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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1409.3066 | Mohammad Nouri-Zonoz | M. Nouri-Zonoz, J. Koohbor and H. Ramezani-Aval | Dark fluid or cosmological constant : Why there are different de
Sitter-type spacetimes | 16 pages, 1 figure, abridged to match the published version | Phys. Rev. D 91, 063010 (2015) | 10.1103/PhysRevD.91.063010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many different forms of the de Sitter metric in different coordinate systems
are used in the general relativity literature. Two of them are the most common,
the static form and the cosmological (exponentially expanding) form. The
staticity and non-stationarity of these two different forms are traced back to
the nonco... | [
{
"created": "Wed, 10 Sep 2014 13:43:31 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jan 2015 09:22:50 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Mar 2015 11:05:18 GMT",
"version": "v3"
}
] | 2015-04-01 | [
[
"Nouri-Zonoz",
"M.",
""
],
[
"Koohbor",
"J.",
""
],
[
"Ramezani-Aval",
"H.",
""
]
] | Many different forms of the de Sitter metric in different coordinate systems are used in the general relativity literature. Two of them are the most common, the static form and the cosmological (exponentially expanding) form. The staticity and non-stationarity of these two different forms are traced back to the noncomo... |
2107.04513 | Jing Theng Beh | Jing-Theng Beh, Tee-how Loo, and Avik De | Geodesic Deviation Equation In $f(Q)$-Gravity | null | null | 10.1016/j.cjph.2021.11.026 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present paper we study the Geodesic Deviation Equation (GDE) in the
modified $f(Q)$-gravity theories. The formulation of GDE in General Relativity
in the case of the homogeneous and isotropic
Friedman-Lema\^{i}tre-Robertson-Walker (FLRW) spacetime is briefly discussed
and then extended in modified $f(Q)$-gravi... | [
{
"created": "Fri, 9 Jul 2021 15:59:09 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jul 2021 14:01:44 GMT",
"version": "v2"
}
] | 2022-04-27 | [
[
"Beh",
"Jing-Theng",
""
],
[
"Loo",
"Tee-how",
""
],
[
"De",
"Avik",
""
]
] | In the present paper we study the Geodesic Deviation Equation (GDE) in the modified $f(Q)$-gravity theories. The formulation of GDE in General Relativity in the case of the homogeneous and isotropic Friedman-Lema\^{i}tre-Robertson-Walker (FLRW) spacetime is briefly discussed and then extended in modified $f(Q)$-gravity... |
gr-qc/0607085 | Martin Tajmar | M. Tajmar | A Note on the Local Cosmological Constant and the Dark Energy
Coincidence Problem | null | Class.Quant.Grav. 23 (2006) 5079-5083 | 10.1088/0264-9381/23/15/N01 | null | gr-qc | null | It has been suggested that the Dark Energy Coincidence Problem could be
interpreted as a possible link between the cosmological constant and a massive
graviton. We show that by using that link and models for the graviton mass a
dark energy density can be obtained that is indeed very close to measurements
by WMAP. As ... | [
{
"created": "Thu, 20 Jul 2006 22:34:44 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Tajmar",
"M.",
""
]
] | It has been suggested that the Dark Energy Coincidence Problem could be interpreted as a possible link between the cosmological constant and a massive graviton. We show that by using that link and models for the graviton mass a dark energy density can be obtained that is indeed very close to measurements by WMAP. As a ... |
gr-qc/0201019 | Vladimir Majernik | V. Majernik | Cosmology models with \Omega_M-dependent cosmological constant | 10 pages | Gen.Rel.Grav. 35 (2003) 1007-1016 | 10.1023/A:1024012816760 | null | gr-qc | null | We investigate the evolution of the scale factor in a cosmological model in
which the cosmological constant is given by the scalar arisen by the
contraction of the stress-energy tensor.
| [
{
"created": "Mon, 7 Jan 2002 11:37:08 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Majernik",
"V.",
""
]
] | We investigate the evolution of the scale factor in a cosmological model in which the cosmological constant is given by the scalar arisen by the contraction of the stress-energy tensor. |
0912.0722 | I-Ching Yang | I-Ching Yang | The Quasi-localized Einstein and M{\o}ller Energy Complex as
Thermodynamic Potentials | 12 pages | Chin.J.Phys.50:544,2012 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, I obtain the Einstein and M{\o}ller energy complex in PG
coordinates. According to the difference of energy within radius $r$ between
Einstein and M{\o}ller prescription, I could present the difference of energy
within radius $r$ like the fomula of Legendre transformation and propose that
the M{\o}ll... | [
{
"created": "Thu, 3 Dec 2009 20:13:28 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Dec 2009 05:19:17 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Sep 2010 06:47:08 GMT",
"version": "v3"
},
{
"created": "Sun, 30 Oct 2011 16:44:02 GMT",
"version": "v4"
}
] | 2012-09-19 | [
[
"Yang",
"I-Ching",
""
]
] | In this article, I obtain the Einstein and M{\o}ller energy complex in PG coordinates. According to the difference of energy within radius $r$ between Einstein and M{\o}ller prescription, I could present the difference of energy within radius $r$ like the fomula of Legendre transformation and propose that the M{\o}ller... |
gr-qc/0505156 | Geoffrey Lovelace | Hua Fang and Geoffrey Lovelace | Tidal coupling of a Schwarzschild black hole and circularly orbiting
moon | 14 pages, 0 figures, submitted to Phys. Rev. D | Phys.Rev. D72 (2005) 124016 | 10.1103/PhysRevD.72.124016 | null | gr-qc | null | We describe the possibility of using LISA's gravitational-wave observations
to study, with high precision, the response of a massive central body to the
tidal gravitational pull of an orbiting, compact, small-mass object. Motivated
by this application, we use first-order perturbation theory to study tidal
coupling fo... | [
{
"created": "Tue, 31 May 2005 18:58:16 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jun 2005 00:39:27 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Nov 2005 21:52:51 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Fang",
"Hua",
""
],
[
"Lovelace",
"Geoffrey",
""
]
] | We describe the possibility of using LISA's gravitational-wave observations to study, with high precision, the response of a massive central body to the tidal gravitational pull of an orbiting, compact, small-mass object. Motivated by this application, we use first-order perturbation theory to study tidal coupling for ... |
gr-qc/0310120 | Ola Wingbrant | Ola Wingbrant | Highly structured tensor identities for (2,2)-forms in four dimensions | LaTeX2e, 18 pages | null | null | null | gr-qc | null | In an n dimensional vector space, any tensor which is antisymmetric in k>n
arguments must vanish; this is a trivial consequence of the limited number of
dimensions. However, when other possible properties of tensors, for example
trace-freeness, are taken into account, such identities may be heavily
disguised. Tensor ... | [
{
"created": "Wed, 29 Oct 2003 11:38:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wingbrant",
"Ola",
""
]
] | In an n dimensional vector space, any tensor which is antisymmetric in k>n arguments must vanish; this is a trivial consequence of the limited number of dimensions. However, when other possible properties of tensors, for example trace-freeness, are taken into account, such identities may be heavily disguised. Tensor id... |
2102.05859 | William Campbell | Maxim Goryachev, William M. Campbell, Ik Siong Heng, Serge Galliou,
Eugene N. Ivanov and Michael E. Tobar | Rare Events Detected with a Bulk Acoustic Wave High Frequency
Gravitational Wave Antenna | 4 pages, 4 figures | Phys. Rev. Lett. 127, 071102 (2021) | 10.1103/PhysRevLett.127.071102 | null | gr-qc astro-ph.HE hep-ex physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work describes the operation of a High Frequency Gravitational Wave
detector based on a cryogenic Bulk Acoustic Wave (BAW) cavity and reports
observation of rare events during 153 days of operation over two seperate
experimental runs (Run 1 and Run 2). In both Run 1 and Run 2 two modes were
simultaneously monito... | [
{
"created": "Thu, 11 Feb 2021 06:28:09 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jul 2021 04:29:41 GMT",
"version": "v2"
}
] | 2021-08-18 | [
[
"Goryachev",
"Maxim",
""
],
[
"Campbell",
"William M.",
""
],
[
"Heng",
"Ik Siong",
""
],
[
"Galliou",
"Serge",
""
],
[
"Ivanov",
"Eugene N.",
""
],
[
"Tobar",
"Michael E.",
""
]
] | This work describes the operation of a High Frequency Gravitational Wave detector based on a cryogenic Bulk Acoustic Wave (BAW) cavity and reports observation of rare events during 153 days of operation over two seperate experimental runs (Run 1 and Run 2). In both Run 1 and Run 2 two modes were simultaneously monitore... |
1710.02681 | Alexander Kamenshchik | A.Yu. Kamenshchik, E.O. Pozdeeva, A.A. Starobinsky, A. Tronconi, G.
Venturi and S.Yu. Vernov | Induced gravity, and minimally and conformally coupled scalar fields in
Bianchi-I cosmological models | 11 pages, 3 figures, final version, to appear in Physical Review D | Phys. Rev. D 97, 023536 (2018) | 10.1103/PhysRevD.97.023536 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological evolution and singularity crossing in the Bianchi-I
universe filled with a conformally coupled scalar field and compare them with
those of the Bianchi-I universe filled with a minimally coupled scalar field.
We also write down the solution for the Bianchi-I Universe in the induced
gravity ... | [
{
"created": "Sat, 7 Oct 2017 12:54:28 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jan 2018 10:17:55 GMT",
"version": "v2"
}
] | 2018-02-07 | [
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Pozdeeva",
"E. O.",
""
],
[
"Starobinsky",
"A. A.",
""
],
[
"Tronconi",
"A.",
""
],
[
"Venturi",
"G.",
""
],
[
"Vernov",
"S. Yu.",
""
]
] | We study the cosmological evolution and singularity crossing in the Bianchi-I universe filled with a conformally coupled scalar field and compare them with those of the Bianchi-I universe filled with a minimally coupled scalar field. We also write down the solution for the Bianchi-I Universe in the induced gravity cosm... |
gr-qc/0603031 | Huguet Eric | E. Huguet, J. Queva, J. Renaud | Conformally related massless fields in dS, AdS and Minkowski spaces | 7 pages, 1 figure | Phys.Rev. D73 (2006) 084025 | 10.1103/PhysRevD.73.084025 | null | gr-qc | null | In this paper we write down the equation for a scalar conformally coupled
field simultaneously for de Sitter (dS), anti-de Sitter (AdS) and Minkowski
spacetime in d-dimensions. The curvature dependence appears in a very simple
way through a conformal factor. As a consequence the process of curvature free
limit, inclu... | [
{
"created": "Thu, 9 Mar 2006 17:28:44 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Huguet",
"E.",
""
],
[
"Queva",
"J.",
""
],
[
"Renaud",
"J.",
""
]
] | In this paper we write down the equation for a scalar conformally coupled field simultaneously for de Sitter (dS), anti-de Sitter (AdS) and Minkowski spacetime in d-dimensions. The curvature dependence appears in a very simple way through a conformal factor. As a consequence the process of curvature free limit, includi... |
1608.04275 | S. I. Kruglov | S.I. Kruglov | Asymptotic Reissner-Nordstr\"om solution within nonlinear
electrodynamics | 16 pages, 6 figures | Phys. Rev. D 94, 044026 (2016) | 10.1103/PhysRevD.94.044026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model of nonlinear electrodynamics coupled with the gravitational field is
studied. We obtain the asymptotic black hole solutions at $r\rightarrow 0$ and
$r\rightarrow \infty$. The asymptotic at $r\rightarrow 0$ is shown, and we find
corrections to the Reissner-Nordstr\"om solution and Coulomb's law at
$r\rightarro... | [
{
"created": "Mon, 15 Aug 2016 14:17:04 GMT",
"version": "v1"
}
] | 2016-08-16 | [
[
"Kruglov",
"S. I.",
""
]
] | A model of nonlinear electrodynamics coupled with the gravitational field is studied. We obtain the asymptotic black hole solutions at $r\rightarrow 0$ and $r\rightarrow \infty$. The asymptotic at $r\rightarrow 0$ is shown, and we find corrections to the Reissner-Nordstr\"om solution and Coulomb's law at $r\rightarrow\... |
1003.4660 | Jakub Mielczarek | Jakub Mielczarek, Thomas Cailleteau, Julien Grain, Aurelien Barrau | Inflation in loop quantum cosmology: Dynamics and spectrum of
gravitational waves | 11 pages, 14 figures. Matches version published in Phys. Rev. D | Phys.Rev.D81:104049,2010 | 10.1103/PhysRevD.81.104049 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop quantum cosmology provides an efficient framework to study the evolution
of the Universe beyond the classical Big Bang paradigm. Because of holonomy
corrections, the singularity is replaced by a "bounce". The dynamics of the
background is investigated into the details, as a function of the parameters of
the mode... | [
{
"created": "Wed, 24 Mar 2010 14:59:04 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jun 2010 11:40:45 GMT",
"version": "v2"
}
] | 2015-03-13 | [
[
"Mielczarek",
"Jakub",
""
],
[
"Cailleteau",
"Thomas",
""
],
[
"Grain",
"Julien",
""
],
[
"Barrau",
"Aurelien",
""
]
] | Loop quantum cosmology provides an efficient framework to study the evolution of the Universe beyond the classical Big Bang paradigm. Because of holonomy corrections, the singularity is replaced by a "bounce". The dynamics of the background is investigated into the details, as a function of the parameters of the model.... |
2008.09856 | Ivan de Martino | Ivan de Martino, Mariafelicia De Laurentis, Salvatore Capozziello | Tracing the cosmic history by Gauss-Bonnet gravity | 16 pages, 2 figures. Accepted for publication on Physical Review D | Phys. Rev. D 102, 063508, (2020) | 10.1103/PhysRevD.102.063508 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmic history can be traced considering further curvature contributions
inside the gravitational action. Assuming that standard General Relativity can
be extended by other curvature invariants, we discuss the possibility that an
action containing higher-order curvature terms can fit, in principle, the whole
universe... | [
{
"created": "Sat, 22 Aug 2020 15:29:18 GMT",
"version": "v1"
}
] | 2020-09-16 | [
[
"de Martino",
"Ivan",
""
],
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | Cosmic history can be traced considering further curvature contributions inside the gravitational action. Assuming that standard General Relativity can be extended by other curvature invariants, we discuss the possibility that an action containing higher-order curvature terms can fit, in principle, the whole universe e... |
2111.02007 | Wenshuai Liu | Wenshuai Liu | Detection of extremely low frequency gravitational wave using
gravitational lens | 5 pages, 1 figure. Published in Physical Review D | null | 10.1103/PhysRevD.103.103012 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effect of gravitational wave of cosmological wavelength on the
gravitational lensing is investigated. When the source, deflector, and observer
are aligned in a highly symmetric configuration, an Einstein ring will be
observed by the observer. There will be no time delays between different
locations on the Einstei... | [
{
"created": "Wed, 3 Nov 2021 03:57:31 GMT",
"version": "v1"
}
] | 2021-11-04 | [
[
"Liu",
"Wenshuai",
""
]
] | The effect of gravitational wave of cosmological wavelength on the gravitational lensing is investigated. When the source, deflector, and observer are aligned in a highly symmetric configuration, an Einstein ring will be observed by the observer. There will be no time delays between different locations on the Einstein ... |
2101.01403 | Antonio Vassallo | Antonio Vassallo | Does General Relativity Highlight Necessary Connections in Nature? | 29 pages, 2 figures, accepted for publication in Synthese | null | 10.1007/s11229-020-03009-z | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of general relativity is encoded in a set of ten differential
equations, the so-called Einstein field equations. It is usually believed that
Einstein's equations represent a physical law describing the coupling of
spacetime with material fields. However, just six of these equations actually
describe the ... | [
{
"created": "Tue, 5 Jan 2021 08:19:10 GMT",
"version": "v1"
}
] | 2021-01-06 | [
[
"Vassallo",
"Antonio",
""
]
] | The dynamics of general relativity is encoded in a set of ten differential equations, the so-called Einstein field equations. It is usually believed that Einstein's equations represent a physical law describing the coupling of spacetime with material fields. However, just six of these equations actually describe the co... |
2009.04865 | Nishanth Abu Gudapati | Nishanth Gudapati, Shing-Tung Yau | Quasi-Local Mass near the Singularity, the Event Horizon and the Null
Infinity of Black Hole Spacetimes | null | Adv. Theor. Math. Phys. Vol. 25, no. 1 (2021) | 10.4310/ATMP.2021.v25.n1.a3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The behaviour of geometric quantities close to geometric pathologies of a
spacetime is relevant to deduce the physical behaviour of the system. In this
work, we compute the quasi-local mass quantities - the Hawking mass, the
Brown-York mass and the Liu-Yau mass in the maximal extensions of the
spherically symmetric s... | [
{
"created": "Thu, 10 Sep 2020 13:59:12 GMT",
"version": "v1"
}
] | 2021-09-30 | [
[
"Gudapati",
"Nishanth",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | The behaviour of geometric quantities close to geometric pathologies of a spacetime is relevant to deduce the physical behaviour of the system. In this work, we compute the quasi-local mass quantities - the Hawking mass, the Brown-York mass and the Liu-Yau mass in the maximal extensions of the spherically symmetric sol... |
1502.00506 | Andrzej Krasi\'nski | Andrzej Krasi\'nski | Gamma ray bursts may be blueshifted bundles of the relic radiation | 5 pages, 3 figures. This paper is now obsolete. It is replaced by the
improved and widely expanded version, arxiv:1509.06316 | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A hypothesis is proposed that the gamma-ray bursts (GRBs) may arise by
blueshifting the emission radiation of hydrogen and helium generated during the
last scattering epoch. The blueshift mechanism is provided by such a Lema\^itre
-- Tolman (L--T) model, in which the bang-time function $t_B(r)$ is not
everywhere cons... | [
{
"created": "Mon, 2 Feb 2015 15:10:49 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Sep 2015 13:48:57 GMT",
"version": "v2"
}
] | 2015-09-23 | [
[
"Krasiński",
"Andrzej",
""
]
] | A hypothesis is proposed that the gamma-ray bursts (GRBs) may arise by blueshifting the emission radiation of hydrogen and helium generated during the last scattering epoch. The blueshift mechanism is provided by such a Lema\^itre -- Tolman (L--T) model, in which the bang-time function $t_B(r)$ is not everywhere consta... |
0811.1337 | Serguei Krasnikov | S. V. Krasnikov | Gravitational strings. Do we see one? | The published version. Minor corrections | Grav.Cosmol.15:62-64,2009 | 10.1134/S0202289309010150 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I present a class of objects called gravitational strings (GS) for their
similarity to the conventional cosmic strings: even though the former are just
singularities in flat spacetime, both varieties are equally "realistic", they
may play equally important cosmological r\^ole and their lensing properties are
akin. I ... | [
{
"created": "Sun, 9 Nov 2008 13:31:34 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Feb 2009 19:43:24 GMT",
"version": "v2"
}
] | 2009-03-19 | [
[
"Krasnikov",
"S. V.",
""
]
] | I present a class of objects called gravitational strings (GS) for their similarity to the conventional cosmic strings: even though the former are just singularities in flat spacetime, both varieties are equally "realistic", they may play equally important cosmological r\^ole and their lensing properties are akin. I ar... |
gr-qc/9609045 | Luis Bel | Ll. Bel (CNRS, France) | Static elastic deformations in general relativity | 15 pages, Latex | null | null | null | gr-qc | null | We present a new approach to the theory of static deformations of elastic
test bodies in general relativity based on a generalization of the concept of
frame of reference which we identify with the concept of quo-harmonic
congruence. We argue on the basis of this new approach that weak gravitational
plane waves do no... | [
{
"created": "Tue, 17 Sep 1996 13:17:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bel",
"Ll.",
"",
"CNRS, France"
]
] | We present a new approach to the theory of static deformations of elastic test bodies in general relativity based on a generalization of the concept of frame of reference which we identify with the concept of quo-harmonic congruence. We argue on the basis of this new approach that weak gravitational plane waves do not ... |
1907.12100 | Bert Janssen | Bert Janssen and Alejandro Jim\'enez-Cano | On the topological character of metric-affine Lovelock Lagrangians in
critical dimensions | 17 pages, no figures, 1 table. v2: Minor changes, references added
and typos corrected. Version to be published in Phys.Lett.B | Phys. Lett. B798 (2019) 134996 | 10.1016/j.physletb.2019.134996 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we prove that the $k$-th order metric-affine Lovelock
Lagrangian is not a total derivative in the critical dimension $n=2k$ in the
presence of non-trivial non-metricity. We use a bottom-up approach, starting
with the study of the simplest cases, Einstein-Palatini in two dimensions and
Gauss-Bonnet-Palat... | [
{
"created": "Sun, 28 Jul 2019 15:43:48 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Sep 2019 12:09:15 GMT",
"version": "v2"
}
] | 2019-10-22 | [
[
"Janssen",
"Bert",
""
],
[
"Jiménez-Cano",
"Alejandro",
""
]
] | In this paper we prove that the $k$-th order metric-affine Lovelock Lagrangian is not a total derivative in the critical dimension $n=2k$ in the presence of non-trivial non-metricity. We use a bottom-up approach, starting with the study of the simplest cases, Einstein-Palatini in two dimensions and Gauss-Bonnet-Palatin... |
1902.04315 | Anirban Chatterjee | Abhijit Bandyopadhyay and Anirban Chatterjee | Implications of JLA data for $k-$essence model of dark energy with given
equation of state | 21 pages, 4 figures, accepted for publication in European Physical
Journal Plus | Eur. Phys. J. Plus (2020) 135:181 | 10.1140/epjp/s13360-020-00161-w | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We investigated implications of recently released `Joint Light-curve
Analysis' (JLA) supernova Ia (SNe Ia) data for dark energy models with time
varying equation of state of dark energy, usually expressed as $w(z)$ in terms
of variation with corresponding redshift $z$. From a comprehensive analysis of
the JLA data, w... | [
{
"created": "Tue, 12 Feb 2019 10:14:01 GMT",
"version": "v1"
},
{
"created": "Tue, 7 May 2019 10:48:03 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Nov 2019 09:07:01 GMT",
"version": "v3"
}
] | 2020-02-06 | [
[
"Bandyopadhyay",
"Abhijit",
""
],
[
"Chatterjee",
"Anirban",
""
]
] | We investigated implications of recently released `Joint Light-curve Analysis' (JLA) supernova Ia (SNe Ia) data for dark energy models with time varying equation of state of dark energy, usually expressed as $w(z)$ in terms of variation with corresponding redshift $z$. From a comprehensive analysis of the JLA data, we ... |
gr-qc/0407066 | Di Sword | Donald Lynden-Bell | The Relativistically Spinning Charged Sphere | 15 pages, 1figure | Phys.Rev.D70:104021,2004 | 10.1103/PhysRevD.70.104021 | null | gr-qc | null | When the equatorial spin velocity, $v$, of a charged conducting sphere
approaches $c$, the Lorentz force causes a remarkable rearrangement of the
total charge $q$.
Charge of that sign is confined to a narrow equatorial belt at latitudes $b
\leqslant \sqrt{3} (1 - v^2/c^2)^{{1/2}}$ while charge of the opposite sign
... | [
{
"created": "Mon, 19 Jul 2004 14:22:29 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Lynden-Bell",
"Donald",
""
]
] | When the equatorial spin velocity, $v$, of a charged conducting sphere approaches $c$, the Lorentz force causes a remarkable rearrangement of the total charge $q$. Charge of that sign is confined to a narrow equatorial belt at latitudes $b \leqslant \sqrt{3} (1 - v^2/c^2)^{{1/2}}$ while charge of the opposite sign occu... |
1705.04259 | Alvin Chua | Alvin J. K. Chua, Christopher J. Moore, Jonathan R. Gair | The Fast and the Fiducial: Augmented kludge waveforms for detecting
extreme-mass-ratio inspirals | Published version | Phys. Rev. D 96, 044005 (2017) | 10.1103/PhysRevD.96.044005 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The extreme-mass-ratio inspirals (EMRIs) of stellar-mass compact objects into
massive black holes are an important class of source for the future space-based
gravitational-wave detector LISA. Detecting signals from EMRIs will require
waveform models that are both accurate and computationally efficient. In this
paper,... | [
{
"created": "Thu, 11 May 2017 16:16:11 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Aug 2017 06:55:19 GMT",
"version": "v2"
}
] | 2017-08-11 | [
[
"Chua",
"Alvin J. K.",
""
],
[
"Moore",
"Christopher J.",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | The extreme-mass-ratio inspirals (EMRIs) of stellar-mass compact objects into massive black holes are an important class of source for the future space-based gravitational-wave detector LISA. Detecting signals from EMRIs will require waveform models that are both accurate and computationally efficient. In this paper, w... |
1505.05728 | Daniela Kunst | Daniela Kunst, Volker Perlick and Claus L\"ammerzahl | Isofrequency pairing of spinning particles in Schwarzschild-de Sitter
spacetime | 13 pages, 8 figures | Phys. Rev. D 92, 024029 (2015) | 10.1103/PhysRevD.92.024029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been established in Schwarzschild spacetime (and more generally in
Kerr spacetime) that pairs of geometrically different timelike geodesics with
the same radial and azimuthal frequencies exist in the strong field regime. The
occurrence of this socalled isofrequency pairing is of relevance in view of
gravitatio... | [
{
"created": "Thu, 21 May 2015 13:29:23 GMT",
"version": "v1"
}
] | 2015-07-22 | [
[
"Kunst",
"Daniela",
""
],
[
"Perlick",
"Volker",
""
],
[
"Lämmerzahl",
"Claus",
""
]
] | It has been established in Schwarzschild spacetime (and more generally in Kerr spacetime) that pairs of geometrically different timelike geodesics with the same radial and azimuthal frequencies exist in the strong field regime. The occurrence of this socalled isofrequency pairing is of relevance in view of gravitationa... |
1912.00470 | Valery Zhdanov | V.I. Zhdanov and O.S. Stashko | Static spherically symmetric configurations with N non-linear scalar
fields: global and asymptotic properties | 11 pages; 6 figures; accepted in PRD | Phys. Rev. D 101, 064064 (2020) | 10.1103/PhysRevD.101.064064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In case of a spherically symmetric non-linear scalar field (SF) in flat
space, besides singularity at the center, spherical singularities can occur for
non-zero values of radial variable $r>0$. We show that in the General
Relativity the gravitational field suppresses the occurrence of the spherical
singularities unde... | [
{
"created": "Sun, 1 Dec 2019 18:33:48 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Dec 2019 08:45:24 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Mar 2020 07:17:19 GMT",
"version": "v3"
}
] | 2020-04-01 | [
[
"Zhdanov",
"V. I.",
""
],
[
"Stashko",
"O. S.",
""
]
] | In case of a spherically symmetric non-linear scalar field (SF) in flat space, besides singularity at the center, spherical singularities can occur for non-zero values of radial variable $r>0$. We show that in the General Relativity the gravitational field suppresses the occurrence of the spherical singularities under ... |
gr-qc/9809055 | Kjell Rosquist | Kjell Rosquist | Exact relativistic stellar models with liquid surface. I. Generalizing
Buchdahl's $n=1$ polytrope | 19 pages, 12 figures (16 eps files), LaTeX2e with the standard
packages amssymb, amsmath, graphicx, subfigure, psfrag | Class.Quant.Grav. 16 (1999) 1755-1771 | 10.1088/0264-9381/16/6/310 | SUITP 98-20 | gr-qc astro-ph | null | A family of exact relativistic stellar models is described. The family
generalizes Buchdahl's n=1 polytropic solution. The matter content is a perfect
fluid and, excluding Buchdahl's original model, it behaves as a liquid at low
pressures in the sense that the energy density is non-zero in the zero pressure
limit. Th... | [
{
"created": "Thu, 17 Sep 1998 17:47:16 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Rosquist",
"Kjell",
""
]
] | A family of exact relativistic stellar models is described. The family generalizes Buchdahl's n=1 polytropic solution. The matter content is a perfect fluid and, excluding Buchdahl's original model, it behaves as a liquid at low pressures in the sense that the energy density is non-zero in the zero pressure limit. The ... |
2202.12841 | Jan Harms | Jan Harms, Luca Naticchioni, Enrico Calloni, Rosario De Rosa, Fulvio
Ricci, Domenico D'Urso | A lower limit for Newtonian-noise models of the Einstein Telescope | 16 pages, 4 figures, 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein Telescope (ET) is a proposed third-generation gravitational-wave
(GW) underground observatory. It will have greatly increased sensitivity
compared to current GW detectors, and it is designed to extend the observation
band down to a few Hz. At these frequencies, a major limitation of the ET
sensitivity is... | [
{
"created": "Fri, 25 Feb 2022 17:33:48 GMT",
"version": "v1"
}
] | 2022-02-28 | [
[
"Harms",
"Jan",
""
],
[
"Naticchioni",
"Luca",
""
],
[
"Calloni",
"Enrico",
""
],
[
"De Rosa",
"Rosario",
""
],
[
"Ricci",
"Fulvio",
""
],
[
"D'Urso",
"Domenico",
""
]
] | The Einstein Telescope (ET) is a proposed third-generation gravitational-wave (GW) underground observatory. It will have greatly increased sensitivity compared to current GW detectors, and it is designed to extend the observation band down to a few Hz. At these frequencies, a major limitation of the ET sensitivity is p... |
2105.02815 | Orest Hrycyna | Orest Hrycyna | A new generic and structurally stable cosmological model without
singularity | 11 pages; 2 multiple figures; (v2) published version | Physics Letters B 820 (2021) 136511 | 10.1016/j.physletb.2021.136511 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical systems methods are used to investigate a cosmological model with
non-minimally coupled scalar field and asymptotically quadratic potential
function. We found that for values of the non-minimal coupling constant
parameter $\frac{3}{16}<\xi<\frac{1}{4}$ there exists an unstable asymptotic de
Sitter state, fr... | [
{
"created": "Thu, 6 May 2021 17:00:28 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jul 2021 09:28:20 GMT",
"version": "v2"
}
] | 2021-07-15 | [
[
"Hrycyna",
"Orest",
""
]
] | Dynamical systems methods are used to investigate a cosmological model with non-minimally coupled scalar field and asymptotically quadratic potential function. We found that for values of the non-minimal coupling constant parameter $\frac{3}{16}<\xi<\frac{1}{4}$ there exists an unstable asymptotic de Sitter state, free... |
1307.3340 | Gustavo Dotti | Gustavo Dotti | Non-modal linear stability of the Schwarzschild black hole | Inclusion of \ell=0,1 modes. Changes in the treatment of even
perturbations | Phys. Rev. Lett. 112, 191101 (2014) | 10.1103/PhysRevLett.112.191101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A proof is given that the space $\L$ of solutions of the linearized vacuum
Einstein's equation around a Schwarzschild black hole is parameterized by two
scalar fields which are gauge invariant combinations of perturbed algebraic and
differential invariants of the Weyl tensor, and encode the information on the
odd (-)... | [
{
"created": "Fri, 12 Jul 2013 06:29:07 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Oct 2013 19:52:48 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Jun 2014 17:57:56 GMT",
"version": "v3"
}
] | 2014-06-12 | [
[
"Dotti",
"Gustavo",
""
]
] | A proof is given that the space $\L$ of solutions of the linearized vacuum Einstein's equation around a Schwarzschild black hole is parameterized by two scalar fields which are gauge invariant combinations of perturbed algebraic and differential invariants of the Weyl tensor, and encode the information on the odd (-) a... |
2304.06829 | Subhodeep Sarkar | Subhodeep Sarkar, Mostafizur Rahman, Sumanta Chakraborty | Perturbing the perturbed: Stability of quasinormal modes in presence of
a positive cosmological constant | v2: 48 pages, 13 figures, minor modifications, accepted for
publication in Phys. Rev. D | Phys. Rev. D 108, 104002 (2023) | 10.1103/PhysRevD.108.104002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we wish to address the question -- whether the quasi-normal
modes, the characteristic frequencies associated with perturbed black hole
spacetimes, central to the stability of these black holes, are themselves
stable. Though the differential operator governing the perturbation of black
hole spacetimes is... | [
{
"created": "Thu, 13 Apr 2023 21:38:50 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Nov 2023 20:12:12 GMT",
"version": "v2"
}
] | 2023-11-07 | [
[
"Sarkar",
"Subhodeep",
""
],
[
"Rahman",
"Mostafizur",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | In this work, we wish to address the question -- whether the quasi-normal modes, the characteristic frequencies associated with perturbed black hole spacetimes, central to the stability of these black holes, are themselves stable. Though the differential operator governing the perturbation of black hole spacetimes is s... |
2208.06564 | Umananda Dev Goswami | Nashiba Parbin and Umananda Dev Goswami | Galactic rotation dynamics in a new $f(\mathcal{R})$ gravity model | 14 pages, 6 figures. The title has been changed in this version | Eur. Phys. J. C 83, 411 (2023) | 10.1140/epjc/s10052-023-11568-x | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We propose to test the viability of the recently introduced $f(\mathcal{R})$
gravity model in the galactic scales. For this purpose we consider test
particles moving in stable circular orbits around the galactic center. We study
the Palatini approach of $f(\mathcal{R})$ gravity via Weyl transformation,
which is the f... | [
{
"created": "Sat, 13 Aug 2022 03:54:44 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Nov 2022 06:48:32 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Parbin",
"Nashiba",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We propose to test the viability of the recently introduced $f(\mathcal{R})$ gravity model in the galactic scales. For this purpose we consider test particles moving in stable circular orbits around the galactic center. We study the Palatini approach of $f(\mathcal{R})$ gravity via Weyl transformation, which is the fra... |
1801.04592 | Tsvetan Vetsov Dr. | Tsvetan Vetsov, Galin Gyulchev, Stoytcho Yazadjiev | Shadows of Black Holes in Vector-Tensor Galileons Modified Gravity | 18 pages, 25 figures, 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the shadows of disformal black holes in vector-tensor Galileons
modified gravity. Our analysis shows that the apparent image of the black hole
in the observer's sky is non-spherical and cuspy, which is in contrast to the
Kerr and Kerr-Newman cases. The non-trivial silhouette of the apparent image of
the blac... | [
{
"created": "Sun, 14 Jan 2018 18:00:45 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jan 2018 11:53:02 GMT",
"version": "v2"
}
] | 2018-01-25 | [
[
"Vetsov",
"Tsvetan",
""
],
[
"Gyulchev",
"Galin",
""
],
[
"Yazadjiev",
"Stoytcho",
""
]
] | We study the shadows of disformal black holes in vector-tensor Galileons modified gravity. Our analysis shows that the apparent image of the black hole in the observer's sky is non-spherical and cuspy, which is in contrast to the Kerr and Kerr-Newman cases. The non-trivial silhouette of the apparent image of the black ... |
1409.3310 | Takeshi Chiba | Ryo Shiose, Masashi Kimura, Takeshi Chiba | Motion of Charged Particles around a Weakly Magnetized Rotating Black
Hole | 12 pages, 6 figures, typos corrected, to appear in Phys.Rev.D | Phys.Rev. D90 (2014) 12, 124016 | 10.1103/PhysRevD.90.124016 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of a charged particle around a weakly magnetized rotating
black hole. We classify the fate of a charged particle kicked out from the
innermost stable circular orbit. We find that the final fate of the charged
particle depends mostly on the energy of the particle and the radius of the
orbit. The en... | [
{
"created": "Thu, 11 Sep 2014 03:30:21 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Sep 2014 02:23:41 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Nov 2014 00:53:17 GMT",
"version": "v3"
}
] | 2015-09-03 | [
[
"Shiose",
"Ryo",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Chiba",
"Takeshi",
""
]
] | We study the motion of a charged particle around a weakly magnetized rotating black hole. We classify the fate of a charged particle kicked out from the innermost stable circular orbit. We find that the final fate of the charged particle depends mostly on the energy of the particle and the radius of the orbit. The ener... |
1409.7455 | Jonathan Ziprick | Jonathan Ziprick | Point particles in 2+1 dimensions: general relativity and loop gravity
descriptions | 31 pages, 14 figures | null | 10.1088/0264-9381/32/4/045005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a Hamiltonian description of point particles in (2+1)-dimensions
using connection and frame-field variables for general relativity. The topology
of each spatial hypersurface is that of a punctured two-sphere with particles
residing at the punctures. We describe this topology with a CW complex (a
collection... | [
{
"created": "Fri, 26 Sep 2014 01:21:11 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Ziprick",
"Jonathan",
""
]
] | We develop a Hamiltonian description of point particles in (2+1)-dimensions using connection and frame-field variables for general relativity. The topology of each spatial hypersurface is that of a punctured two-sphere with particles residing at the punctures. We describe this topology with a CW complex (a collection o... |
gr-qc/0311080 | Tekin Dereli | H. Cebeci (METU, Ankara, Turkey), T. Dereli (Koc Univ., Istanbul,
Turkey), R. W. Tucker (Lancaster Univ., UK) | Autoparallel orbits in Kerr Brans-Dicke spacetimes | 14 pages. LATEX file. To appear in Int. J. Mod. Phys. D | Int.J.Mod.Phys. D13 (2004) 137-148 | 10.1142/S0218271804004487 | null | gr-qc | null | The bounded orbital motion of a massive spinless test particle in the
background of a Kerr Brans-Dicke geometry is analysed in terms of worldlines
that are auto-parallels of different metric compatible spacetime connections.
In one case the connection is that of Levi-Civita with zero-torsion. In the
second case the c... | [
{
"created": "Mon, 24 Nov 2003 14:37:20 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Cebeci",
"H.",
"",
"METU, Ankara, Turkey"
],
[
"Dereli",
"T.",
"",
"Koc Univ., Istanbul,\n Turkey"
],
[
"Tucker",
"R. W.",
"",
"Lancaster Univ., UK"
]
] | The bounded orbital motion of a massive spinless test particle in the background of a Kerr Brans-Dicke geometry is analysed in terms of worldlines that are auto-parallels of different metric compatible spacetime connections. In one case the connection is that of Levi-Civita with zero-torsion. In the second case the con... |
0704.2284 | Ali Kaya | Erol Ertan, Ali Kaya | Boundary Effects in Local Inflation and Spectrum of Density
Perturbations | 11 pages, 8 figures, revtex4, v4: minor typos corrected, twocolumn
version | Gen.Rel.Grav.40:1511,2008 | 10.1007/s10714-007-0544-x | null | gr-qc astro-ph hep-th | null | We observe that when a local patch in a radiation filled Robertson-Walker
universe inflates by some reason, outside perturbations can enter into the
inflating region. Generally, the physical wavelengths of these perturbations
become larger than the Hubble radius as they cross into the inflating space and
their amplit... | [
{
"created": "Wed, 18 Apr 2007 08:27:01 GMT",
"version": "v1"
},
{
"created": "Mon, 28 May 2007 15:22:17 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Nov 2007 18:04:59 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Nov 2007 13:04:39 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Ertan",
"Erol",
""
],
[
"Kaya",
"Ali",
""
]
] | We observe that when a local patch in a radiation filled Robertson-Walker universe inflates by some reason, outside perturbations can enter into the inflating region. Generally, the physical wavelengths of these perturbations become larger than the Hubble radius as they cross into the inflating space and their amplitud... |
1501.06762 | Eduardo Guendelman I | Eduardo I. Guendelman, Arka Prabha Banik, Gilad Granit, Tomer Ygael,
Christian Rohrhofer | Schwarzschild and Friedmann Lema\^itre Robertson Walker metrics from
Newtonian Gravitational collapse | 16 pages, a number of references added, discussion expanded | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As it is well known, the $0-0$ component of the Schwarzschild space can be
obtained by the requirement that the geodesic of slowly moving particles match
the Newtonian equation. Given this result, we show here that the remaining
components can be obtained by requiring that the inside of a Newtonian ball of
dust match... | [
{
"created": "Tue, 27 Jan 2015 12:58:19 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jan 2015 13:34:18 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Feb 2015 13:10:06 GMT",
"version": "v3"
},
{
"created": "Mon, 12 Oct 2015 06:49:06 GMT",
"version": "v4"
}
] | 2015-10-13 | [
[
"Guendelman",
"Eduardo I.",
""
],
[
"Banik",
"Arka Prabha",
""
],
[
"Granit",
"Gilad",
""
],
[
"Ygael",
"Tomer",
""
],
[
"Rohrhofer",
"Christian",
""
]
] | As it is well known, the $0-0$ component of the Schwarzschild space can be obtained by the requirement that the geodesic of slowly moving particles match the Newtonian equation. Given this result, we show here that the remaining components can be obtained by requiring that the inside of a Newtonian ball of dust matched... |
2108.07655 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu, Robert B. Mann | Characteristic interaction potential of black hole molecules from the
microscopic interpretation of Ruppeiner geometry | 5 pages and 3 figures. Typos are corrected | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Ruppeiner geometry has been found to be a novel promising approach to uncover
the microstructure of fluid systems and black holes. In this work, combining
with the micro model of the Van der Waals fluid, we shall propose a first
microscopic interpretation for the empirical observation of Ruppeiner geometry.
Then empl... | [
{
"created": "Tue, 17 Aug 2021 14:38:35 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Aug 2021 06:05:45 GMT",
"version": "v2"
}
] | 2021-08-26 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
],
[
"Mann",
"Robert B.",
""
]
] | Ruppeiner geometry has been found to be a novel promising approach to uncover the microstructure of fluid systems and black holes. In this work, combining with the micro model of the Van der Waals fluid, we shall propose a first microscopic interpretation for the empirical observation of Ruppeiner geometry. Then employ... |
0902.0205 | Naresh Dadhich | Naresh Dadhich | Why do we live in four dimension? | 14 pages, First V V Narlikar Memorial Lecture delivered on 23
January, 2009 at Jamia Millia Islamia, Ne Delhi | null | null | null | gr-qc hep-th physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perceive the dimension of physical spacetime we live in through physical
experiments and hence it is pertinent to probe the dimension in which the
fundamental physical forces exist and act? In this context we shall investigate
the two classical fields of gravitation and electromagnetism and argue that
four dimensi... | [
{
"created": "Mon, 2 Feb 2009 06:01:41 GMT",
"version": "v1"
}
] | 2009-02-24 | [
[
"Dadhich",
"Naresh",
""
]
] | We perceive the dimension of physical spacetime we live in through physical experiments and hence it is pertinent to probe the dimension in which the fundamental physical forces exist and act? In this context we shall investigate the two classical fields of gravitation and electromagnetism and argue that four dimension... |
1605.00512 | Charles D. Lane | Charles D. Lane | Spacetime Variation of Lorentz-Violation Coefficients at Nonrelativistic
Scale | 8 pages; v2 has a paragraph added to subsection II.B.1 | Phys. Rev. D 94, 025016 (2016) | 10.1103/PhysRevD.94.025016 | Berry College HEP-004 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notion of uniform and/or constant tensor fields of rank $>0$ is
incompatible with general curved spacetimes. This work considers the
consequences of certain tensor-valued coefficients for Lorentz violation in the
Standard-Model Extension varying with spacetime position. We focus on two of
the coefficients, $a_\mu... | [
{
"created": "Mon, 2 May 2016 14:51:47 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jul 2016 15:42:56 GMT",
"version": "v2"
}
] | 2016-07-15 | [
[
"Lane",
"Charles D.",
""
]
] | The notion of uniform and/or constant tensor fields of rank $>0$ is incompatible with general curved spacetimes. This work considers the consequences of certain tensor-valued coefficients for Lorentz violation in the Standard-Model Extension varying with spacetime position. We focus on two of the coefficients, $a_\mu$ ... |
2108.01820 | Jing Ren | Jing Ren, Di Wu | Gravitational wave echoes search with combs | 25 pages, 10 figures, 2 tables; v2: matches version to be published
in PRD, new plots in Figs.5 and 6 added to show the robustness of the
algorithm in detecting echo signals of different shapes, bottom right panel
in Fig.7 updated after correcting a typo (other results unchanged), appendix
expanded for more on ... | null | 10.1103/PhysRevD.104.124023 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave echoes may provide a smoking gun signal for new physics in
the immediate vicinity of black holes. As a quasiperiodic signal in time,
echoes are characterized by the nearly constant time delay, and its precise
measurement can help reveal a Planck-scale deviation outside of the would-be
horizon. Diff... | [
{
"created": "Wed, 4 Aug 2021 02:45:35 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Nov 2021 05:22:14 GMT",
"version": "v2"
}
] | 2021-12-15 | [
[
"Ren",
"Jing",
""
],
[
"Wu",
"Di",
""
]
] | Gravitational wave echoes may provide a smoking gun signal for new physics in the immediate vicinity of black holes. As a quasiperiodic signal in time, echoes are characterized by the nearly constant time delay, and its precise measurement can help reveal a Planck-scale deviation outside of the would-be horizon. Differ... |
1204.1122 | Kiyoshi Shiraishi | Takuya Maki (Women's Phys. Ed. Coll., Tokyo), Yuji Naramoto and
Kiyoshi Shiraishi (Yamaguchi U.) | On the cosmology of Weyl's gauge invariant gravity | 7 pages, no figure | Acta Phys. Polon. B41 (2010) 1195-1201 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently the vector inflation has been proposed as the alternative to
inflationary models based on scalar bosons and quintessence scalar fields. In
the vector inflationary model, the vector field non-minimally couples to
gravity. We should, however, inquire if there exists a relevant fundamental
theory which supports... | [
{
"created": "Thu, 5 Apr 2012 05:16:48 GMT",
"version": "v1"
}
] | 2012-04-06 | [
[
"Maki",
"Takuya",
"",
"Women's Phys. Ed. Coll., Tokyo"
],
[
"Naramoto",
"Yuji",
"",
"Yamaguchi U."
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi U."
]
] | Recently the vector inflation has been proposed as the alternative to inflationary models based on scalar bosons and quintessence scalar fields. In the vector inflationary model, the vector field non-minimally couples to gravity. We should, however, inquire if there exists a relevant fundamental theory which supports t... |
1012.1920 | Haret C. Rosu | Haret C. Rosu and Kira V. Khmelnytskaya | Shifted Riccati Procedure: Application to Conformal Barotropic FRW
Cosmologies | null | SIGMA 7 (2011), 013, 9 pages | 10.3842/SIGMA.2011.013 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-sa/3.0/ | In the case of barotropic FRW cosmologies, the Hubble parameter in conformal
time is the solution of a simple Riccati equation of constant coefficients. We
consider these cosmologies in the framework of nonrelativistic supersymmetry
that has been effective in the area of supersymmetric quantum mechanics.
Recalling th... | [
{
"created": "Thu, 9 Dec 2010 04:28:09 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Feb 2011 05:54:23 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Rosu",
"Haret C.",
""
],
[
"Khmelnytskaya",
"Kira V.",
""
]
] | In the case of barotropic FRW cosmologies, the Hubble parameter in conformal time is the solution of a simple Riccati equation of constant coefficients. We consider these cosmologies in the framework of nonrelativistic supersymmetry that has been effective in the area of supersymmetric quantum mechanics. Recalling that... |
0907.1189 | Aharon Davidson | Aharon Davidson, Shimon Rubin | Brane Gravitational Extension of Dirac's "Extensible Model of the
Electron" | 6 PRD pages, 4 figures; References added | Class.Quant.Grav.26:235006,2009 | 10.1088/0264-9381/26/23/235006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gravitational extension of Dirac's "Extensible model of the electron" is
presented. The Dirac bubble, treated as a 3-dim electrically charged brane, is
dynamically embedded within a 4-dim $Z_{2}$-symmetric Reissner-Nordstrom bulk.
Crucial to our analysis is the gravitational extension of Dirac's brane
variation pre... | [
{
"created": "Tue, 7 Jul 2009 10:42:34 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Oct 2009 12:01:59 GMT",
"version": "v2"
}
] | 2009-11-16 | [
[
"Davidson",
"Aharon",
""
],
[
"Rubin",
"Shimon",
""
]
] | A gravitational extension of Dirac's "Extensible model of the electron" is presented. The Dirac bubble, treated as a 3-dim electrically charged brane, is dynamically embedded within a 4-dim $Z_{2}$-symmetric Reissner-Nordstrom bulk. Crucial to our analysis is the gravitational extension of Dirac's brane variation presc... |
gr-qc/9604037 | Patricio Anibal Letelier | Werner M. Vieira and Patricio S. Letelier | Chaos around a H\'enon-Heiles-inspired exact perturbation of a black
hole | 7 pages Revtex | Phys.Rev.Lett. 76 (1996) 1409-1412; Erratum-ibid. 76 (1996) 4098 | 10.1103/PhysRevLett.76.1409 | null | gr-qc chao-dyn nlin.CD | null | A solution of the Einstein's equations that represents the superposition of a
Schwarszchild black hole with both quadrupolar and octopolar terms describing a
halo is exhibited. We show that this solution, in the Newtonian limit, is an
analog to the well known H\'enon-Heiles potential. The integrability of orbits
of t... | [
{
"created": "Thu, 18 Apr 1996 02:49:28 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Vieira",
"Werner M.",
""
],
[
"Letelier",
"Patricio S.",
""
]
] | A solution of the Einstein's equations that represents the superposition of a Schwarszchild black hole with both quadrupolar and octopolar terms describing a halo is exhibited. We show that this solution, in the Newtonian limit, is an analog to the well known H\'enon-Heiles potential. The integrability of orbits of tes... |
2302.09141 | Ernesto Contreras | Roberto Avalos, Ernesto Contreras | Quasi normal modes of a Casimir--like traversable wormhole through the
semi-analytical WKB approach | null | Annals of Physics, 446, 169128 (2022) | 10.1016/j.aop.2022.169128 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we implement the semi-analytical WKB method to explore the
behaviour of a scalar field on a traversable wormhole space--time with a
Casimir--like complexity reported in Eur. Phys. J. C 82, 420 (2022). We
estimate the error in the computation of the quasi--normal frequencies of the
scalar field at each o... | [
{
"created": "Fri, 17 Feb 2023 21:09:48 GMT",
"version": "v1"
}
] | 2023-02-21 | [
[
"Avalos",
"Roberto",
""
],
[
"Contreras",
"Ernesto",
""
]
] | In this work, we implement the semi-analytical WKB method to explore the behaviour of a scalar field on a traversable wormhole space--time with a Casimir--like complexity reported in Eur. Phys. J. C 82, 420 (2022). We estimate the error in the computation of the quasi--normal frequencies of the scalar field at each ord... |
0809.3523 | Edward Anderson | E. Anderson | Triangleland. II. Quantum Mechanics of Pure Shape | Journal Reference added, minor updates to References and Figures | Class.Quant.Grav.26:135021,2009 | 10.1088/0264-9381/26/13/135021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Relational particle models are of value in the absolute versus relative
motion debate. They are also analogous to the dynamical formulation of general
relativity, and as such are useful for investigating conceptual strategies
proposed for resolving the problem of time in quantum general relativity.
Moreover, to date ... | [
{
"created": "Sat, 20 Sep 2008 19:23:06 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Apr 2009 18:12:28 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Sep 2009 00:05:02 GMT",
"version": "v3"
}
] | 2009-09-24 | [
[
"Anderson",
"E.",
""
]
] | Relational particle models are of value in the absolute versus relative motion debate. They are also analogous to the dynamical formulation of general relativity, and as such are useful for investigating conceptual strategies proposed for resolving the problem of time in quantum general relativity. Moreover, to date th... |
gr-qc/9608056 | Sandro Silva E. Costa | Sandro S. Costa (IFT) | Schwarzschild solution and Mach's principle | 10 pages, standard LaTeX article | null | null | null | gr-qc | null | The purpose of this work is to show a possible reconciliation between Mach's
principle and the Schwarzschild solution, using a description of this solution
in terms of a new radial cooordinate related to the behaviour of Unruh
detectors.
| [
{
"created": "Sat, 24 Aug 1996 20:47:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Costa",
"Sandro S.",
"",
"IFT"
]
] | The purpose of this work is to show a possible reconciliation between Mach's principle and the Schwarzschild solution, using a description of this solution in terms of a new radial cooordinate related to the behaviour of Unruh detectors. |
gr-qc/0701071 | Daniel Sudarsky | Daniel Sudarsky | A signature of quantum gravity at the source of the seeds of cosmic
structure? | LateX, (jpconference macros), Prepared for the proceedings the Third
International Workshop DICE 2006, " Quantum Mechanics between decoherence and
Determinism) | J.Phys.Conf.Ser.67:012054,2007 | 10.1088/1742-6596/67/1/012054 | null | gr-qc | null | This article reviews a recent work by a couple of colleagues and myself about
the shortcomings of the standard explanations of the quantum origin of cosmic
structure in the inflationary scenario, and a proposal to address them. The
point it that in the usual accounts the inhomogeneity and anisotropy of our
universe s... | [
{
"created": "Sat, 13 Jan 2007 00:28:21 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sudarsky",
"Daniel",
""
]
] | This article reviews a recent work by a couple of colleagues and myself about the shortcomings of the standard explanations of the quantum origin of cosmic structure in the inflationary scenario, and a proposal to address them. The point it that in the usual accounts the inhomogeneity and anisotropy of our universe see... |
gr-qc/0312049 | Vilson T. Zanchin | V. T. Zanchin, A. S. Miranda | Spherical and planar three-dimensional anti-de Sitter black holes | 27 pages, uses "iopclass" files (Latex2e) | Class.Quant.Grav.21:875-898,2004 | 10.1088/0264-9381/21/4/009 | null | gr-qc hep-th | null | The technique of dimensional reduction was used in a recent paper (Zanchin et
al, Phys. Rev. D66, 064022,(2002)) where a three-dimensional (3D)
Einstein-Maxwell-Dilaton theory was built from the usual four-dimensional (4D)
Einstein-Maxwell-Hilbert action for general relativity. Starting from a class
of 4D toroidal bl... | [
{
"created": "Mon, 8 Dec 2003 23:20:12 GMT",
"version": "v1"
}
] | 2016-03-31 | [
[
"Zanchin",
"V. T.",
""
],
[
"Miranda",
"A. S.",
""
]
] | The technique of dimensional reduction was used in a recent paper (Zanchin et al, Phys. Rev. D66, 064022,(2002)) where a three-dimensional (3D) Einstein-Maxwell-Dilaton theory was built from the usual four-dimensional (4D) Einstein-Maxwell-Hilbert action for general relativity. Starting from a class of 4D toroidal blac... |
2103.14912 | Ali Vahedi | Ali Vahedi, Jafar Khodagholizadeh, Arman Tursunov | Aschenbach effect for spinning particles in Kerr-(A)dS spacetime | Comments are welcome. Accepted for EPJC | null | 10.1140/epjc/s10052-021-09081-0 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | A non-monotonic behavior of the velocity gradient of a test particle
revolving around a rapidly rotating black hole in the locally non-rotating
frame of reference is known as the Aschenbach effect. This effect can serve as
a distinguishing signature of rapidly rotating black holes, being potentially
useful for the me... | [
{
"created": "Sat, 27 Mar 2021 13:44:19 GMT",
"version": "v1"
}
] | 2021-04-21 | [
[
"Vahedi",
"Ali",
""
],
[
"Khodagholizadeh",
"Jafar",
""
],
[
"Tursunov",
"Arman",
""
]
] | A non-monotonic behavior of the velocity gradient of a test particle revolving around a rapidly rotating black hole in the locally non-rotating frame of reference is known as the Aschenbach effect. This effect can serve as a distinguishing signature of rapidly rotating black holes, being potentially useful for the meas... |
gr-qc/9711025 | Andre van Tonder | Miquel Dorca (Enrico Fermi Institute, The University of Chicago) | Stress-energy tensor in colliding plane wave space-times: An
approximation procedure | 27 pages, Latex file plus three figures in PostScript | Nucl.Phys. B524 (1998) 397-426 | 10.1016/S0550-3213(98)00198-9 | null | gr-qc | null | In a recent work on the quantization of a massless scalar field in a
particular colliding plane wave space-time, we computed the vacuum expectation
value of the stress-energy tensor on the physical state which corresponds to
the Minkowski vacuum before the collision of the waves. We did such a
calculation in a region... | [
{
"created": "Thu, 6 Nov 1997 21:26:21 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Nov 1997 04:04:53 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Dorca",
"Miquel",
"",
"Enrico Fermi Institute, The University of Chicago"
]
] | In a recent work on the quantization of a massless scalar field in a particular colliding plane wave space-time, we computed the vacuum expectation value of the stress-energy tensor on the physical state which corresponds to the Minkowski vacuum before the collision of the waves. We did such a calculation in a region c... |
1901.06258 | Dirk Puetzfeld | Dirk Puetzfeld, Yuri N. Obukhov | Operational significance of the deviation equation in relativistic
geodesy | 9 pages, 4 figures, contribution to the "Encyclopedia of Geodesy".
arXiv admin note: text overlap with arXiv:1811.10474 | E. Grafarend (eds), Encyclopedia of Geodesy. Encyclopedia of Earth
Sciences Series. Springer, Cham, 2019 | 10.1007/978-3-319-02370-0_164-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deviation equation: Second order differential equation for the 4-vector which
measures the distance between reference points on neighboring world lines in
spacetime manifolds.
Relativistic geodesy: Science representing the Earth (or any planet),
including the measurement of its gravitational field, in a four-dimens... | [
{
"created": "Thu, 17 Jan 2019 09:51:57 GMT",
"version": "v1"
}
] | 2019-01-21 | [
[
"Puetzfeld",
"Dirk",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | Deviation equation: Second order differential equation for the 4-vector which measures the distance between reference points on neighboring world lines in spacetime manifolds. Relativistic geodesy: Science representing the Earth (or any planet), including the measurement of its gravitational field, in a four-dimensiona... |
2009.12332 | Quentin Henry | Quentin Henry, Guillaume Faye, Luc Blanchet | Hamiltonian for tidal interactions in compact binary systems to
next-to-next-to-leading post-Newtonian order | 10 pages | Phys. Rev. D 102, 124074 (2020) | 10.1103/PhysRevD.102.124074 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In previous works, we obtained the leading, next-to-leading and
next-to-next-to-leading (NNL) post-Newtonian (PN) corrections in the
conservative tidal interactions between two compact non-spinning objects using
a Lagrangian of effective field theory (EFT) in harmonic coordinates. In the
present paper, we compute the... | [
{
"created": "Fri, 25 Sep 2020 16:37:19 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Dec 2020 08:52:52 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Henry",
"Quentin",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Blanchet",
"Luc",
""
]
] | In previous works, we obtained the leading, next-to-leading and next-to-next-to-leading (NNL) post-Newtonian (PN) corrections in the conservative tidal interactions between two compact non-spinning objects using a Lagrangian of effective field theory (EFT) in harmonic coordinates. In the present paper, we compute the c... |
1007.4647 | Ion I. Cotaescu | Ion I. Cotaescu and Cosmin Crucean | The de Sitter QED in Coulomb gauge: first order transition amplitudes | 46 pages, 22 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the de Sitter QED in Coulomb gauge assuming that the quantum
modes are prepared by a global apparatus which is able to determine a stable
and invariant vacuum state, independent on the local coordinates. Then we
proceed in traditional manner postulating the appropriate equal-time
commutators and anti-com... | [
{
"created": "Tue, 27 Jul 2010 09:24:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jun 2011 08:40:12 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Jul 2011 08:05:08 GMT",
"version": "v3"
},
{
"created": "Wed, 31 Oct 2012 12:20:25 GMT",
"version": "v4"
}
] | 2012-11-01 | [
[
"Cotaescu",
"Ion I.",
""
],
[
"Crucean",
"Cosmin",
""
]
] | We construct the de Sitter QED in Coulomb gauge assuming that the quantum modes are prepared by a global apparatus which is able to determine a stable and invariant vacuum state, independent on the local coordinates. Then we proceed in traditional manner postulating the appropriate equal-time commutators and anti-commu... |
2110.04608 | Igor Bogush M.Sc. | Kirill Kobialko, Igor Bogush, Dmitri Gal'tsov | Killing tensors in foliated spacetimes and photon surfaces | 15 pages, to be submitted to the Proceedings of the 16th Marcel
Grossmann meeting | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a recently proposed geometric method for constructing a nontrivial
Killing tensor of rank two in a foliated spacetime of codimension one that
lifts trivial Killing tensors from slices to the entire manifold. The existence
of nontrivial Killing tensor is closely related to generalized photon surfaces.
The m... | [
{
"created": "Sat, 9 Oct 2021 16:39:46 GMT",
"version": "v1"
}
] | 2021-10-12 | [
[
"Kobialko",
"Kirill",
""
],
[
"Bogush",
"Igor",
""
],
[
"Gal'tsov",
"Dmitri",
""
]
] | We discuss a recently proposed geometric method for constructing a nontrivial Killing tensor of rank two in a foliated spacetime of codimension one that lifts trivial Killing tensors from slices to the entire manifold. The existence of nontrivial Killing tensor is closely related to generalized photon surfaces. The met... |
gr-qc/9602053 | Friedrich Schein | F. Schein, P.C. Aichelburg (Institute for Theoretical Physics,
University of Vienna), W. Israel (University of Alberta) | String Supported Wormhole Spacetimes and Causality Violations | 12 pages, LaTeX, 1 figure | Phys.Rev.D54:3800-3805,1996 | 10.1103/PhysRevD.54.3800 | UWThPh-1996-3 | gr-qc | null | We construct a static axisymmetric wormhole from the gravitational field of
two Schwarzschild particles which are kept in equilibrium by strings (ropes)
extending to infinity. The wormhole is obtained by matching two
three-dimensional timelike surfaces surrounding each of the particles and thus
spacetime becomes non-... | [
{
"created": "Tue, 27 Feb 1996 12:33:22 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Schein",
"F.",
"",
"Institute for Theoretical Physics,\n University of Vienna"
],
[
"Aichelburg",
"P. C.",
"",
"Institute for Theoretical Physics,\n University of Vienna"
],
[
"Israel",
"W.",
"",
"University of Alberta"
]
] | We construct a static axisymmetric wormhole from the gravitational field of two Schwarzschild particles which are kept in equilibrium by strings (ropes) extending to infinity. The wormhole is obtained by matching two three-dimensional timelike surfaces surrounding each of the particles and thus spacetime becomes non-si... |
gr-qc/0508072 | Steven Carlip | S. Carlip | A Note on Real Tunneling Geometries | 5 pages | Class.Quant.Grav.22:4381-4384,2005 | 10.1088/0264-9381/22/20/N03 | UCD-05-09 | gr-qc | null | In the Hartle-Hawking ``no boundary'' approach to quantum cosmology, a real
tunneling geometry is a configuration that represents a transition from a
compact Riemannian spacetime to a Lorentzian universe. I complete an earlier
proof that in three spacetime dimensions, such a transition is ``probable,'' in
the sense t... | [
{
"created": "Wed, 17 Aug 2005 17:16:23 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Carlip",
"S.",
""
]
] | In the Hartle-Hawking ``no boundary'' approach to quantum cosmology, a real tunneling geometry is a configuration that represents a transition from a compact Riemannian spacetime to a Lorentzian universe. I complete an earlier proof that in three spacetime dimensions, such a transition is ``probable,'' in the sense tha... |
1812.11379 | Mark D. Roberts | Mark D. Roberts | Rotational Dimensional Reduction | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rotational energy dissipation in the solar system confines the planets to the
ecliptic, this can be thought of as a dimensional reduction from three
dimensions to two. It is argued that the same mechanism restricts five
dimensional matter to four dimensional spacetime. The result is sensitive to
geometric configurati... | [
{
"created": "Sat, 29 Dec 2018 15:25:28 GMT",
"version": "v1"
}
] | 2019-01-01 | [
[
"Roberts",
"Mark D.",
""
]
] | Rotational energy dissipation in the solar system confines the planets to the ecliptic, this can be thought of as a dimensional reduction from three dimensions to two. It is argued that the same mechanism restricts five dimensional matter to four dimensional spacetime. The result is sensitive to geometric configuration... |
2004.10815 | Zbigniew Haba | Z. Haba | Power spectrum of stochastic wave and diffusion equations in the warm
inflation models | 8 pages,published version | Eur.Phys.J.C80(2020),564 | 10.1140/epjc/s10052-020-8135-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss dissipative stochastic wave and diffusion equations resulting from
an interaction of the inflaton with an environment in an external expanding
metric. We show that a diffusion equation well approximates the wave equation
in a strong friction limit. We calculate the long wave power spectrum of the
wave equa... | [
{
"created": "Wed, 22 Apr 2020 19:32:44 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2020 19:48:50 GMT",
"version": "v2"
}
] | 2020-06-25 | [
[
"Haba",
"Z.",
""
]
] | We discuss dissipative stochastic wave and diffusion equations resulting from an interaction of the inflaton with an environment in an external expanding metric. We show that a diffusion equation well approximates the wave equation in a strong friction limit. We calculate the long wave power spectrum of the wave equati... |
2312.10685 | Gen Ye | Gen Ye, Mian Zhu, Yong Cai | Null energy condition violation during inflation and pulsar timing array
observations | 14 pages plus one appendix, 4 figures; match published version;
reference added; correct a typo in eq.15 | JHEP 02 (2024) 008 | 10.1007/JHEP02(2024)008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, evidence of stochastic gravitational wave background (SGWB) signals
observed by pulsar timing array (PTA) collaborations, has prompted
investigations into their origins. We explore the compatibility of a proposed
inflationary scenario, incorporating an intermediate null energy condition
(NEC)-violating phas... | [
{
"created": "Sun, 17 Dec 2023 11:09:28 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Feb 2024 08:43:44 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Feb 2024 08:53:15 GMT",
"version": "v3"
},
{
"created": "Wed, 14 Aug 2024 08:42:34 GMT",
"version": "v4"
}
] | 2024-08-15 | [
[
"Ye",
"Gen",
""
],
[
"Zhu",
"Mian",
""
],
[
"Cai",
"Yong",
""
]
] | Recently, evidence of stochastic gravitational wave background (SGWB) signals observed by pulsar timing array (PTA) collaborations, has prompted investigations into their origins. We explore the compatibility of a proposed inflationary scenario, incorporating an intermediate null energy condition (NEC)-violating phase,... |
gr-qc/0012087 | T. P. Singh | T. P. Singh | Comparing quantum black holes and naked singularities | 13 pages, 1 figure, based on a talk given at JGRG10, Osaka, Sep.
2000. To appear in the Conference Proceedings | null | null | null | gr-qc | null | There are models of gravitational collapse in classical general relativity
which admit the formation of naked singularities as well as black holes. These
include fluid models as well as models with scalar fields as matter. Even if
fluid models were to be regarded as unphysical in their matter content, the
remaining c... | [
{
"created": "Thu, 21 Dec 2000 11:55:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Singh",
"T. P.",
""
]
] | There are models of gravitational collapse in classical general relativity which admit the formation of naked singularities as well as black holes. These include fluid models as well as models with scalar fields as matter. Even if fluid models were to be regarded as unphysical in their matter content, the remaining cla... |
gr-qc/0102104 | Yoonbai Kim | Bok Keun Chung, Jin-Mo Chung, Seongtag Kim, Yoonbai Kim | Gravitating Self-dual Chern-Simons Solitons | 38 pages, 8 figures (Pslatex files are included in the text.) Two
references are added. To appear in Annals of Physics | Annals Phys.291:276-301,2001 | 10.1006/aphy.2001.6162 | null | gr-qc | null | Self-dual solitons of Chern-Simons Higgs theory are examined in curved
spacetime. We derive duality transformation of the Einstein Chern-Simons Higgs
theory within path integral formalism and study various aspects of dual
formulation including derivation of Bogomolnyi type bound. We find all possible
rotationally-sym... | [
{
"created": "Sat, 24 Feb 2001 04:15:54 GMT",
"version": "v1"
},
{
"created": "Fri, 18 May 2001 16:45:21 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Chung",
"Bok Keun",
""
],
[
"Chung",
"Jin-Mo",
""
],
[
"Kim",
"Seongtag",
""
],
[
"Kim",
"Yoonbai",
""
]
] | Self-dual solitons of Chern-Simons Higgs theory are examined in curved spacetime. We derive duality transformation of the Einstein Chern-Simons Higgs theory within path integral formalism and study various aspects of dual formulation including derivation of Bogomolnyi type bound. We find all possible rotationally-symme... |
gr-qc/0303087 | Jose Francisco da Rocha Neto | B. M. Pimentel, P. J. Pompeia, J. F. da Rocha-Neto and R. G. Teixeira | The Teleparallel Lagrangian and Hamilton-Jacobi Formalism | 11 pages, no figures, to appear in GRG | Gen.Rel.Grav. 35 (2003) 877-884 | 10.1023/A:1022951321978 | null | gr-qc | null | We analyze the Teleparallel Equivalent of General Relativity (TEGR) from the
point of view of Hamilton-Jacobi approach for singular systems
| [
{
"created": "Fri, 21 Mar 2003 18:39:04 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Pimentel",
"B. M.",
""
],
[
"Pompeia",
"P. J.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
],
[
"Teixeira",
"R. G.",
""
]
] | We analyze the Teleparallel Equivalent of General Relativity (TEGR) from the point of view of Hamilton-Jacobi approach for singular systems |
1001.4338 | Kouji Nakamura | Kouji Nakamura | Consistency of Equations for the Single Scalar Field Case in
Second-order Gauge-invariant Cosmological Perturbation Theory | 4 pages, no figure, prepared as a proceedings for The Nineteenth
Workshop on General Relativity and Gravitation in Japan (JGRG19) | null | null | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derived the second-order perturbations of the Einstein equations and the
Klein-Gordon equation for a generic situation in terms of gauge-invariant
variables. The consistency of all the equations is confirmed. This confirmation
implies that all the derived equations of the second order are self-consistent
and these... | [
{
"created": "Mon, 25 Jan 2010 08:21:36 GMT",
"version": "v1"
}
] | 2010-01-26 | [
[
"Nakamura",
"Kouji",
""
]
] | We derived the second-order perturbations of the Einstein equations and the Klein-Gordon equation for a generic situation in terms of gauge-invariant variables. The consistency of all the equations is confirmed. This confirmation implies that all the derived equations of the second order are self-consistent and these e... |
2311.04274 | Robin Fynn Diedrichs | Robin Fynn Diedrichs, Daniel Schmitt, Laura Sagunski | Binary Systems in Massive Scalar-Tensor Theories: Next-to-Leading Order
Gravitational Waveform from Effective Field Theory | 35 pages, 6 figures | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Neutron star binaries and their associated gravitational wave signal
facilitate precision tests of General Relativity. Any deviation of the detected
gravitational waveform from General Relativity would therefore be a smoking gun
signature of new physics, in the form of additional forces, dark matter
particles, or ext... | [
{
"created": "Tue, 7 Nov 2023 19:00:02 GMT",
"version": "v1"
}
] | 2023-11-09 | [
[
"Diedrichs",
"Robin Fynn",
""
],
[
"Schmitt",
"Daniel",
""
],
[
"Sagunski",
"Laura",
""
]
] | Neutron star binaries and their associated gravitational wave signal facilitate precision tests of General Relativity. Any deviation of the detected gravitational waveform from General Relativity would therefore be a smoking gun signature of new physics, in the form of additional forces, dark matter particles, or extra... |
0805.3089 | Richard Woodard | R. P. Woodard (University of Florida) | Cosmology is not a Renormalization Group Flow | 4 pages, no figures, uses revtex4, version 2 revised slightly for
publication in Physical Review Letters | Phys.Rev.Lett.101:081301,2008 | 10.1103/PhysRevLett.101.081301 | UFIFT-QG-08-04 | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A critical examination is made of two simple implementations of the idea that
cosmology can be viewed as a renormalization group flow. Both implementations
are shown to fail when applied to a massless, minimally coupled scalar with a
quartic self-interaction on a locally de Sitter background. Cosmological
evolution i... | [
{
"created": "Tue, 20 May 2008 14:31:13 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Aug 2008 13:04:05 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | A critical examination is made of two simple implementations of the idea that cosmology can be viewed as a renormalization group flow. Both implementations are shown to fail when applied to a massless, minimally coupled scalar with a quartic self-interaction on a locally de Sitter background. Cosmological evolution in ... |
2206.08677 | Jos\'e Jaime Terente D\'iaz | Mindaugas Kar\v{c}iauskas and Jos\'e Jaime Terente D\'iaz | Slow-Roll Inflation in the Jordan Frame | 28 pages, 6 figures | Phys. Rev. D 106, 083526 (2022) | 10.1103/PhysRevD.106.083526 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflation models based on scalar-tensor theories of gravity are formulated in
the Jordan frame but most often analysed in the Einstein frame. The
transformation between the frames is not always desirable. In this work we
formulate slow-roll conditions in the Jordan frame. This is achieved by
comparing different backg... | [
{
"created": "Fri, 17 Jun 2022 10:31:15 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Sep 2022 10:03:50 GMT",
"version": "v2"
}
] | 2022-10-28 | [
[
"Karčiauskas",
"Mindaugas",
""
],
[
"Díaz",
"José Jaime Terente",
""
]
] | Inflation models based on scalar-tensor theories of gravity are formulated in the Jordan frame but most often analysed in the Einstein frame. The transformation between the frames is not always desirable. In this work we formulate slow-roll conditions in the Jordan frame. This is achieved by comparing different backgro... |
2005.11933 | Meirong Tang | Meirong Tang, Jiancheng Wang | The eccentricity enhancement effect of
intermediate-mass-ratio-inspirals: dark matter and black hole mass | 13 pages, 7 figures | null | 10.1088/1674-1137/abc680 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was found that the dark matter (DM) in the
intermediate-mass-ratio-inspiral (IMRI) system has a significant enhancement
effect on the orbital eccentricity of the stellar massive compact object, such
as a black hole (BH), which may be tested by space-based gravitational wave
(GW) detectors including LISA, Taiji and... | [
{
"created": "Mon, 25 May 2020 05:54:17 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Tang",
"Meirong",
""
],
[
"Wang",
"Jiancheng",
""
]
] | It was found that the dark matter (DM) in the intermediate-mass-ratio-inspiral (IMRI) system has a significant enhancement effect on the orbital eccentricity of the stellar massive compact object, such as a black hole (BH), which may be tested by space-based gravitational wave (GW) detectors including LISA, Taiji and T... |
gr-qc/9501002 | Juan M. Aguirregabiria | J M Aguirregabiria, A Chamorro, K S Virbhadra | Energy and angular momentum of charged rotating black holes | 18 pages, no figures, REVTeX. This is a revised version with the same
results, but we now use a previous work by G\"urses and G\"ursey to put our
results in perspective | Gen.Rel.Grav.28:1393-1400,1996 | 10.1007/BF02109529 | null | gr-qc | null | We show that the pseudotensors of Einstein, Tolman, Landau and Lifshitz,
Papapetrou, and Weinberg (ETLLPW) give the same distributions of energy, linear
momentum and angular momentum, for any Kerr-Schild metric. This result
generalizes a previous work by G\"urses and G\"ursey that dealt only with the
pseudotensors of... | [
{
"created": "Tue, 3 Jan 1995 14:44:00 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 1995 18:12:00 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Mar 1995 09:08:00 GMT",
"version": "v3"
}
] | 2010-03-03 | [
[
"Aguirregabiria",
"J M",
""
],
[
"Chamorro",
"A",
""
],
[
"Virbhadra",
"K S",
""
]
] | We show that the pseudotensors of Einstein, Tolman, Landau and Lifshitz, Papapetrou, and Weinberg (ETLLPW) give the same distributions of energy, linear momentum and angular momentum, for any Kerr-Schild metric. This result generalizes a previous work by G\"urses and G\"ursey that dealt only with the pseudotensors of E... |
1204.4806 | Joan Sola | Spyros Basilakos, David Polarski, and Joan Sola | Generalizing the running vacuum energy model and comparing with the
entropic-force models | Version accepted in Phys. Rev. D. LaTeX, 24 pages and one figure.
Slightly extended discussion | Phys.Rev. D86 (2012) 043010 | 10.1103/PhysRevD.86.043010 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the previously proposed running vacuum energy model by
including a term proportional to \dot{H}, in addition to the existing H^2 term.
We show that the added degree of freedom is very constrained if both low
redshift and high redshift data are taken into account. Best-fit models are
undistinguishable fr... | [
{
"created": "Sat, 21 Apr 2012 12:03:56 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jul 2012 07:08:57 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Basilakos",
"Spyros",
""
],
[
"Polarski",
"David",
""
],
[
"Sola",
"Joan",
""
]
] | We generalize the previously proposed running vacuum energy model by including a term proportional to \dot{H}, in addition to the existing H^2 term. We show that the added degree of freedom is very constrained if both low redshift and high redshift data are taken into account. Best-fit models are undistinguishable from... |
1401.2962 | Sergey Pavluchenko A. | Dmitry Chirkov, Sergey Pavluchenko, Alexey Toporensky | Exact exponential solutions in Einstein-Gauss-Bonnet flat anisotropic
cosmology | 10 pages | Mod. Phys. Lett. A 29, 1450093 (2014) | 10.1142/S021773231450093X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we are looking for the exponential solutions (i.e. the
solutions with the scale factors change exponentially over time) in the
Einstein-Gauss-Bonnet gravity. We argue that we found all possible
non-constant-volume solutions (up to permutations) in lower dimensions ((4+1)
and (5+1)) and developed a schem... | [
{
"created": "Mon, 13 Jan 2014 19:45:35 GMT",
"version": "v1"
}
] | 2014-08-19 | [
[
"Chirkov",
"Dmitry",
""
],
[
"Pavluchenko",
"Sergey",
""
],
[
"Toporensky",
"Alexey",
""
]
] | In this paper we are looking for the exponential solutions (i.e. the solutions with the scale factors change exponentially over time) in the Einstein-Gauss-Bonnet gravity. We argue that we found all possible non-constant-volume solutions (up to permutations) in lower dimensions ((4+1) and (5+1)) and developed a scheme ... |
gr-qc/9905034 | Hiromi Saida | H.Saida and M.Sakagami | Black hole radiation with high frequency dispersion | 9 pages, 10 figures, submitted to Phys.Rev.D | Phys.Rev. D61 (2000) 084023 | 10.1103/PhysRevD.61.084023 | KUCP0134 | gr-qc | null | We consider one model of a black hole radiation, in which the equation of
motion of a matter field is modified to cut off high frequency modes. The
spectrum in the model has already been analytically derived in low frequency
range, which has resulted in the Planckian distributin of the Hawking
temperature. On the oth... | [
{
"created": "Tue, 11 May 1999 10:34:14 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Aug 1999 11:26:00 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Saida",
"H.",
""
],
[
"Sakagami",
"M.",
""
]
] | We consider one model of a black hole radiation, in which the equation of motion of a matter field is modified to cut off high frequency modes. The spectrum in the model has already been analytically derived in low frequency range, which has resulted in the Planckian distributin of the Hawking temperature. On the other... |
gr-qc/0602024 | Orchidea Maria Lecian | Orchidea Maria Lecian Giovanni Montani | On the Kaluza-Klein geometrization of the Electro-Weak Model within a
gauge theory of the 5-dimensional Lorentz group | 21 pages, no figures, to appear on IJMPD | Int.J.Mod.Phys. D15 (2006) 717-736 | 10.1142/S0218271806008449 | null | gr-qc | null | The geometrization of the Electro-Weak Model is achieved in a 5-dimensional
Riemann-Cartan framework. Matter spinorial fields are extended to 5 dimensions
by the choice of a proper dependence on the extra-coordinate and of a
normalization factor. U(1) weak hyper-charge gauge fields are obtained from a
Kaluza-Klein sc... | [
{
"created": "Tue, 7 Feb 2006 16:41:56 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Montani",
"Orchidea Maria Lecian Giovanni",
""
]
] | The geometrization of the Electro-Weak Model is achieved in a 5-dimensional Riemann-Cartan framework. Matter spinorial fields are extended to 5 dimensions by the choice of a proper dependence on the extra-coordinate and of a normalization factor. U(1) weak hyper-charge gauge fields are obtained from a Kaluza-Klein sche... |
2003.05790 | Hamideh Nadi | Behrouz Mirza, Zahra Mirzaiyan, Hamideh Nadi | Maximum rate of entropy emission | 18 pages, 1 figure | Annals of Physics 415C (2020) 168117 | 10.1016/j.aop.2020.168117 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that adding hair like electric charge or angular momentum to the
black hole decreases the amount of entropy emission. This motivates us to study
the emission rate of entropy from black holes and conjecture a maximum limit
(upper bound) on the rate of local entropy emission ($\dot{S}$) for thermal
systems ... | [
{
"created": "Thu, 12 Mar 2020 13:30:10 GMT",
"version": "v1"
}
] | 2020-03-13 | [
[
"Mirza",
"Behrouz",
""
],
[
"Mirzaiyan",
"Zahra",
""
],
[
"Nadi",
"Hamideh",
""
]
] | It is shown that adding hair like electric charge or angular momentum to the black hole decreases the amount of entropy emission. This motivates us to study the emission rate of entropy from black holes and conjecture a maximum limit (upper bound) on the rate of local entropy emission ($\dot{S}$) for thermal systems in... |
gr-qc/0401076 | Matthew D. Duez | Matthew D. Duez, Stuart L. Shapiro, and Hwei-Jang Yo (University of
Illinois) | Relativistic Hydrodynamic Evolutions with Black Hole Excision | 17 pages, 14 figures, submitted to PRD | Phys.Rev. D69 (2004) 104016 | 10.1103/PhysRevD.69.104016 | null | gr-qc astro-ph | null | We present a numerical code designed to study astrophysical phenomena
involving dynamical spacetimes containing black holes in the presence of
relativistic hydrodynamic matter. We present evolutions of the collapse of a
fluid star from the onset of collapse to the settling of the resulting black
hole to a final stati... | [
{
"created": "Fri, 16 Jan 2004 21:19:36 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Duez",
"Matthew D.",
"",
"University of\n Illinois"
],
[
"Shapiro",
"Stuart L.",
"",
"University of\n Illinois"
],
[
"Yo",
"Hwei-Jang",
"",
"University of\n Illinois"
]
] | We present a numerical code designed to study astrophysical phenomena involving dynamical spacetimes containing black holes in the presence of relativistic hydrodynamic matter. We present evolutions of the collapse of a fluid star from the onset of collapse to the settling of the resulting black hole to a final station... |
gr-qc/0506016 | Jiri Podolsky | Jiri Podolsky and Otakar Svitek | Radiative spacetimes approaching the Vaidya metric | 12 pages, 3 figures | Phys.Rev. D71 (2005) 124001 | 10.1103/PhysRevD.71.124001 | null | gr-qc | null | We analyze a class of exact type II solutions of the Robinson-Trautman family
which contain pure radiation and (possibly) a cosmological constant. It is
shown that these spacetimes exist for any sufficiently smooth initial data, and
that they approach the spherically symmetric Vaidya-(anti-)de Sitter metric. We
also ... | [
{
"created": "Fri, 3 Jun 2005 09:53:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Podolsky",
"Jiri",
""
],
[
"Svitek",
"Otakar",
""
]
] | We analyze a class of exact type II solutions of the Robinson-Trautman family which contain pure radiation and (possibly) a cosmological constant. It is shown that these spacetimes exist for any sufficiently smooth initial data, and that they approach the spherically symmetric Vaidya-(anti-)de Sitter metric. We also in... |
2401.03474 | Shaoqi Hou | Shaoqi Hou, Xi-Long Fan, Tao Zhu, Zong-Hong Zhu | Nontensorial gravitational wave polarizations from the tensorial degrees
of freedom: I. Linearized Lorentz-violating theory of gravity with s tensor | 14 pages, 6 figures. Modified according to Referee report | Phys Rev D 109, 084011 (2024) | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity predicts the existence of only two tensorial gravitational
wave polarizations, while a generic metric theories of gravity can possess up
to four additional polarizations, including two vector and two scalar ones.
These vector/scalar polarizations are in general generated by the intrinsic new
vector... | [
{
"created": "Sun, 7 Jan 2024 12:53:11 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Feb 2024 07:30:21 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Apr 2024 10:57:45 GMT",
"version": "v3"
}
] | 2024-04-12 | [
[
"Hou",
"Shaoqi",
""
],
[
"Fan",
"Xi-Long",
""
],
[
"Zhu",
"Tao",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | General relativity predicts the existence of only two tensorial gravitational wave polarizations, while a generic metric theories of gravity can possess up to four additional polarizations, including two vector and two scalar ones. These vector/scalar polarizations are in general generated by the intrinsic new vector/s... |
gr-qc/0407017 | Martin Bojowald | Martin Bojowald | Spherically Symmetric Quantum Geometry: States and Basic Operators | 26 pages | Class.Quant.Grav. 21 (2004) 3733-3753 | 10.1088/0264-9381/21/15/008 | AEI-2004-048 | gr-qc | null | The kinematical setting of spherically symmetric quantum geometry, derived
from the full theory of loop quantum gravity, is developed. This extends
previous studies of homogeneous models to inhomogeneous ones where interesting
field theory aspects arise. A comparison between a reduced quantization and a
derivation of... | [
{
"created": "Mon, 5 Jul 2004 13:43:48 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jul 2004 14:17:16 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Bojowald",
"Martin",
""
]
] | The kinematical setting of spherically symmetric quantum geometry, derived from the full theory of loop quantum gravity, is developed. This extends previous studies of homogeneous models to inhomogeneous ones where interesting field theory aspects arise. A comparison between a reduced quantization and a derivation of t... |
gr-qc/0501022 | Pierre Martinetti | Pierre Martinetti | What kind of noncommutative geometry for quantum gravity ? | null | Mod.Phys.Lett. A20 (2005) 1315 | 10.1142/S0217732305017780 | null | gr-qc | null | We give a brief account of the description of the standard model in
noncommutative geometry as well as the thermal time hypothesis, questioning
their relevance for quantum gravity.
| [
{
"created": "Fri, 7 Jan 2005 22:14:27 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jun 2005 12:36:28 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Martinetti",
"Pierre",
""
]
] | We give a brief account of the description of the standard model in noncommutative geometry as well as the thermal time hypothesis, questioning their relevance for quantum gravity. |
1608.03212 | Gregory Horndeski | Gregory W. Horndeski | Lagrange Multipliers and Third Order Scalar-Tensor Field Theories | 45 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a space of 4-dimensions, I will examine constrained variational problems
in which the Lagrangian, and constraint scalar density, are concomitants of a
(pseudo-Riemannian) metric tensor and its first two derivatives. The Lagrange
multiplier for these constrained extremal problems will be a scalar field. For
suitabl... | [
{
"created": "Tue, 9 Aug 2016 18:17:21 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Sep 2016 00:42:39 GMT",
"version": "v2"
}
] | 2016-09-15 | [
[
"Horndeski",
"Gregory W.",
""
]
] | In a space of 4-dimensions, I will examine constrained variational problems in which the Lagrangian, and constraint scalar density, are concomitants of a (pseudo-Riemannian) metric tensor and its first two derivatives. The Lagrange multiplier for these constrained extremal problems will be a scalar field. For suitable ... |
1304.6936 | Chandrachur Chakraborty | Chandrachur Chakraborty, Parthasarathi Majumdar | Strong gravity Lense-Thirring Precession in Kerr and Kerr-Taub-NUT
spacetimes | 9 pages, 2 figures, version accepted for publication in Classical and
Quantum Gravity | Class. Quantum Grav. 31 (2014) 075006 | 10.1088/0264-9381/31/7/075006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact expression derived in the literature for the rate of dragging of
inertial frames (Lense-Thirring (LT) precession) in a general stationary
spacetime, is reviewed. The exact LT precession frequencies for Kerr,
Kerr-Taub-NUT and Taub-NUT spacetimes are explicitly derived. Remarkably, in
the case of the zero ang... | [
{
"created": "Thu, 25 Apr 2013 15:28:02 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Feb 2014 14:11:33 GMT",
"version": "v2"
}
] | 2014-03-06 | [
[
"Chakraborty",
"Chandrachur",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | An exact expression derived in the literature for the rate of dragging of inertial frames (Lense-Thirring (LT) precession) in a general stationary spacetime, is reviewed. The exact LT precession frequencies for Kerr, Kerr-Taub-NUT and Taub-NUT spacetimes are explicitly derived. Remarkably, in the case of the zero angul... |
gr-qc/0701014 | Parthasarathi Majumdar | Parthasarathi Majumdar | Generalized Hawking-Page Phase Transition | 9 Pages, Latex with 2 eps figures | Class.Quant.Grav.24:1747-1754,2007 | 10.1088/0264-9381/24/7/005 | null | gr-qc | null | The issue of radiant spherical black holes being in stable thermal
equilibrium with their radiation bath is reconsidered. Using a simple
equilibrium statistical mechanical analysis incorporating Gaussian thermal
fluctuations in a canonical ensemble of isolated horizons, the heat capacity is
shown to diverge at a crit... | [
{
"created": "Mon, 1 Jan 2007 10:51:17 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Majumdar",
"Parthasarathi",
""
]
] | The issue of radiant spherical black holes being in stable thermal equilibrium with their radiation bath is reconsidered. Using a simple equilibrium statistical mechanical analysis incorporating Gaussian thermal fluctuations in a canonical ensemble of isolated horizons, the heat capacity is shown to diverge at a critic... |
2010.10063 | Alessandro Pesci | Alessandro Pesci | Expectation values of minimum-length Ricci scalar | v2: 9 pages; clarification of a point in the discussion of the
Lorentz case; added a possible connection with other approaches; it
corresponds to the published version; in memory of Prof. Thanu Padmanabhan | Int. J. Mod. Phys. D 31 (2022) 2250007 | 10.1142/S0218271822500079 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a specific model, implementing the existence of a
fundamental limit distance $L_0$ between (space or time separated) points in
spacetime, which in the recent past has exhibited the intriguing feature of
having a minimum-length Ricci scalar $R_{(q)}$ that does not approach the
ordinary Ricci... | [
{
"created": "Tue, 20 Oct 2020 06:45:03 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jan 2022 15:31:35 GMT",
"version": "v2"
}
] | 2022-03-07 | [
[
"Pesci",
"Alessandro",
""
]
] | In this paper, we consider a specific model, implementing the existence of a fundamental limit distance $L_0$ between (space or time separated) points in spacetime, which in the recent past has exhibited the intriguing feature of having a minimum-length Ricci scalar $R_{(q)}$ that does not approach the ordinary Ricci s... |
1911.06050 | Sebastian Khan | Sebastian Khan, Frank Ohme, Katerina Chatziioannou, Mark Hannam | Including higher order multipoles in gravitational-wave models for
precessing binary black holes | 13 pages, 8 figures | Phys. Rev. D 101, 024056 (2020) | 10.1103/PhysRevD.101.024056 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Estimates of the source parameters of gravitational-wave (GW) events produced
by compact binary mergers rely on theoretical models for the GW signal. We
present the first frequency-domain model for inspiral, merger and ringdown of
the GW signal from precessing binary-black-hole systems that also includes
multipoles b... | [
{
"created": "Thu, 14 Nov 2019 11:57:40 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Mar 2020 11:23:26 GMT",
"version": "v2"
}
] | 2020-03-16 | [
[
"Khan",
"Sebastian",
""
],
[
"Ohme",
"Frank",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Hannam",
"Mark",
""
]
] | Estimates of the source parameters of gravitational-wave (GW) events produced by compact binary mergers rely on theoretical models for the GW signal. We present the first frequency-domain model for inspiral, merger and ringdown of the GW signal from precessing binary-black-hole systems that also includes multipoles bey... |
gr-qc/0405076 | John W. Moffat | J. W. Moffat | Modified Gravitational Theory and the Pioneer 10 and 11 Spacecraft
Anomalous Acceleration | 5 pages. LaTex file. No figures | null | null | null | gr-qc | null | The nonsymmetric gravitational theory leads to a modified acceleration law
that can at intermediate distance ranges account for the anomalous acceleration
experienced by the Pioneer 10 and 11 spacecraft.
| [
{
"created": "Fri, 14 May 2004 16:38:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Moffat",
"J. W.",
""
]
] | The nonsymmetric gravitational theory leads to a modified acceleration law that can at intermediate distance ranges account for the anomalous acceleration experienced by the Pioneer 10 and 11 spacecraft. |
1707.08975 | Pedro Gir\~ao | Jo\~ao L. Costa, Pedro M. Gir\~ao, Jos\'e Nat\'ario, Jorge Drumond
Silva | On the occurrence of mass inflation for the Einstein-Maxwell-scalar
field system with a cosmological constant and an exponential Price law | 51 pages, 6 figures; matches final published version; v3: corrected a
typo in equation (13) | Commun. Math. Phys. (2018) 361: 289 | 10.1007/s00220-018-3122-z | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the spherically symmetric characteristic initial data
problem for the Einstein-Maxwell-scalar field system with a positive
cosmological constant in the interior of a black hole, assuming an exponential
Price law along the event horizon. More precisely, we construct open sets of
characteristic d... | [
{
"created": "Thu, 27 Jul 2017 18:01:10 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Mar 2018 13:24:42 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Sep 2018 09:53:49 GMT",
"version": "v3"
}
] | 2018-09-18 | [
[
"Costa",
"João L.",
""
],
[
"Girão",
"Pedro M.",
""
],
[
"Natário",
"José",
""
],
[
"Silva",
"Jorge Drumond",
""
]
] | In this paper we study the spherically symmetric characteristic initial data problem for the Einstein-Maxwell-scalar field system with a positive cosmological constant in the interior of a black hole, assuming an exponential Price law along the event horizon. More precisely, we construct open sets of characteristic dat... |
1805.10512 | Ra\'ul Lizardo-Castro | Alfredo Herrera-Aguilar, Ra\'ul Lizardo-Castro and Ulises Nucamendi | General relativistic formulas for mass and spin of a Kerr black hole in
terms of redshifts and orbital parameters | 7 pages in LaTeX, 1 figure, Title and abstract changed | Astron. Nachr. (2021) 1-7 | 10.1002/asna.202113904 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive closed formulas for the mass and spin parameters of a Kerr black
hole in terms of a minimal quantity of observational data: the red-/blue-shifts
of photons emitted by massive particles (stars) moving on geodesics around the
black hole and their respective orbital radius. It turns out that given a set
of two... | [
{
"created": "Sat, 26 May 2018 18:14:00 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2021 17:18:21 GMT",
"version": "v2"
}
] | 2021-02-17 | [
[
"Herrera-Aguilar",
"Alfredo",
""
],
[
"Lizardo-Castro",
"Raúl",
""
],
[
"Nucamendi",
"Ulises",
""
]
] | We derive closed formulas for the mass and spin parameters of a Kerr black hole in terms of a minimal quantity of observational data: the red-/blue-shifts of photons emitted by massive particles (stars) moving on geodesics around the black hole and their respective orbital radius. It turns out that given a set of two (... |
1912.12026 | Mohammad Sami | M. Sami, Shynaray Myrzakul and Mudhahir Al Ajm | Can massive neutrinos be responsible for late time phase transition
$\hat{\rm a}$ {\it la} deceleration to acceleration in our Universe? | 9 pages and 6 figures, typos corrected, minor clarification added, to
appear in Physics of the Dark Universe | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt a novel mechanism to understand the underlying cause of late-time
cosmic acceleration using a distinguished physical process taking place in the
late Universe. The turning of massive neutrinos from relativistic to
non-relativistic might cause a phase transition at late times. We implement
this idea using m... | [
{
"created": "Fri, 27 Dec 2019 08:47:43 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Mar 2020 10:44:22 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Jul 2020 03:07:56 GMT",
"version": "v3"
}
] | 2020-07-07 | [
[
"Sami",
"M.",
""
],
[
"Myrzakul",
"Shynaray",
""
],
[
"Ajm",
"Mudhahir Al",
""
]
] | We attempt a novel mechanism to understand the underlying cause of late-time cosmic acceleration using a distinguished physical process taking place in the late Universe. The turning of massive neutrinos from relativistic to non-relativistic might cause a phase transition at late times. We implement this idea using mas... |
2007.14575 | Chen Songbai | Xuan Zhou, Songbai Chen, Jiliang Jing | Chaotic motion of scalar particle coupling to Chern-Simons invariant in
Kerr black hole spacetime | 21 pages, 11 figures, Accepted for publication in EPJC | Eur. Phys. J. C (2021) 81:233 | 10.1140/epjc/s10052-021-09042-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present firstly the equation of motion for the test scalar particle
coupling to the Chern-Simons invariant in Kerr black hole spacetime by the
short-wave approximation. We have analyzed the dynamical behaviors of the test
coupled particles by applying techniques including Poincar\'e sections, fast
Lyapunov exponen... | [
{
"created": "Wed, 29 Jul 2020 03:40:28 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Mar 2021 02:47:19 GMT",
"version": "v2"
}
] | 2021-03-23 | [
[
"Zhou",
"Xuan",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We present firstly the equation of motion for the test scalar particle coupling to the Chern-Simons invariant in Kerr black hole spacetime by the short-wave approximation. We have analyzed the dynamical behaviors of the test coupled particles by applying techniques including Poincar\'e sections, fast Lyapunov exponent ... |
2305.06987 | Celia Escamilla-Rivera | Geovanny A. Rave-Franco and Celia Escamilla-Rivera | On primordial gravitational waves in Teleparallel Gravity | Honorable mention for Gravity Research Foundation 2023 Awards for
Essays on Gravitation. Comments welcome. 12 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Teleparallel Gravity is a gauge theory where gravity is a manifestation of
the torsion of space-time and its success relies on being a possible solution
to some problems of General Relativity. In this essay we introduce the
construction of the theory by defining its geometrical setup, and how we can
build it as a gau... | [
{
"created": "Thu, 11 May 2023 17:20:10 GMT",
"version": "v1"
}
] | 2023-05-12 | [
[
"Rave-Franco",
"Geovanny A.",
""
],
[
"Escamilla-Rivera",
"Celia",
""
]
] | Teleparallel Gravity is a gauge theory where gravity is a manifestation of the torsion of space-time and its success relies on being a possible solution to some problems of General Relativity. In this essay we introduce the construction of the theory by defining its geometrical setup, and how we can build it as a gauge... |
gr-qc/0009023 | Reg Cahill | Reginald T. Cahill, Christopher M. Klinger and Kirsty Kitto | Process Physics: Modelling Reality as Self-Organising Information | 9 pages, 4 figures | The Physicist 37 (2000) 191-195 | null | null | gr-qc | null | The new Process Physics models reality as self-organising relational
information and takes account of the limitations of logic, discovered by Godel
and extended by Chaitin, by using the concept of self-referential noise. Space
and quantum physics are emergent and unified, and described by a Quantum
Homotopic Field Th... | [
{
"created": "Fri, 8 Sep 2000 03:47:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cahill",
"Reginald T.",
""
],
[
"Klinger",
"Christopher M.",
""
],
[
"Kitto",
"Kirsty",
""
]
] | The new Process Physics models reality as self-organising relational information and takes account of the limitations of logic, discovered by Godel and extended by Chaitin, by using the concept of self-referential noise. Space and quantum physics are emergent and unified, and described by a Quantum Homotopic Field Theo... |
1812.05590 | Hector O. Silva | Hector O. Silva, Caio F. B. Macedo, Thomas P. Sotiriou, Leonardo
Gualtieri, Jeremy Sakstein, Emanuele Berti | On the stability of scalarized black hole solutions in
scalar-Gauss-Bonnet gravity | 8 pages, 3 figures. Added citations, updated Fig.2, minor changes to
the text. v3: Updated to match published version | Phys. Rev. D 99, 064011 (2019) | 10.1103/PhysRevD.99.064011 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories of gravity where a new scalar degree of freedom
couples to the Gauss-Bonnet invariant can exhibit the phenomenon of spontaneous
black hole scalarization. These theories admit both the classic black holes
predicted by general relativity as well as novel hairy black hole solutions.
The stability ... | [
{
"created": "Thu, 13 Dec 2018 18:57:45 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Dec 2018 17:26:21 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Mar 2019 03:54:37 GMT",
"version": "v3"
}
] | 2019-03-27 | [
[
"Silva",
"Hector O.",
""
],
[
"Macedo",
"Caio F. B.",
""
],
[
"Sotiriou",
"Thomas P.",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Sakstein",
"Jeremy",
""
],
[
"Berti",
"Emanuele",
""
]
] | Scalar-tensor theories of gravity where a new scalar degree of freedom couples to the Gauss-Bonnet invariant can exhibit the phenomenon of spontaneous black hole scalarization. These theories admit both the classic black holes predicted by general relativity as well as novel hairy black hole solutions. The stability of... |
2106.05926 | Bahram Shakerin | B. Shakerin, D.D. McNutt, B. Mattingly, A. Kar, W. Julius, M. Gorban,
C. Watson, P. Brown, J.S. Lee, E. W. Davis, G.B. Cleaver | Scalar Curvature Invariants in Classical and Quantum Gravity | Essay written for the Gravity Research Foundation 2021 Awards for
Essays on Gravitation | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A short review of scalar curvature invariants in gravity theories is
presented. We introduce how these invariants are constructed and discuss the
minimal number of invariants required for a given spacetime. We then discuss
applications of these invariants and focus on three topics that are of
particular interest in m... | [
{
"created": "Thu, 10 Jun 2021 17:18:48 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jun 2021 11:50:21 GMT",
"version": "v2"
}
] | 2021-06-14 | [
[
"Shakerin",
"B.",
""
],
[
"McNutt",
"D. D.",
""
],
[
"Mattingly",
"B.",
""
],
[
"Kar",
"A.",
""
],
[
"Julius",
"W.",
""
],
[
"Gorban",
"M.",
""
],
[
"Watson",
"C.",
""
],
[
"Brown",
"P.",
""... | A short review of scalar curvature invariants in gravity theories is presented. We introduce how these invariants are constructed and discuss the minimal number of invariants required for a given spacetime. We then discuss applications of these invariants and focus on three topics that are of particular interest in mod... |
1807.04584 | Jorma Louko | Jorma Louko | Thermality from a Rindler quench | 16 pages. v3: Expanded abstract, intro and conclusions. Published in
CQG | Class. Quant. Grav. 35, 205006 (2018) | 10.1088/1361-6382/aadb34 | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ultracold fermionic atoms in an optical lattice, with a sudden
position-dependent change (a quench) in the effective dispersion relation, have
been proposed by Rodr\'iguez-Laguna et al. as an analogue spacetime test of the
Unruh effect. We provide new support for this analogue by analysing a massless
scalar field on ... | [
{
"created": "Thu, 12 Jul 2018 12:50:57 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Jul 2018 15:23:02 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Oct 2018 13:44:05 GMT",
"version": "v3"
}
] | 2018-10-05 | [
[
"Louko",
"Jorma",
""
]
] | Ultracold fermionic atoms in an optical lattice, with a sudden position-dependent change (a quench) in the effective dispersion relation, have been proposed by Rodr\'iguez-Laguna et al. as an analogue spacetime test of the Unruh effect. We provide new support for this analogue by analysing a massless scalar field on a ... |
gr-qc/0602005 | Lorenzo Iorio | Lorenzo Iorio | On the impossibility of measuring the general relativistic part of the
terrestrial acceleration of gravity with superconducting gravimeters | Latex2e, 7 pages, no figures, 1 table, 17 references. Revised
version, to appear in Geophysical Journal International | Geophys.J.Int.167:567-569,2006 | 10.1111/j.1365-246X.2006.03164.x | null | gr-qc astro-ph.EP physics.geo-ph | null | In this paper we very preliminarily investigate the possibility of measuring
the post-Newtonian general relativistic gravitoelectric and gravitomagnetic
components of the acceleration of gravity on the Earth, in continuous regime,
with two absolute measurements at the equator and the south pole with
superconducting g... | [
{
"created": "Wed, 1 Feb 2006 23:03:51 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Apr 2006 14:10:16 GMT",
"version": "v2"
}
] | 2009-05-27 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we very preliminarily investigate the possibility of measuring the post-Newtonian general relativistic gravitoelectric and gravitomagnetic components of the acceleration of gravity on the Earth, in continuous regime, with two absolute measurements at the equator and the south pole with superconducting gra... |
1606.00845 | Arvin Ravanpak | H. Farajollahi, A. Ravanpak, G. F. Fadakar | Cosmological constraints on Agegraphic dark energy in DGP braneworld
gravity | With little modifications in the text with respect to the published
version | Astrophys. Space Sci., 348, 253-259 (2013) | 10.1007/s10509-013-1544-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A proposal to study the original and new agegraphic dark energy in DGP
braneworld cosmology is presented in this work. To verify our model with the
observational data, the model is constrained by a variety of independent
measurements such as Hubble parameter, cosmic microwave background
anisotropies, and baryon acous... | [
{
"created": "Thu, 2 Jun 2016 20:05:57 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2016 12:38:45 GMT",
"version": "v2"
}
] | 2016-06-08 | [
[
"Farajollahi",
"H.",
""
],
[
"Ravanpak",
"A.",
""
],
[
"Fadakar",
"G. F.",
""
]
] | A proposal to study the original and new agegraphic dark energy in DGP braneworld cosmology is presented in this work. To verify our model with the observational data, the model is constrained by a variety of independent measurements such as Hubble parameter, cosmic microwave background anisotropies, and baryon acousti... |
1204.0745 | Lorenzo Iorio | Lorenzo Iorio | Constraints on Galileon-induced precessions from solar system orbital
motions | LaTex2e, 11 pages, 1 table, no figures, 35 references. To appear in
Journal of Cosmology and Astroparticle Physics (JCAP) | JCAP07(2012)001 | 10.1088/1475-7516/2012/07/001 | null | gr-qc astro-ph.EP hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use latest data from solar system planetary orbital motions to put
constraints on some Galileon-induced precessional effects. Due to the
Vainshtein mechanism, the Galileon-type spherically symmetric field of a
monopole induces a small, screened correction proprtional to \sqrt{r} to its
usual r^-1 Newtonian potenti... | [
{
"created": "Tue, 3 Apr 2012 17:43:56 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Apr 2012 14:45:39 GMT",
"version": "v2"
},
{
"created": "Sat, 5 May 2012 13:32:08 GMT",
"version": "v3"
},
{
"created": "Mon, 11 Jun 2012 08:50:13 GMT",
"version": "v4"
}
] | 2012-07-03 | [
[
"Iorio",
"Lorenzo",
""
]
] | We use latest data from solar system planetary orbital motions to put constraints on some Galileon-induced precessional effects. Due to the Vainshtein mechanism, the Galileon-type spherically symmetric field of a monopole induces a small, screened correction proprtional to \sqrt{r} to its usual r^-1 Newtonian potential... |
2208.02677 | Francesco Bajardi | Francesco Bajardi, Rocco D'Agostino | Late-time constraints on modified Gauss-Bonnet cosmology | 11 pages, 3 figures, 1 table. Accepted for publication in General
Relativity and Gravitation | Gen Relativ Gravit 55, 49 (2023) | 10.1007/s10714-023-03092-w | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a gravitational action containing a combination of
the Ricci scalar, $R$, and the topological Gauss--Bonnet term, $G$.
Specifically, we study the cosmological features of a particular class of
modified gravity theories selected by symmetry considerations, namely the
$f(R,G)= R^n G^{1-n}$ mo... | [
{
"created": "Thu, 4 Aug 2022 14:14:07 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 2023 10:18:48 GMT",
"version": "v2"
}
] | 2023-03-15 | [
[
"Bajardi",
"Francesco",
""
],
[
"D'Agostino",
"Rocco",
""
]
] | In this paper, we consider a gravitational action containing a combination of the Ricci scalar, $R$, and the topological Gauss--Bonnet term, $G$. Specifically, we study the cosmological features of a particular class of modified gravity theories selected by symmetry considerations, namely the $f(R,G)= R^n G^{1-n}$ mode... |
1104.0383 | Robert Carroll | Robert Carroll | Remarks on osmosis, quantum mechanics, and gravity | 16 pages | null | 10.1088/1742-6596/361/1/012010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some relations of the quantum potential to Weyl geometry are indicated with
applications to the Friedmann equations for a toy quantum cosmology. Osmotic
velocity and pressure are briefly discussed in terms of quantum mechanics and
superfluids with connections to gravity.
| [
{
"created": "Sun, 3 Apr 2011 14:15:12 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Carroll",
"Robert",
""
]
] | Some relations of the quantum potential to Weyl geometry are indicated with applications to the Friedmann equations for a toy quantum cosmology. Osmotic velocity and pressure are briefly discussed in terms of quantum mechanics and superfluids with connections to gravity. |
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