illustrated by comparing the photon capture cones, and the
embedding diagrams of the $t=\mathrm{const}$ sections of the equatorial planes
of both the ordinary and optical reference geometry of these spacetimes. The
non-flat asymptotic... | [
{
"created": "Mon, 17 Mar 2008 21:44:03 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Hledík",
"Stanislav",
""
]
] | The differences between the character of the Schwarzschild and Ernst spacetimes are illustrated by comparing the photon capture cones, and the embedding diagrams of the $t=\mathrm{const}$ sections of the equatorial planes of both the ordinary and optical reference geometry of these spacetimes. The non-flat asymptotic c... |
1307.0321 | Tim-Torben Paetz | Piotr T. Chru\'sciel, Tim-Torben Paetz | Solutions of the vacuum Einstein equations with initial data on past
null infinity | 16 pages, a couple of minor changes | Class. Quantum Grav. 30 (2013) 235037 | 10.1088/0264-9381/30/23/235037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove existence of vacuum space-times with freely prescribable cone-smooth
initial data on past null infinity.
| [
{
"created": "Mon, 1 Jul 2013 10:29:40 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Oct 2013 13:14:25 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Paetz",
"Tim-Torben",
""
]
] | We prove existence of vacuum space-times with freely prescribable cone-smooth initial data on past null infinity. |
gr-qc/0303071 | Alan D. Rendall | Alan D. Rendall | Fuchsian methods and spacetime singularities | null | Class.Quant.Grav. 21 (2004) S295-S304 | 10.1088/0264-9381/21/3/018 | AEI-2003-035 | gr-qc | null | Fuchsian methods and their applications to the study of the structure of
spacetime singularities are surveyed. The existence question for spacetimes
with compact Cauchy horizons is discussed. After some basic facts concerning
Fuchsian equations have been recalled, various ways in which these equations
have been appli... | [
{
"created": "Wed, 19 Mar 2003 09:31:22 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Rendall",
"Alan D.",
""
]
] | Fuchsian methods and their applications to the study of the structure of spacetime singularities are surveyed. The existence question for spacetimes with compact Cauchy horizons is discussed. After some basic facts concerning Fuchsian equations have been recalled, various ways in which these equations have been applied... |
1911.04253 | S. I. Kruglov | S. I. Kruglov | Dyonic and magnetic black holes with nonlinear arcsin-electrodynamics | 17 pages, 4 figures | Annals Phys. 409 (2019) 167937 | 10.1016/j.aop.2019.167937 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dyonic and magnetic black holes solutions with spherically symmetric
configurations in general relativity are obtained. Black holes possessing
electric and magnetic charges are studied where the source of the gravitational
field is electromagnetic fields obeying the arcsin-electrodynamics. We find
corrections to Coul... | [
{
"created": "Wed, 6 Nov 2019 16:56:38 GMT",
"version": "v1"
}
] | 2019-11-12 | [
[
"Kruglov",
"S. I.",
""
]
] | Dyonic and magnetic black holes solutions with spherically symmetric configurations in general relativity are obtained. Black holes possessing electric and magnetic charges are studied where the source of the gravitational field is electromagnetic fields obeying the arcsin-electrodynamics. We find corrections to Coulom... |
1605.04482 | Tomohiro Nakama | Tomohiro Nakama, Teruaki Suyama | Primordial black holes as a novel probe of primordial gravitational
waves. II: Detailed analysis | 31 pages, accepted in PRD, this paper presents detailed derivations
of the results shown in our recent work 1506.05228 | Phys. Rev. D 94, 043507 (2016) | 10.1103/PhysRevD.94.043507 | RESCEU-19/16 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently we have proposed a novel method to probe primordial gravitational
waves from upper bounds on the abundance of primordial black holes (PBHs). When
the amplitude of primordial tensor perturbations generated in the early
Universe is fairly large, they induce substantial scalar perturbations due to
their second-... | [
{
"created": "Sun, 15 May 2016 01:08:35 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Aug 2016 23:36:47 GMT",
"version": "v2"
}
] | 2016-08-18 | [
[
"Nakama",
"Tomohiro",
""
],
[
"Suyama",
"Teruaki",
""
]
] | Recently we have proposed a novel method to probe primordial gravitational waves from upper bounds on the abundance of primordial black holes (PBHs). When the amplitude of primordial tensor perturbations generated in the early Universe is fairly large, they induce substantial scalar perturbations due to their second-or... |
gr-qc/0411040 | Chang Jun Gao | Chang Jun Gao and Shuang Nan Zhang | Higher Dimensional Reissner-Nordstr\"om-FRW metric | 13 pages | Gen.Rel.Grav. 38 (2006) 23-32 | 10.1007/s10714-005-0207-8 | null | gr-qc astro-ph | null | By inspecting some known solutions to Einstein equations, we present the
metric of higher dimensional Reissner-Nordstr$\ddot{o}$m black hole in the
background of Friedman-Robertson-Walker universe. Then we verify the solution
with a perfect fluid. The discussion of the event horizon of the black hole
reveals that the... | [
{
"created": "Tue, 9 Nov 2004 06:32:27 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Gao",
"Chang Jun",
""
],
[
"Zhang",
"Shuang Nan",
""
]
] | By inspecting some known solutions to Einstein equations, we present the metric of higher dimensional Reissner-Nordstr$\ddot{o}$m black hole in the background of Friedman-Robertson-Walker universe. Then we verify the solution with a perfect fluid. The discussion of the event horizon of the black hole reveals that the s... |
2005.03671 | Pablo Antonio Cano Molina-Ni\~nirola | Pablo A. Cano, Kwinten Fransen and Thomas Hertog | Ringing of rotating black holes in higher-derivative gravity | 62 pages, 13 figures. Computational package provided in the ancillary
files. v2: matches published version | Phys. Rev. D 102, 044047 (2020) | 10.1103/PhysRevD.102.044047 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute scalar quasinormal mode (QNM) frequencies in rotating black hole
solutions of the most general class of higher-derivative gravity theories, to
quartic order in the curvature, that reduce to General Relativity for weak
fields and are compatible with its symmetries. The wave operator governing the
QNMs is no... | [
{
"created": "Thu, 7 May 2020 18:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Oct 2020 12:58:18 GMT",
"version": "v2"
}
] | 2020-10-15 | [
[
"Cano",
"Pablo A.",
""
],
[
"Fransen",
"Kwinten",
""
],
[
"Hertog",
"Thomas",
""
]
] | We compute scalar quasinormal mode (QNM) frequencies in rotating black hole solutions of the most general class of higher-derivative gravity theories, to quartic order in the curvature, that reduce to General Relativity for weak fields and are compatible with its symmetries. The wave operator governing the QNMs is not ... |
gr-qc/0506120 | Akira Tomimatsu | A. Tomimatsu | Distortion of Schwarzschild-anti-de Sitter black holes to black strings | 13 pages, accepted for publication in Physical Review D | Phys.Rev. D71 (2005) 124044 | 10.1103/PhysRevD.71.124044 | null | gr-qc | null | Motivated by the existence of black holes with various topologies in
four-dimensional spacetimes with a negative cosmological constant, we study
axisymmetric static solutions describing any large distortions of
Schwarzschild-anti-de Sitter black holes parametrized by the mass $m$. Under
the approximation such that $m... | [
{
"created": "Sat, 25 Jun 2005 09:45:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Tomimatsu",
"A.",
""
]
] | Motivated by the existence of black holes with various topologies in four-dimensional spacetimes with a negative cosmological constant, we study axisymmetric static solutions describing any large distortions of Schwarzschild-anti-de Sitter black holes parametrized by the mass $m$. Under the approximation such that $m$ ... |
gr-qc/0008031 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Making classical and quantum canonical general relativity computable
through a power series expansion in the inverse cosmological constant | 5 pages, RevTeX with multicol and psfig | Phys.Rev.Lett. 85 (2000) 5272-5275 | 10.1103/PhysRevLett.85.5272 | CGPG-00/8-2 | gr-qc hep-th | null | We consider general relativity with a cosmological constant as a perturbative
expansion around a completely solvable diffeomorphism invariant field theory.
This theory is the $\Lambda\to\infty$ limit of general relativity. This allows
an explicit perturbative computational setup in which the quantum states of the
the... | [
{
"created": "Mon, 14 Aug 2000 20:21:45 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Aug 2000 13:02:05 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We consider general relativity with a cosmological constant as a perturbative expansion around a completely solvable diffeomorphism invariant field theory. This theory is the $\Lambda\to\infty$ limit of general relativity. This allows an explicit perturbative computational setup in which the quantum states of the theor... |
1801.05516 | S Habib Mazharimousavi | S. Danial Forghani, S. Habib Mazharimousavi and M. Halilsoy | Asymmetric Thin-Shell Wormholes | Final version, 10 pages and 9 figures Published in EPJC | Eur. Phys. J. C 78, 469 (2018) | 10.1140/epjc/s10052-018-5776-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spacetime wormholes in isotropic spacetimes are represented traditionally by
embedding diagrams which were symmetric paraboloids. This mirror symmetry,
however, can be broken by considering different sources on different sides of
the throat. This gives rise to an asymmetric thin-shell wormhole, whose
stability is stu... | [
{
"created": "Thu, 11 Jan 2018 06:44:43 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Apr 2018 12:24:18 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jun 2018 09:04:02 GMT",
"version": "v3"
}
] | 2018-06-15 | [
[
"Forghani",
"S. Danial",
""
],
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | Spacetime wormholes in isotropic spacetimes are represented traditionally by embedding diagrams which were symmetric paraboloids. This mirror symmetry, however, can be broken by considering different sources on different sides of the throat. This gives rise to an asymmetric thin-shell wormhole, whose stability is studi... |
1804.00163 | Kenji Ono | Kenji Ono and Kazuhiro Hayama | Bias-free parameter estimation depending on sky region for targeted
gravitational wave | 22 pages, 13 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detection of gravitational waves(GW) involves using the network of GW
telescopes to observe a large sky region. However, owing to the arrangement of
the GW telescopes, even with aLIGO- aVirgo-KAGRA network,parameter estimation
accuracy deteriorates depending on the sky region of the GW source due to the
ill-posed nat... | [
{
"created": "Sat, 31 Mar 2018 12:15:01 GMT",
"version": "v1"
}
] | 2018-04-03 | [
[
"Ono",
"Kenji",
""
],
[
"Hayama",
"Kazuhiro",
""
]
] | Detection of gravitational waves(GW) involves using the network of GW telescopes to observe a large sky region. However, owing to the arrangement of the GW telescopes, even with aLIGO- aVirgo-KAGRA network,parameter estimation accuracy deteriorates depending on the sky region of the GW source due to the ill-posed natur... |
1507.00905 | Muhammad Sharif | M. Sharif and Ayesha Ikram | Warm Inflation in $f(\mathcal{G})$ Theory of Gravity | 22 pages, 8 figures, minor changes | J. Exp. Theor. Phys. 123(2016)40-50 | 10.1134/S1063776116070232 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this paper is to explore warm inflation in the background of
$f(\mathcal{G})$ theory of gravity using scalar fields for the FRW universe
model. We construct the field equations under slow-roll approximations and
evaluate the slow-roll parameters, scalar and tensor power spectra and their
corresponding spec... | [
{
"created": "Wed, 1 Jul 2015 08:01:28 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Aug 2016 03:23:50 GMT",
"version": "v2"
}
] | 2016-09-21 | [
[
"Sharif",
"M.",
""
],
[
"Ikram",
"Ayesha",
""
]
] | The aim of this paper is to explore warm inflation in the background of $f(\mathcal{G})$ theory of gravity using scalar fields for the FRW universe model. We construct the field equations under slow-roll approximations and evaluate the slow-roll parameters, scalar and tensor power spectra and their corresponding spectr... |
1009.5436 | Dah-Wei Chiou | Dah-Wei Chiou | Timeless path integral for relativistic quantum mechanics | 41 pages; more references and comments added; version to appear in
CQG | Class. Quant. Grav. 30, 125004 (2013) | 10.1088/0264-9381/30/12/125004 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the canonical formalism of relativistic (timeless) quantum
mechanics, the formulation of timeless path integral is rigorously derived. The
transition amplitude is reformulated as the sum, or functional integral, over
all possible paths in the constraint surface specified by the (relativistic)
Hamiltonia... | [
{
"created": "Tue, 28 Sep 2010 04:03:57 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Nov 2012 16:00:34 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Nov 2012 08:15:56 GMT",
"version": "v3"
},
{
"created": "Wed, 8 May 2013 10:45:14 GMT",
"version": "v4"
}
] | 2013-05-16 | [
[
"Chiou",
"Dah-Wei",
""
]
] | Starting from the canonical formalism of relativistic (timeless) quantum mechanics, the formulation of timeless path integral is rigorously derived. The transition amplitude is reformulated as the sum, or functional integral, over all possible paths in the constraint surface specified by the (relativistic) Hamiltonian ... |
1609.05069 | David Sloan | Richard Grumitt and David Sloan | Measures in Mutlifield Inflation | 16 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the classical dynamics of multifield inflation models with
quadratic potentials. Such models are shown to have inflationary attractors in
phase space, consistent with the stretching of phase space trajectories along
the volume factor of the universe during inflation. Using the symplectic
structure associat... | [
{
"created": "Fri, 16 Sep 2016 14:15:15 GMT",
"version": "v1"
}
] | 2016-09-19 | [
[
"Grumitt",
"Richard",
""
],
[
"Sloan",
"David",
""
]
] | We examine the classical dynamics of multifield inflation models with quadratic potentials. Such models are shown to have inflationary attractors in phase space, consistent with the stretching of phase space trajectories along the volume factor of the universe during inflation. Using the symplectic structure associated... |
gr-qc/9812061 | Gerhard Rein | Gerhard Rein, Alan D. Rendall | Compact support of spherically symmetric equilibria in non-relativistic
and relativistic galactic dynamics | 23 pages LaTeX2e | Math.Proc.Cambridge Phil.Soc. 128 (2000) 363-380 | 10.1017/S0305004199004193 | null | gr-qc | null | Equilibrium states in galactic dynamics can be described as stationary
solutions of the Vlasov-Poisson system, which is the non-relativistic case, or
of the Vlasov-Einstein system, which is the relativistic case. To obtain
spherically symmetric stationary solutions the distribution function of the
particles (stars) o... | [
{
"created": "Thu, 17 Dec 1998 14:09:32 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Rein",
"Gerhard",
""
],
[
"Rendall",
"Alan D.",
""
]
] | Equilibrium states in galactic dynamics can be described as stationary solutions of the Vlasov-Poisson system, which is the non-relativistic case, or of the Vlasov-Einstein system, which is the relativistic case. To obtain spherically symmetric stationary solutions the distribution function of the particles (stars) on ... |
1201.2964 | Ruslan Vaulin | Rahul Biswas, Patrick R. Brady, Jordi Burguet-Castell, Kipp Cannon,
Jessica Clayton, Alexander Dietz, Nickolas Fotopoulos, Lisa M. Goggin, Drew
Keppel, Chris Pankow, Larry R. Price and Ruslan Vaulin | Detecting transient gravitational waves in non-Gaussian noise with
partially redundant analysis methods | 11 pages, 5 figures | null | 10.1103/PhysRevD.85.122009 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a broad class of astrophysical sources that produce detectable,
transient, gravitational waves. Some searches for transient gravitational waves
are tailored to known features of these sources. Other searches make few
assumptions about the sources. Typically events are observable with multiple
search techniqu... | [
{
"created": "Fri, 13 Jan 2012 21:55:35 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Apr 2012 04:25:53 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Biswas",
"Rahul",
""
],
[
"Brady",
"Patrick R.",
""
],
[
"Burguet-Castell",
"Jordi",
""
],
[
"Cannon",
"Kipp",
""
],
[
"Clayton",
"Jessica",
""
],
[
"Dietz",
"Alexander",
""
],
[
"Fotopoulos",
"Nickolas",
... | There is a broad class of astrophysical sources that produce detectable, transient, gravitational waves. Some searches for transient gravitational waves are tailored to known features of these sources. Other searches make few assumptions about the sources. Typically events are observable with multiple search techniques... |
gr-qc/0202050 | Banibrata Mukhopadhyay | Banibrata Mukhopadhyay | Dynamics of electromagnetic waves in Kerr geometry | 15 Latex pages, 4 Figures; Accepted for publication in Classical and
Quantum Gravity | Class.Quant.Grav. 19 (2002) 2307-2318 | 10.1088/0264-9381/19/8/317 | null | gr-qc astro-ph | null | Here we are interested to study the spin-1 particle i.e., electro-magnetic
wave in curved space-time, say around black hole. After separating the
equations into radial and angular parts, writing them according to the black
hole geometry, say, Kerr black hole we solve them analytically. Finally we
produce complete sol... | [
{
"created": "Thu, 14 Feb 2002 18:12:01 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Mukhopadhyay",
"Banibrata",
""
]
] | Here we are interested to study the spin-1 particle i.e., electro-magnetic wave in curved space-time, say around black hole. After separating the equations into radial and angular parts, writing them according to the black hole geometry, say, Kerr black hole we solve them analytically. Finally we produce complete solut... |
2001.10819 | Konstantin Bayandin | K. V. Bayandin | Causal discrete field theory for quantum gravity | 18 pages, 12 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The proposed theory of causally structured discrete fields studies integer
values on directed edges of a self-similar graph with a propagation rule, which
we define as a set of valid combinations of integer values and edge directions
around any vertex of the graph. There is an infinite countable number of
variants of... | [
{
"created": "Sun, 26 Jan 2020 18:38:36 GMT",
"version": "v1"
}
] | 2020-01-30 | [
[
"Bayandin",
"K. V.",
""
]
] | The proposed theory of causally structured discrete fields studies integer values on directed edges of a self-similar graph with a propagation rule, which we define as a set of valid combinations of integer values and edge directions around any vertex of the graph. There is an infinite countable number of variants of t... |
0908.1063 | Mark Hannam | Mark Hannam, Sascha Husa, Niall \'O Murchadha | Bowen-York trumpet data and black-hole simulations | 15 pages, 14 figures. Published version | Phys.Rev.D80:124007,2009 | 10.1103/PhysRevD.80.124007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The most popular method to construct initial data for black-hole-binary
simulations is the puncture method, in which compactified wormholes are given
linear and angular momentum via the Bowen-York extrinsic curvature. When these
data are evolved, they quickly approach a ``trumpet'' topology, suggesting that
it would ... | [
{
"created": "Fri, 7 Aug 2009 14:42:37 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Aug 2009 12:52:40 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Aug 2009 14:39:47 GMT",
"version": "v3"
},
{
"created": "Fri, 4 Dec 2009 15:21:03 GMT",
"version": "v4"
}
] | 2009-12-14 | [
[
"Hannam",
"Mark",
""
],
[
"Husa",
"Sascha",
""
],
[
"Murchadha",
"Niall Ó",
""
]
] | The most popular method to construct initial data for black-hole-binary simulations is the puncture method, in which compactified wormholes are given linear and angular momentum via the Bowen-York extrinsic curvature. When these data are evolved, they quickly approach a ``trumpet'' topology, suggesting that it would be... |
0809.1225 | SangChul Yoon | SangChul Yoon | Anomaly-free representations of the holonomy-flux algebra | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We work on the uniqueness, gr-qc/0504147, of representations of the
holonomy-flux algebra in loop quantum gravity. We argue that for analytic
diffeomorphisms, the flux operators can be only constants as functions on the
configuration space in representations with no anomaly, which are zero in the
standard representat... | [
{
"created": "Sun, 7 Sep 2008 14:58:27 GMT",
"version": "v1"
}
] | 2017-07-03 | [
[
"Yoon",
"SangChul",
""
]
] | We work on the uniqueness, gr-qc/0504147, of representations of the holonomy-flux algebra in loop quantum gravity. We argue that for analytic diffeomorphisms, the flux operators can be only constants as functions on the configuration space in representations with no anomaly, which are zero in the standard representatio... |
gr-qc/0012099 | Marc Mars | Marc Mars, Jose M. M. Senovilla, Raul Vera | Signature Change on the Brane | RevTeX, 4 pages, 1 figure. Uses epsfig package. Slightly shorter
version to match the published version. Reference added | Phys.Rev.Lett. 86 (2001) 4219-4222 | 10.1103/PhysRevLett.86.4219 | null | gr-qc hep-th | null | We explore the possibility of having a good description of classical
signature change in the brane scenario.
| [
{
"created": "Wed, 27 Dec 2000 16:01:43 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Apr 2001 14:06:39 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Mars",
"Marc",
""
],
[
"Senovilla",
"Jose M. M.",
""
],
[
"Vera",
"Raul",
""
]
] | We explore the possibility of having a good description of classical signature change in the brane scenario. |
1410.3131 | Babak Vakili | Babak Vakili | A late time accelerated FRW model with scalar and vector fields via
Noether symmetry | 9 pages, 2 figures, typos corrected, Refs. added | Phys. Lett. B 738 (2014) 488 | 10.1016/j.physletb.2014.10.028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of a three-dimensional minisuperspace cosmological
model by the Noether symmetry approach. The phase space variables turn out to
correspond to the scale factor of a flat Friedmann-Robertson-Walker (FRW)
model, a scalar field with potential function $V(\phi)$ with which the gravity
part of the a... | [
{
"created": "Sun, 12 Oct 2014 18:20:23 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Oct 2014 16:25:44 GMT",
"version": "v2"
}
] | 2015-12-30 | [
[
"Vakili",
"Babak",
""
]
] | We study the evolution of a three-dimensional minisuperspace cosmological model by the Noether symmetry approach. The phase space variables turn out to correspond to the scale factor of a flat Friedmann-Robertson-Walker (FRW) model, a scalar field with potential function $V(\phi)$ with which the gravity part of the act... |
gr-qc/0701162 | Kentaro Somiya | K. Somiya, Y. Chen, S. Kawamura, and N. Mio | Frequency noise and intensity noise of next-generation
gravitational-wave detectors with RF/DC readout schemes | An error in Fig. 10 in the published version in PRD has been
corrected in this version; an erratum has been submitted to PRD. After
correction, this figure reflects a significant difference in the ways RF and
DC readout schemes are susceptible to laser noise. In addition, the levels of
mirror loss imbalances an... | Phys.Rev.D73:122005,2006; Erratum-ibid.D75:049905,2007 | 10.1103/PhysRevD.73.122005 10.1103/PhysRevD.75.049905 | null | gr-qc | null | The sensitivity of next-generation gravitational-wave detectors such as
Advanced LIGO and LCGT should be limited mostly by quantum noise with an
expected technical progress to reduce seismic noise and thermal noise. Those
detectors will employ the optical configuration of resonant-sideband-extraction
that can be real... | [
{
"created": "Mon, 29 Jan 2007 17:36:29 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Somiya",
"K.",
""
],
[
"Chen",
"Y.",
""
],
[
"Kawamura",
"S.",
""
],
[
"Mio",
"N.",
""
]
] | The sensitivity of next-generation gravitational-wave detectors such as Advanced LIGO and LCGT should be limited mostly by quantum noise with an expected technical progress to reduce seismic noise and thermal noise. Those detectors will employ the optical configuration of resonant-sideband-extraction that can be realiz... |
gr-qc/0112036 | Ettore Minguzzi | Ettore Minguzzi | Gauge invariance in teleparallel gravity theories: A solution to the
background structure problem | RevTex, 5 pages, sign errors corrected. Section 2 enlarged | Phys.Rev. D65 (2002) 084048 | 10.1103/PhysRevD.65.084048 | null | gr-qc | null | We deal with the problem of identifying a background structure and its
perturbation in tetrad theories of gravity. Starting from a peculiar trivial
principal bundle we define a metric which depends only on the gauge connection.
We find the allowed four-dimensional structure groups; two of them turn out to
be the tran... | [
{
"created": "Sun, 16 Dec 2001 17:51:02 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Dec 2001 18:06:10 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Minguzzi",
"Ettore",
""
]
] | We deal with the problem of identifying a background structure and its perturbation in tetrad theories of gravity. Starting from a peculiar trivial principal bundle we define a metric which depends only on the gauge connection. We find the allowed four-dimensional structure groups; two of them turn out to be the transl... |
gr-qc/9712098 | Gian Paolo Vacca | F. Finelli, G. P. Vacca, G. Venturi | Chaotic inflation with a scalar field in non-classical states | 19 pages, 9 postscript figures, latex. Final version as accepted for
publication on Phys. Rev. D | Phys.Rev.D58:103514,1998 | 10.1103/PhysRevD.58.103514 | null | gr-qc astro-ph hep-ph | null | We study chaotic inflation driven by a real, massive, homogeneous minimally
coupled scalar field in a flat Robertson-Walker spacetime. The semiclassical
limit for gravity is considered, whereas the scalar field is treated quantum
mechanically by the technique of invariants in order to also investigate the
dynamics of... | [
{
"created": "Mon, 29 Dec 1997 15:23:24 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Sep 1998 11:43:38 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Finelli",
"F.",
""
],
[
"Vacca",
"G. P.",
""
],
[
"Venturi",
"G.",
""
]
] | We study chaotic inflation driven by a real, massive, homogeneous minimally coupled scalar field in a flat Robertson-Walker spacetime. The semiclassical limit for gravity is considered, whereas the scalar field is treated quantum mechanically by the technique of invariants in order to also investigate the dynamics of t... |
gr-qc/0504031 | Roland Triay | R. Triay | An Issue to the Cosmological Constant Problem | 7 pages | null | null | null | gr-qc | null | According to general relativity, the present analysis shows on geometrical
grounds that the cosmological constant problem is an artifact due to the
unfounded link of this fundamental constant to vacuum energy density of quantum
fluctuations.
| [
{
"created": "Thu, 7 Apr 2005 16:11:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Triay",
"R.",
""
]
] | According to general relativity, the present analysis shows on geometrical grounds that the cosmological constant problem is an artifact due to the unfounded link of this fundamental constant to vacuum energy density of quantum fluctuations. |
2206.09081 | Umananda Dev Goswami | Ronit Karmakar, Dhruba Jyoti Gogoi and Umananda Dev Goswami | Quasinormal modes and thermodynamic properties of GUP-corrected
Schwarzschild black hole surrounded by quintessence | 17 pages, 9 figures. Published version | International Journal of Modern Physics A, Vol. 37, No. 28 & 29,
2250180 (2022) | 10.1142/S0217751X22501809 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Quasinormal Modes (QNMs) of the Schwarzschild black hole
surrounded by a quintessence field after implementing the quantum corrections
to its solution as required by the Generalised Uncertainty Principle (GUP). We
analyse the dependence of the QNMs on the deformation parameters of GUP as well
as on the q... | [
{
"created": "Sat, 18 Jun 2022 01:32:41 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Dec 2022 05:20:09 GMT",
"version": "v2"
}
] | 2023-01-02 | [
[
"Karmakar",
"Ronit",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We study the Quasinormal Modes (QNMs) of the Schwarzschild black hole surrounded by a quintessence field after implementing the quantum corrections to its solution as required by the Generalised Uncertainty Principle (GUP). We analyse the dependence of the QNMs on the deformation parameters of GUP as well as on the qui... |
1402.1846 | Tomi Koivisto | Jose Beltran Jimenez, Tomi S. Koivisto | Extended Gauss-Bonnet gravities in Weyl geometry | 15 pages, no figures | null | 10.1088/0264-9381/31/13/135002 | NORDITA-2014-14 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider an extended Gauss-Bonnet gravity theory in
arbitrary dimensions and in a space provided with a Weyl connection, which is
torsionless but not metric-compatible, the non-metricity tensor being
determined by a vector field. The considered action consists of the usual
Einstein-Hilbert action plu... | [
{
"created": "Sat, 8 Feb 2014 12:23:25 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Jimenez",
"Jose Beltran",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | In this paper we consider an extended Gauss-Bonnet gravity theory in arbitrary dimensions and in a space provided with a Weyl connection, which is torsionless but not metric-compatible, the non-metricity tensor being determined by a vector field. The considered action consists of the usual Einstein-Hilbert action plus ... |
1006.1613 | Bipin Chandra Tewari | B. C. Tewari And Mamta Joshi Pant | A new parametric class of exact solutions in general relativity
representing perfect static fluid balls | 11 pages, 3 tables | null | null | 123abc | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new parametric class of spherically symmetric analytic solutions
of the general relativistic field equations in canonical coordinates, which
corresponds to causal models of perfect fluid balls. These solutions describe
perfect fluid balls with infinite central pressure and infinite central density
though... | [
{
"created": "Tue, 8 Jun 2010 17:07:22 GMT",
"version": "v1"
}
] | 2010-06-09 | [
[
"Pant",
"B. C. Tewari And Mamta Joshi",
""
]
] | We present a new parametric class of spherically symmetric analytic solutions of the general relativistic field equations in canonical coordinates, which corresponds to causal models of perfect fluid balls. These solutions describe perfect fluid balls with infinite central pressure and infinite central density though t... |
1806.06767 | Nils A. Nilsson | Nils A. Nilsson, Mariusz P. Dabrowski | Cosmology in a toy model of Lorentz breaking gravity | 3 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore cosmological solutions to Lorentz breaking gravity using the
gravitational sector of the Standard Model Extension (SME). By using a simple
toy model for Lorentz violation and under the assumption that the so-called
$\mathfrak{T}$-tensor is covariantly constant, we show that the gravity sector
SME influence... | [
{
"created": "Mon, 18 Jun 2018 15:22:57 GMT",
"version": "v1"
}
] | 2018-06-19 | [
[
"Nilsson",
"Nils A.",
""
],
[
"Dabrowski",
"Mariusz P.",
""
]
] | We explore cosmological solutions to Lorentz breaking gravity using the gravitational sector of the Standard Model Extension (SME). By using a simple toy model for Lorentz violation and under the assumption that the so-called $\mathfrak{T}$-tensor is covariantly constant, we show that the gravity sector SME influences ... |
2310.12476 | Ardian Nata Atmaja | Ardian Nata Atmaja | Bogomol'nyi-like Equations in Gravity Theories | 17 pages, 4 figures, adding new scalar hair black holes in three and
four dimensional spacetime. Comments are welcome | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the BPS Lagrangian method, we show that gravity theory coupled to
matter in various dimensions may possess Bogomol'nyi-like equations, which are
first-order differential equations, satisfying the Einstein equations and the
Euler-Lagrange equations of classical fields ($U(1)$ gauge and scalar fields).
In particu... | [
{
"created": "Thu, 19 Oct 2023 05:24:00 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Nov 2023 06:55:28 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Dec 2023 12:50:07 GMT",
"version": "v3"
}
] | 2023-12-11 | [
[
"Atmaja",
"Ardian Nata",
""
]
] | Using the BPS Lagrangian method, we show that gravity theory coupled to matter in various dimensions may possess Bogomol'nyi-like equations, which are first-order differential equations, satisfying the Einstein equations and the Euler-Lagrange equations of classical fields ($U(1)$ gauge and scalar fields). In particula... |
1112.0475 | Diego Rubiera-Garcia | Gonzalo J. Olmo and D. Rubiera-Garcia | Nonsingular black holes in quadratic Palatini gravity | 5 pages, 1 figure, revtex4-1 class; revised version, title changed,
minor changes in text, equations and references | null | 10.1140/epjc/s10052-012-2098-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find that if general relativity is modified at the Planck scale by a
Ricci-squared term, electrically charged black holes may be nonsingular. These
objects concentrate their mass in a microscopic sphere of radius
$r_{core}\approx N_q^{1/2}l_P/3$, where $l_P$ is the Planck length and $N_q$ is
the number of electric... | [
{
"created": "Fri, 2 Dec 2011 14:51:08 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jul 2012 10:39:41 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | We find that if general relativity is modified at the Planck scale by a Ricci-squared term, electrically charged black holes may be nonsingular. These objects concentrate their mass in a microscopic sphere of radius $r_{core}\approx N_q^{1/2}l_P/3$, where $l_P$ is the Planck length and $N_q$ is the number of electric c... |
1704.00728 | Elliot Nelson | Elliot Nelson and C. Jess Riedel | Classical Entanglement Structure in the Wavefunction of Inflationary
Fluctuations | 5 pages, 1 figure. v2: published version. Results superseded by
arXiv:1711.05719. Honorable Mention in the 2017 Gravity Research Foundation
Essay Competition | null | 10.1142/S0218271817430064 | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the preferred classical variables that emerge from a pure
quantum state are determined by its entanglement structure in the form of
redundant records: information shared between many subsystems. Focusing on the
early universe, we ask how classical metric perturbations emerge from vacuum
fluctuations in ... | [
{
"created": "Mon, 3 Apr 2017 18:00:00 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Dec 2017 19:02:57 GMT",
"version": "v2"
}
] | 2017-12-13 | [
[
"Nelson",
"Elliot",
""
],
[
"Riedel",
"C. Jess",
""
]
] | We argue that the preferred classical variables that emerge from a pure quantum state are determined by its entanglement structure in the form of redundant records: information shared between many subsystems. Focusing on the early universe, we ask how classical metric perturbations emerge from vacuum fluctuations in an... |
gr-qc/0505119 | M. D. Maia | M. D. Maia | Information Storage in Black Holes | 5 pages Latex file, no figures. A honourable mention in the 2005 GRF
essay competition | Int.J.Mod.Phys.D14:2251-2256,2005 | 10.1142/S0218271805007838 | null | gr-qc | null | The information loss paradox for Schwarzschild black holes is examined, using
the ADS/CFT correspondence extended to the $M_6 (4,2)$ bulk. It is found that
the only option compatible with the preservation of the quantum unitarity is
when a regular remnant region of the black hole survives to the black hole
evaporatio... | [
{
"created": "Mon, 23 May 2005 18:17:56 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Maia",
"M. D.",
""
]
] | The information loss paradox for Schwarzschild black holes is examined, using the ADS/CFT correspondence extended to the $M_6 (4,2)$ bulk. It is found that the only option compatible with the preservation of the quantum unitarity is when a regular remnant region of the black hole survives to the black hole evaporation ... |
0910.2840 | Andrea Geralico | Donato Bini, Christian Cherubini, Simonetta Filippi and Andrea
Geralico | Extended bodies with quadrupole moment interacting with gravitational
monopoles: reciprocity relations | 14 pages, Latex svjour2.cls article class, 7 eps figure files. To
appear on General Relativity and Gravitation, 2009 | Gen.Rel.Grav.41:2781-2795,2009 | 10.1007/s10714-009-0807-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact solution of Einstein's equations representing the static
gravitational field of a quasi-spherical source endowed with both mass and mass
quadrupole moment is considered. It belongs to the Weyl class of solutions and
reduces to the Schwarzschild solution when the quadrupole moment vanishes. The
geometric prop... | [
{
"created": "Thu, 15 Oct 2009 11:11:53 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Bini",
"Donato",
""
],
[
"Cherubini",
"Christian",
""
],
[
"Filippi",
"Simonetta",
""
],
[
"Geralico",
"Andrea",
""
]
] | An exact solution of Einstein's equations representing the static gravitational field of a quasi-spherical source endowed with both mass and mass quadrupole moment is considered. It belongs to the Weyl class of solutions and reduces to the Schwarzschild solution when the quadrupole moment vanishes. The geometric proper... |
1412.6479 | Sarah Caudill | Paul T. Baker, Sarah Caudill, Kari A. Hodge, Dipongkar Talukder,
Collin Capano, Neil J. Cornish | Multivariate Classification with Random Forests for Gravitational Wave
Searches of Black Hole Binary Coalescence | null | null | 10.1103/PhysRevD.91.062004 | LIGO Document P1400231 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searches for gravitational waves produced by coalescing black hole binaries
with total masses $\gtrsim25\,$M$_\odot$ use matched filtering with templates
of short duration. Non-Gaussian noise bursts in gravitational wave detector
data can mimic short signals and limit the sensitivity of these searches.
Previous searc... | [
{
"created": "Fri, 19 Dec 2014 18:44:21 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Baker",
"Paul T.",
""
],
[
"Caudill",
"Sarah",
""
],
[
"Hodge",
"Kari A.",
""
],
[
"Talukder",
"Dipongkar",
""
],
[
"Capano",
"Collin",
""
],
[
"Cornish",
"Neil J.",
""
]
] | Searches for gravitational waves produced by coalescing black hole binaries with total masses $\gtrsim25\,$M$_\odot$ use matched filtering with templates of short duration. Non-Gaussian noise bursts in gravitational wave detector data can mimic short signals and limit the sensitivity of these searches. Previous searche... |
1212.1704 | Miguel Cruz | Miguel Cruz and Efra\'in Rojas | Born-Infeld extension of Lovelock brane gravity | 14 pages, no figures. Substantial changes, references added.
Published in CQG | Class. Quantum Grav. 30 (2013) 115012 | 10.1088/0264-9381/30/11/115012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a Born-Infeld type theory to describe the evolution of p-branes
propagating in an N = (p+2)-dimensional Minkowski spacetime. The expansion of
the BI-type volume element gives rise to the (p+1) Lovelock brane invariants
associated with the worldvolume swept out by the brane. Contrary to the
Lovelock theory ... | [
{
"created": "Fri, 7 Dec 2012 20:47:16 GMT",
"version": "v1"
},
{
"created": "Wed, 8 May 2013 01:54:44 GMT",
"version": "v2"
}
] | 2013-05-09 | [
[
"Cruz",
"Miguel",
""
],
[
"Rojas",
"Efraín",
""
]
] | We present a Born-Infeld type theory to describe the evolution of p-branes propagating in an N = (p+2)-dimensional Minkowski spacetime. The expansion of the BI-type volume element gives rise to the (p+1) Lovelock brane invariants associated with the worldvolume swept out by the brane. Contrary to the Lovelock theory in... |
gr-qc/9806108 | Hideki Asada | Hideki Asada and Toshifumi Futamase | Post-Newtonian Approximation | 59 pages, ptptex file; published in Progress of Theoretical Physics
Supplement, No.128, pages 123-181 (1997) | Prog.Theor.Phys.Suppl.128:123-181,1997 | 10.1143/PTPS.128.123 | null | gr-qc | null | We discuss various aspects of the post-Newtonian approximation in general
relativity. After presenting the foundation based on the Newtonian limit, we
use the (3+1) formalism to formulate the post-Newtonian approximation for the
perfect fluid. As an application we show the method for constructing the
equilibrium conf... | [
{
"created": "Sat, 27 Jun 1998 05:48:46 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Asada",
"Hideki",
""
],
[
"Futamase",
"Toshifumi",
""
]
] | We discuss various aspects of the post-Newtonian approximation in general relativity. After presenting the foundation based on the Newtonian limit, we use the (3+1) formalism to formulate the post-Newtonian approximation for the perfect fluid. As an application we show the method for constructing the equilibrium config... |
2007.03947 | Indrani Banerjee | Indrani Banerjee, Bhaswati Mandal and Soumitra SenGupta | Signatures of Einstein-Maxwell dilaton-axion gravity from the observed
jet power and the radiative efficiency | Matches published version | Phys. Rev. D 103, 044046 (2021) | 10.1103/PhysRevD.103.044046 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Maxwell dilaton-axion (EMDA) gravity arises in the low energy
effective action of the heterotic string theory and provides a simple framework
to explore the signatures of the same. The dilaton and the axion fields
inherited in the action from string compactifications have interesting
consequences in infl... | [
{
"created": "Wed, 8 Jul 2020 08:12:39 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Feb 2021 02:05:24 GMT",
"version": "v2"
}
] | 2021-03-02 | [
[
"Banerjee",
"Indrani",
""
],
[
"Mandal",
"Bhaswati",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | The Einstein-Maxwell dilaton-axion (EMDA) gravity arises in the low energy effective action of the heterotic string theory and provides a simple framework to explore the signatures of the same. The dilaton and the axion fields inherited in the action from string compactifications have interesting consequences in inflat... |
2205.15432 | Andrey A. Shoom | Andrey A. Shoom, Sumit Kumar, N. V. Krishnendu | Constraining mass of the graviton with GW170817 | 9 pages, 6 figures | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | We consider the massive graviton phenomenological model based on the
graviton's dispersion terms included into phase of gravitational wave's
waveform. Such model was already considered in many works but it was based on a
single leading-order dispersion term only. Here we derive a relation between
relativistic gravito... | [
{
"created": "Mon, 30 May 2022 21:18:21 GMT",
"version": "v1"
}
] | 2022-06-01 | [
[
"Shoom",
"Andrey A.",
""
],
[
"Kumar",
"Sumit",
""
],
[
"Krishnendu",
"N. V.",
""
]
] | We consider the massive graviton phenomenological model based on the graviton's dispersion terms included into phase of gravitational wave's waveform. Such model was already considered in many works but it was based on a single leading-order dispersion term only. Here we derive a relation between relativistic gravitons... |
gr-qc/0507114 | Atsushi Taruya | Atsushi Taruya, Hideaki Kudoh | Probing anisotropies of gravitational-wave backgroundswith a space-based
interferometer II: Perturbative reconstruction of a low-frequency skymap | 23 pages, 12 figures, Phys.Rev.D (2005) in press | Phys.Rev. D72 (2005) 104015 | 10.1103/PhysRevD.72.104015 | null | gr-qc astro-ph | null | We present a perturbative reconstruction method to make a skymap of
gravitational-wave backgrounds (GWBs) observed via space-based interferometer.
In the presence of anisotropies in GWBs, the cross-correlated signals of
observed GWBs are inherently time-dependent due to the non-stationarity of the
gravitational-wave ... | [
{
"created": "Wed, 27 Jul 2005 08:04:46 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Nov 2005 03:56:49 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Taruya",
"Atsushi",
""
],
[
"Kudoh",
"Hideaki",
""
]
] | We present a perturbative reconstruction method to make a skymap of gravitational-wave backgrounds (GWBs) observed via space-based interferometer. In the presence of anisotropies in GWBs, the cross-correlated signals of observed GWBs are inherently time-dependent due to the non-stationarity of the gravitational-wave de... |
2312.05998 | Seyed Mohammad Ahmadi | S. Mohammad Ahmadi, Nahid Ahmadi, and Mehdi Shokri | Analytical Insights into Constant-Roll Condition: Extending the Paradigm
to Non-Canonical Models | 40 pages, 12 figures; v3, JCAP version | JCAP 05(2024)005 | 10.1088/1475-7516/2024/05/005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore the prospect of generalizing the constant-roll
condition in canonical inflationary model to non-canonical models. To find a
natural generalization, we focus on three manifestations of this condition and
construct constant-roll models corresponding to each manifestation. These
models are not e... | [
{
"created": "Sun, 10 Dec 2023 21:19:13 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2024 16:46:21 GMT",
"version": "v2"
},
{
"created": "Sat, 4 May 2024 22:12:22 GMT",
"version": "v3"
}
] | 2024-05-07 | [
[
"Ahmadi",
"S. Mohammad",
""
],
[
"Ahmadi",
"Nahid",
""
],
[
"Shokri",
"Mehdi",
""
]
] | In this work, we explore the prospect of generalizing the constant-roll condition in canonical inflationary model to non-canonical models. To find a natural generalization, we focus on three manifestations of this condition and construct constant-roll models corresponding to each manifestation. These models are not equ... |
1001.3031 | Paolo Pani | Paolo Pani, Emanuele Berti, Vitor Cardoso, Yanbei Chen, Richard Norte | Gravitational-wave signatures of the absence of an event horizon. II.
Extreme mass ratio inspirals in the spacetime of a thin-shell gravastar | 10 pages, 7 figures | Phys.Rev.D81:084011,2010 | 10.1103/PhysRevD.81.084011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study gravitational-wave emission from the quasi-circular, extreme mass
ratio inspiral of compact objects of mass m0 into massive objects of mass M>>m0
whose external metric is identical to the Schwarzschild metric, except for the
absence of an event horizon. To be specific we consider one of the simplest
realizat... | [
{
"created": "Mon, 18 Jan 2010 13:32:51 GMT",
"version": "v1"
}
] | 2010-04-14 | [
[
"Pani",
"Paolo",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Chen",
"Yanbei",
""
],
[
"Norte",
"Richard",
""
]
] | We study gravitational-wave emission from the quasi-circular, extreme mass ratio inspiral of compact objects of mass m0 into massive objects of mass M>>m0 whose external metric is identical to the Schwarzschild metric, except for the absence of an event horizon. To be specific we consider one of the simplest realizatio... |
1503.05020 | Javad Taghizadeh Firouzjaee | Javad T. Firouzjaee and George F. R. Ellis | Particle creation from the quantum stress tensor | 26 pages,4 figures, 2 tables. arXiv admin note: substantial text
overlap with arXiv:0705.4012 by other authors | null | 10.1103/PhysRevD.91.103002 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/3.0/ | Among the different methods to derive particle creation, finding the quantum
stress tensor expectation value gives a covariant quantity which can be used
for examining the back-reaction issue. However this tensor also includes vacuum
polarization in a way that depends on the vacuum chosen. Here we review
different as... | [
{
"created": "Tue, 17 Mar 2015 12:43:07 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Firouzjaee",
"Javad T.",
""
],
[
"Ellis",
"George F. R.",
""
]
] | Among the different methods to derive particle creation, finding the quantum stress tensor expectation value gives a covariant quantity which can be used for examining the back-reaction issue. However this tensor also includes vacuum polarization in a way that depends on the vacuum chosen. Here we review different aspe... |
0806.2273 | Matyas Vasuth | J\'anos Maj\'ar and M\'aty\'as Vas\'uth | Gravitational waveforms for spinning compact binaries | null | Phys.Rev.D77:104005,2008 | 10.1103/PhysRevD.77.104005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The rotation of the bodies and the eccentricity of the orbit have significant
effects on the emitted gravitational radiation of binary systems. This work
focuses on the evaluation of the gravitational wave polarization states for
spinning compact binaries. We consider binaries on eccentric orbits and the
spin-orbit i... | [
{
"created": "Fri, 13 Jun 2008 16:04:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Majár",
"János",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | The rotation of the bodies and the eccentricity of the orbit have significant effects on the emitted gravitational radiation of binary systems. This work focuses on the evaluation of the gravitational wave polarization states for spinning compact binaries. We consider binaries on eccentric orbits and the spin-orbit int... |
0904.2928 | Peter K.F. Kuhfittig | Peter K. F. Kuhfittig | An unexpected topological censor | 5 pages, 1 figure | Fundamental J. Math. Phys., 1, 31-40 (2011) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Morris-Thorne wormholes with a cosmological constant \Lambda have been
studied extensively, even allowing \Lambda to be replaced by a space variable
scalar. These wormholes cannot exist, however, if \Lambda is both space and
time dependent. Such a \Lambda will therefore act as a topological censor.
While not likely t... | [
{
"created": "Sun, 19 Apr 2009 18:58:50 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2009 12:59:49 GMT",
"version": "v2"
},
{
"created": "Sun, 20 Dec 2009 19:49:44 GMT",
"version": "v3"
},
{
"created": "Wed, 30 Mar 2011 17:20:10 GMT",
"version": "v4"
},
{
"c... | 2011-12-21 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | Morris-Thorne wormholes with a cosmological constant \Lambda have been studied extensively, even allowing \Lambda to be replaced by a space variable scalar. These wormholes cannot exist, however, if \Lambda is both space and time dependent. Such a \Lambda will therefore act as a topological censor. While not likely to ... |
2111.05878 | Surajit Kalita | Surajit Kalita, T. R. Govindarajan and Banibrata Mukhopadhyay | Natural evidence for fuzzy sphere noncommutative geometry:
super-Chandrasekhar white dwarfs | 7 pages including 3 figures; based on the talk given in the parallel
session "Quantum Gravity Phenomenology" in the Sixteenth Marcel Grossmann
Meeting held online during July 5-10, 2021; to appear in the proceedings of
Sixteenth Marcel Grossmann Meeting | null | 10.1142/9789811269776_0346 | null | gr-qc astro-ph.HE hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Noncommutative geometry is one of the quantum gravity theories, which various
researchers have been using to describe different physical and astrophysical
systems. However, so far, no direct observations can justify its existence, and
this theory remains a hypothesis. On the other hand, over the past two decades,
mor... | [
{
"created": "Wed, 10 Nov 2021 19:00:18 GMT",
"version": "v1"
}
] | 2023-01-27 | [
[
"Kalita",
"Surajit",
""
],
[
"Govindarajan",
"T. R.",
""
],
[
"Mukhopadhyay",
"Banibrata",
""
]
] | Noncommutative geometry is one of the quantum gravity theories, which various researchers have been using to describe different physical and astrophysical systems. However, so far, no direct observations can justify its existence, and this theory remains a hypothesis. On the other hand, over the past two decades, more ... |
0906.1768 | Aseem Paranjape | Aseem Paranjape, T. Padmanabhan | Radiation from collapsing shells, semiclassical backreaction and black
hole formation | 26 pages, 6 figures, revtex4; v2 -- minor reformatting, some typos
fixed, one reference added, to appear in PRD | Phys.Rev.D80:044011,2009 | 10.1103/PhysRevD.80.044011 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a detailed analysis of quantum field theory around a collapsing
shell and discuss several conceptual issues related to the emission of
radiation flux and formation of black holes. Explicit calculations are
performed using a model for a collapsing shell which turns out to be
analytically solvable. We use th... | [
{
"created": "Tue, 9 Jun 2009 16:04:16 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jul 2009 10:10:18 GMT",
"version": "v2"
}
] | 2009-11-19 | [
[
"Paranjape",
"Aseem",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We provide a detailed analysis of quantum field theory around a collapsing shell and discuss several conceptual issues related to the emission of radiation flux and formation of black holes. Explicit calculations are performed using a model for a collapsing shell which turns out to be analytically solvable. We use the ... |
1503.02726 | Kent Yagi | Kent Yagi and Nicolas Yunes | I-Love-Q anisotropically: Universal relations for compact stars with
scalar pressure anisotropy | 22 pages, 12 figures; v2: minor modifications, references added and
updated, published in PRD; v3: several typos corrected; v4: minor typo in
(38) corrected | Phys. Rev. D 91, 123008 (2015) | 10.1103/PhysRevD.91.123008 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Certain physical quantities that characterize neutron stars and quark stars
(e.g. their mass, spin angular momentum and quadrupole moment) are interrelated
in a way that is approximately insensitive to their internal structure. Such
approximately universal relations are useful to break degeneracies in data
analysis f... | [
{
"created": "Mon, 9 Mar 2015 23:06:20 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jul 2015 20:44:26 GMT",
"version": "v2"
},
{
"created": "Thu, 23 May 2024 16:19:36 GMT",
"version": "v3"
},
{
"created": "Mon, 22 Jul 2024 02:12:10 GMT",
"version": "v4"
}
] | 2024-07-23 | [
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Certain physical quantities that characterize neutron stars and quark stars (e.g. their mass, spin angular momentum and quadrupole moment) are interrelated in a way that is approximately insensitive to their internal structure. Such approximately universal relations are useful to break degeneracies in data analysis for... |
0911.3745 | Aurelien Barrau | Aurelien Barrau | Loop quantum gravity and the CMB: toward pre-Big Bounce cosmology | Proceedings of the 12th Marcel Grossman Meeting on General
Relativity. 3 pages, no figure | null | 10.1142/9789814374552_0495 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This brief article sums up the possible imprints of loop quantum gravity
effects on the cosmological microwave background. We focus on semi-classical
terms and show that "Big Bounce" corrections, together with the "pre Big
Bounce" state, could modify the observed spectrum.
| [
{
"created": "Thu, 19 Nov 2009 10:04:36 GMT",
"version": "v1"
}
] | 2018-12-19 | [
[
"Barrau",
"Aurelien",
""
]
] | This brief article sums up the possible imprints of loop quantum gravity effects on the cosmological microwave background. We focus on semi-classical terms and show that "Big Bounce" corrections, together with the "pre Big Bounce" state, could modify the observed spectrum. |
2401.18066 | Xiang-Qian Li | Xiang-Qian Li, Hao-Peng Yan, Xiao-Jun Yue, Shi-Wei Zhou, Qiang Xu | Geodesic structure, shadow and optical appearance of black hole immersed
in Chaplygin-like dark fluid | 35 pages, 15 figures. Discussions added | JCAP 05 (2024) 048 | 10.1088/1475-7516/2024/05/048 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this study, we focus on a black hole immersed in a cosmological
Chaplygin-like dark fluid (CDF), characterized by the equation of state
$p=-B/\rho$ and an additional parameter $q$ influencing the energy density of
the fluid. We investigate the geodesic structure, shadow, and optical
appearance of such a black hole... | [
{
"created": "Wed, 31 Jan 2024 18:46:52 GMT",
"version": "v1"
},
{
"created": "Fri, 10 May 2024 15:43:10 GMT",
"version": "v2"
}
] | 2024-05-14 | [
[
"Li",
"Xiang-Qian",
""
],
[
"Yan",
"Hao-Peng",
""
],
[
"Yue",
"Xiao-Jun",
""
],
[
"Zhou",
"Shi-Wei",
""
],
[
"Xu",
"Qiang",
""
]
] | In this study, we focus on a black hole immersed in a cosmological Chaplygin-like dark fluid (CDF), characterized by the equation of state $p=-B/\rho$ and an additional parameter $q$ influencing the energy density of the fluid. We investigate the geodesic structure, shadow, and optical appearance of such a black hole. ... |
2111.09240 | Yuri Pavlov | Yu. V. Pavlov, O. B. Zaslavskii | Particle decay, Oberth effect and a relativistic rocket in the
Schwarzschild background | 29 pages, matches published version | Int. J. Mod. Phys. D 32 (2023) 2250143 | 10.1142/S0218271822501437 | null | gr-qc astro-ph.HE physics.space-ph | http://creativecommons.org/licenses/by/4.0/ | We relate the known Oberth effect and the nonrelativistic analogue of the
Penrose process. When a particle decays to two fragments, we derive the
conditions on the angles under which debris can come out for such a process to
occur. We also consider the decay and the Oberth effect in the relativistic
case, when a part... | [
{
"created": "Wed, 17 Nov 2021 17:06:50 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Mar 2023 10:27:30 GMT",
"version": "v2"
}
] | 2023-03-06 | [
[
"Pavlov",
"Yu. V.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | We relate the known Oberth effect and the nonrelativistic analogue of the Penrose process. When a particle decays to two fragments, we derive the conditions on the angles under which debris can come out for such a process to occur. We also consider the decay and the Oberth effect in the relativistic case, when a partic... |
1408.4591 | Andrea Geralico | Donato Bini, Christian Cherubini, Andrea Geralico, Robert T. Jantzen | Inertial effects in accelerating spacetimes | 15 pages, 5 figures; published version | IJMPD 16, 1813 (2007) | 10.1142/S0218271807011115 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of test particles along circular orbits in the vacuum $C$ metric
is studied in the Frenet-Serret formalism. Special orbits and corresponding
intrinsically defined geometrically relevant properties are selectively
studied.
| [
{
"created": "Wed, 20 Aug 2014 10:13:35 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bini",
"Donato",
""
],
[
"Cherubini",
"Christian",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | The motion of test particles along circular orbits in the vacuum $C$ metric is studied in the Frenet-Serret formalism. Special orbits and corresponding intrinsically defined geometrically relevant properties are selectively studied. |
0708.1810 | Raymond Burston | R B Burston | 1+1+2 Electromagnetic perturbations on non-vacuum LRS class II
space-times: Decoupling scalar and 2-vector harmonic amplitudes | 9 pages | Class.Quant.Grav.25:075002,2008 | 10.1088/0264-9381/25/7/075002 | null | gr-qc | null | We use the covariant and gauge-invariant 1+1+2 formalism of Clarkson and
Barrett \cite{Clarkson2003} to analyze electromagnetic (EM) perturbations on
non-vacuum {\it locally rotationally symmetric} (LRS) class II space-times.
Ultimately, we show how to derive six real decoupled equations governing the
total of six EM... | [
{
"created": "Tue, 14 Aug 2007 06:56:33 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Burston",
"R B",
""
]
] | We use the covariant and gauge-invariant 1+1+2 formalism of Clarkson and Barrett \cite{Clarkson2003} to analyze electromagnetic (EM) perturbations on non-vacuum {\it locally rotationally symmetric} (LRS) class II space-times. Ultimately, we show how to derive six real decoupled equations governing the total of six EM s... |
gr-qc/0403031 | John Steele | John D. Steele | Calculating Symmetries in Newman-Tamburino metrics | null | null | null | null | gr-qc | null | In this paper I show that the Newman-Tamburino spherical metrics always admit
a Killing vector, correcting a claim by Collinson and French, (1967 J. Math.
Phys. 8 701) and also admit a homothety. A similar calculation is given for the
limit of the Newman-Tamburino cylindrical metric.
| [
{
"created": "Sun, 7 Mar 2004 21:49:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Steele",
"John D.",
""
]
] | In this paper I show that the Newman-Tamburino spherical metrics always admit a Killing vector, correcting a claim by Collinson and French, (1967 J. Math. Phys. 8 701) and also admit a homothety. A similar calculation is given for the limit of the Newman-Tamburino cylindrical metric. |
gr-qc/0112061 | Petr Hajicek | P. Hajicek and I. Kouletsis (University of Berne) | Pair of null gravitating shells II. Canonical theory and embedding
variables | 20 pages, Latex file using amstex, some references corrected | Class.Quant.Grav. 19 (2002) 2551-2566 | 10.1088/0264-9381/19/10/303 | BUTP-01/25 | gr-qc | null | The study of the two shell system started in our first paper ``Pair of null
gravitating shells I'' (gr-qc/0112060) is continued. An action functional for a
single shell due to Louko, Whiting and Friedman is generalized to give
appropriate equations of motion for two and, in fact, any number of spherically
symmetric n... | [
{
"created": "Sat, 22 Dec 2001 10:52:40 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Dec 2001 14:05:51 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Hajicek",
"P.",
"",
"University of Berne"
],
[
"Kouletsis",
"I.",
"",
"University of Berne"
]
] | The study of the two shell system started in our first paper ``Pair of null gravitating shells I'' (gr-qc/0112060) is continued. An action functional for a single shell due to Louko, Whiting and Friedman is generalized to give appropriate equations of motion for two and, in fact, any number of spherically symmetric nul... |
1809.10037 | Dejan Gajic | Yannis Angelopoulos and Stefanos Aretakis and Dejan Gajic | Horizon hair of extremal black holes and measurements at null infinity | 6 pages, 2 figures | Phys. Rev. Lett. 121, 131102 (2018) | 10.1103/PhysRevLett.121.131102 | null | gr-qc hep-th math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the conserved charges on the event horizon and the Cauchy
horizon associated to scalar perturbations on extremal black holes are
externally measurable from null infinity. This suggests that these charges have
the potential to serve as an observational signature. The proof of this result
is based on o... | [
{
"created": "Wed, 26 Sep 2018 14:53:25 GMT",
"version": "v1"
}
] | 2018-09-28 | [
[
"Angelopoulos",
"Yannis",
""
],
[
"Aretakis",
"Stefanos",
""
],
[
"Gajic",
"Dejan",
""
]
] | It is shown that the conserved charges on the event horizon and the Cauchy horizon associated to scalar perturbations on extremal black holes are externally measurable from null infinity. This suggests that these charges have the potential to serve as an observational signature. The proof of this result is based on obt... |
1402.3256 | Hoda Farahani | M. Khurshudyan, J. Sadeghi, M. Hakobyan, H. Farahani and R. Myrzakulov | Interaction between modified Chaplygin gas and ghost dark energy in
presence of extra dimensions | null | Eur. Phys. J. Plus (2014) 129: 119 | 10.1140/epjp/i2014-14119-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider three different models of dark energy in higher
dimensional space-time and discuss about some cosmological parameters
numerically. The first model is a single component universe including viscous
varying modified Chaplygin gas. In the second model, we consider two-component
universe includi... | [
{
"created": "Thu, 13 Feb 2014 19:12:35 GMT",
"version": "v1"
}
] | 2014-06-13 | [
[
"Khurshudyan",
"M.",
""
],
[
"Sadeghi",
"J.",
""
],
[
"Hakobyan",
"M.",
""
],
[
"Farahani",
"H.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | In this paper, we consider three different models of dark energy in higher dimensional space-time and discuss about some cosmological parameters numerically. The first model is a single component universe including viscous varying modified Chaplygin gas. In the second model, we consider two-component universe including... |
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