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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0405100 | J. -F. Pascual-Sanchez | J.-F. Pascual-S\'anchez | Efectos relativistas en los sistemas Galileo, GPS y GLONASS | LaTeX, 12 pages, fully in spanish, Lecture given in ``Scientific Days
250 years of the Spanish Astronomy'', held at Real Observatorio de la Armada,
R.O.A., San Fernando, Cadiz (Spain), 22-26 Sept 2003 | null | null | null | gr-qc physics.space-ph | null | Nowadays, the Global Navigation Satellite Systems (GNSS), working like global
positioning systems, are the GPS (NAVSTAR) and the GLONASS, which only are
operative when several relativistic effects are corrected. In the next years
the Galileo system will be constructed, copying the GPS System if there is no
an alterna... | [
{
"created": "Tue, 18 May 2004 19:26:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pascual-Sánchez",
"J. -F.",
""
]
] | Nowadays, the Global Navigation Satellite Systems (GNSS), working like global positioning systems, are the GPS (NAVSTAR) and the GLONASS, which only are operative when several relativistic effects are corrected. In the next years the Galileo system will be constructed, copying the GPS System if there is no an alternati... |
1505.02093 | Ali \"Ovg\"un | I. Sakalli and A. Ovgun | Tunneling of Vector Particles from Lorentzian Wormholes in 3+1
Dimensions | 4 pages | Eur. Phys. J. Plus (2015) 130: 110 | 10.1140/epjp/i2015-15110-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we consider the Hawking radiation (HR) of vector (massive
spin-1) particles from the traversable Lorentzian wormholes (TLWH) in 3+1
dimensions. We start by providing the Proca equations for the TLWH. Using the
Hamilton-Jacobi (HJ)ans\"{a}tz with the WKB approximation in the quantum
tunneling method, ... | [
{
"created": "Fri, 8 May 2015 16:30:33 GMT",
"version": "v1"
}
] | 2015-06-09 | [
[
"Sakalli",
"I.",
""
],
[
"Ovgun",
"A.",
""
]
] | In this article, we consider the Hawking radiation (HR) of vector (massive spin-1) particles from the traversable Lorentzian wormholes (TLWH) in 3+1 dimensions. We start by providing the Proca equations for the TLWH. Using the Hamilton-Jacobi (HJ)ans\"{a}tz with the WKB approximation in the quantum tunneling method, we... |
gr-qc/0612100 | Patrick Brady | Thomas Baumgarte, Patrick Brady, Jolien D E Creighton, Luis Lehner,
Frans Pretorius, Ricky DeVoe | Learning about compact binary merger: the interplay between numerical
relativity and gravitational-wave astronomy | 19 pages, 12 figures | Phys.Rev.D77:084009,2008 | 10.1103/PhysRevD.77.084009 | null | gr-qc | null | Activities in data analysis and numerical simulation of gravitational waves
have to date largely proceeded independently. In this work we study how
waveforms obtained from numerical simulations could be effectively used within
the data analysis effort to search for gravitational waves from black hole
binaries. We pro... | [
{
"created": "Sat, 16 Dec 2006 18:33:42 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Baumgarte",
"Thomas",
""
],
[
"Brady",
"Patrick",
""
],
[
"Creighton",
"Jolien D E",
""
],
[
"Lehner",
"Luis",
""
],
[
"Pretorius",
"Frans",
""
],
[
"DeVoe",
"Ricky",
""
]
] | Activities in data analysis and numerical simulation of gravitational waves have to date largely proceeded independently. In this work we study how waveforms obtained from numerical simulations could be effectively used within the data analysis effort to search for gravitational waves from black hole binaries. We propo... |
gr-qc/0302095 | Cherubini Christian | C. Cherubini, D. Bini, S. Capozziello, R. Ruffini | Second Order Scalar Invariants of the Riemann Tensor: Applications to
Black Hole Spacetimes | 19 pages, uses ijmpd macros, 8 eps figures | Int.J.Mod.Phys.D11:827-841,2002 | 10.1142/S0218271802002037 | null | gr-qc astro-ph | null | We discuss the Kretschmann, Chern-Pontryagin and Euler invariants among the
second order scalar invariants of the Riemann tensor in any spacetime in the
Newman-Penrose formalism and in the framework of gravitoelectromagnetism, using
the Kerr-Newman geometry as an example. An analogy with electromagnetic
invariants le... | [
{
"created": "Mon, 24 Feb 2003 12:24:10 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Cherubini",
"C.",
""
],
[
"Bini",
"D.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Ruffini",
"R.",
""
]
] | We discuss the Kretschmann, Chern-Pontryagin and Euler invariants among the second order scalar invariants of the Riemann tensor in any spacetime in the Newman-Penrose formalism and in the framework of gravitoelectromagnetism, using the Kerr-Newman geometry as an example. An analogy with electromagnetic invariants lead... |
2308.02470 | Genly Le\'on | Genly Leon (Catolica del Norte U. and DUT, Durban), Alan Coley
(Dalhousie U.), Andronikos Paliathanasis (DUT, Durban and Catolica del Norte
U.), Jonathan Tot (Dalhousie U.), and Balkar Yildirim (Dalhousie U.) | Global dynamics of two models for Quintom
Friedman-Lema\^itre-Robertson-Walker Universes | 71 pages, 18 figures | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comprehensively analyze the dynamics for the gravitational field equations
for the Chiral-Quintom theory in a Friedman-Lema\^itre-Robertson-Walker
cosmology with an additional matter source. We consider a new set of
dimensionless variables and write the field equations in the equivalent form of
an algebraic-differ... | [
{
"created": "Fri, 4 Aug 2023 17:20:00 GMT",
"version": "v1"
}
] | 2023-08-07 | [
[
"Leon",
"Genly",
"",
"Catolica del Norte U. and DUT, Durban"
],
[
"Coley",
"Alan",
"",
"Dalhousie U."
],
[
"Paliathanasis",
"Andronikos",
"",
"DUT, Durban and Catolica del Norte\n U."
],
[
"Tot",
"Jonathan",
"",
"Dalhousie U."
],
[
... | We comprehensively analyze the dynamics for the gravitational field equations for the Chiral-Quintom theory in a Friedman-Lema\^itre-Robertson-Walker cosmology with an additional matter source. We consider a new set of dimensionless variables and write the field equations in the equivalent form of an algebraic-differen... |
2203.01270 | LSC P&P Committee | The LIGO Scientific Collaboration, the Virgo Collaboration, and the
KAGRA Collaboration: R. Abbott, H. Abe, F. Acernese, K. Ackley, N. Adhikari,
R. X. Adhikari, V. K. Adkins, V. B. Adya, C. Affeldt, D. Agarwal, M. Agathos,
K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, T.
Akutsu, S. Albane... | First joint observation by the underground gravitational-wave detector,
KAGRA, with GEO600 | Matches with published version | Progress of Theoretical and Experimental Physics, Volume 2022,
Issue 6, 063F01 (2022) | 10.1093/ptep/ptac073 | LIGO-P2100286 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We report the results of the first joint observation of the KAGRA detector
with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector
consisting of a laser interferometer with three-kilometer arms, and located in
Kamioka, Gifu, Japan. GEO600 is a British--German laser interferometer with 600
m arms... | [
{
"created": "Wed, 2 Mar 2022 17:56:47 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Aug 2022 13:06:42 GMT",
"version": "v2"
}
] | 2022-08-22 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"the KAGRA Collaboration",
"",
""
],
[
"Abbott",
"R.",
""
],
[
"Abe",
"H.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K... | We report the results of the first joint observation of the KAGRA detector with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser interferometer with three-kilometer arms, and located in Kamioka, Gifu, Japan. GEO600 is a British--German laser interferometer with 600 m arms, ... |
1809.09430 | Subhajit Barman | Subhajit Barman and Golam Mortuza Hossain | Consistent derivation of the Hawking effect for both non-extremal and
extremal Kerr black holes | 11 pages, 1 figure, revtex4 | Phys. Rev. D 99, 065010 (2019) | 10.1103/PhysRevD.99.065010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is believed that extremal black holes do not emit Hawking radiation as
understood by taking extremal limits of non-extremal black holes. However, it
is debated whether one can make such conclusion reliably starting from an
extremal black hole, as the associated Bogoliubov coefficients which relate
ingoing and outg... | [
{
"created": "Tue, 25 Sep 2018 12:36:45 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Barman",
"Subhajit",
""
],
[
"Hossain",
"Golam Mortuza",
""
]
] | It is believed that extremal black holes do not emit Hawking radiation as understood by taking extremal limits of non-extremal black holes. However, it is debated whether one can make such conclusion reliably starting from an extremal black hole, as the associated Bogoliubov coefficients which relate ingoing and outgoi... |
gr-qc/0106031 | Dr. Bikash Chandra Paul | B. C. Paul (North Bengal University) | Viscous Cosmologies with Extra Dimensions | 11 latex pages, no figures, accepted in Phys. Rev. D | Phys.Rev.D64:027302,2001 | 10.1103/PhysRevD.64.027302 | null | gr-qc | null | We present an analysis of a n-dimensional vacuum Einstein field equations in
which 4-dimensional space-time which is described by a Friedmann
Robertson-Walker (FRW) metric and that of the extra dimensions by a Kasner type
Euclidean metric. The field equations are interpreted as four dimensional
Einstein equations wit... | [
{
"created": "Fri, 8 Jun 2001 11:48:00 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jun 2001 16:41:13 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Paul",
"B. C.",
"",
"North Bengal University"
]
] | We present an analysis of a n-dimensional vacuum Einstein field equations in which 4-dimensional space-time which is described by a Friedmann Robertson-Walker (FRW) metric and that of the extra dimensions by a Kasner type Euclidean metric. The field equations are interpreted as four dimensional Einstein equations with ... |
1606.04644 | Elizabeth Winstanley | Supakchai Ponglertsakul and Elizabeth Winstanley | Solitons and hairy black holes in Einstein-non-Abelian-Proca theory in
anti-de Sitter space-time | 23 pages, 16 figures, typos corrected, version accepted for
publication in Physical Review D | Phys. Rev. D 94, 044048 (2016) | 10.1103/PhysRevD.94.044048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new soliton and hairy black hole solutions of
Einstein-non-Abelian-Proca theory in asymptotically anti-de Sitter space-time
with gauge group ${\mathfrak {su}}(2)$. For static, spherically symmetric
configurations, we show that the gauge field must be purely magnetic, and solve
the resulting field equations... | [
{
"created": "Wed, 15 Jun 2016 05:12:56 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Aug 2016 15:44:30 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We present new soliton and hairy black hole solutions of Einstein-non-Abelian-Proca theory in asymptotically anti-de Sitter space-time with gauge group ${\mathfrak {su}}(2)$. For static, spherically symmetric configurations, we show that the gauge field must be purely magnetic, and solve the resulting field equations n... |
0806.0464 | Oyvind Gron | {\O}yvind Gr{\o}n and Sigurd Kirkevold N{\ae}ss | An electromagnetic perpetuum mobile? | 9 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A charge moving freely in orbit around the Earth radiates according to
Larmor's formula. If the path is closed, it would constitute a perpetuum
mobile. The solution to this energy paradox is found in an article by C. M.
DeWitt and B. DeWitt from 1964. The main point is that the equation of motion
of a radiating charg... | [
{
"created": "Tue, 3 Jun 2008 08:39:17 GMT",
"version": "v1"
}
] | 2009-09-29 | [
[
"Grøn",
"Øyvind",
""
],
[
"Næss",
"Sigurd Kirkevold",
""
]
] | A charge moving freely in orbit around the Earth radiates according to Larmor's formula. If the path is closed, it would constitute a perpetuum mobile. The solution to this energy paradox is found in an article by C. M. DeWitt and B. DeWitt from 1964. The main point is that the equation of motion of a radiating charge ... |
1505.03415 | Gabriel G. Carvalho Mr | Eduardo Bittencourt, Iarley P. Lobo, Gabriel G. Carvalho | On the disformal invariance of the Dirac equation | 12 pages; This matches the version to be published in CQG | null | 10.1088/0264-9381/32/18/185016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we analyze the invariance of the Dirac equation under disformal
transformations depending on the propagating spinor field. Using the
Weyl-Cartan formalism, we construct a large class of disformal maps between
different metric tensors, respecting the order of differentiability of the
Dirac operator and s... | [
{
"created": "Wed, 13 May 2015 15:00:01 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Aug 2015 20:44:06 GMT",
"version": "v2"
}
] | 2015-09-23 | [
[
"Bittencourt",
"Eduardo",
""
],
[
"Lobo",
"Iarley P.",
""
],
[
"Carvalho",
"Gabriel G.",
""
]
] | In this paper we analyze the invariance of the Dirac equation under disformal transformations depending on the propagating spinor field. Using the Weyl-Cartan formalism, we construct a large class of disformal maps between different metric tensors, respecting the order of differentiability of the Dirac operator and sat... |
2103.00802 | Andronikos Paliathanasis | Andronikos Paliathanasis | Quantum potentiality in Inhomogeneous Cosmology | 13 pages, 1 figure | Universe 2021, 7(3), 52 | 10.3390/universe7030052 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | For the Szekeres system which describes inhomogeneous and anisotropic
spacetimes we make use of a point-like Lagrangian, which describes the
evolution of the physical variables of the Szekeres model, in order to perform
a canonical quantization and to study the quantum potentiality of the Szekeres
system in the conte... | [
{
"created": "Mon, 1 Mar 2021 06:49:43 GMT",
"version": "v1"
}
] | 2021-03-02 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | For the Szekeres system which describes inhomogeneous and anisotropic spacetimes we make use of a point-like Lagrangian, which describes the evolution of the physical variables of the Szekeres model, in order to perform a canonical quantization and to study the quantum potentiality of the Szekeres system in the content... |
1910.07520 | Juho Lankinen | Juho Lankinen, Oskari Kerppo and Iiro Vilja | Reheating via gravitational particle production in kination epoch | 14 pages, 2 figures | Phys. Rev. D 101, 063529 (2020) | 10.1103/PhysRevD.101.063529 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a detailed study of reheating in the kination regime where
particle content is created by gravitational production of massive scalars
mutually interacting with a massless scalar field. The produced particles
subsequently decay into massless particles eventually reheating the Universe.
We aim for a more pre... | [
{
"created": "Wed, 16 Oct 2019 10:30:39 GMT",
"version": "v1"
}
] | 2020-03-27 | [
[
"Lankinen",
"Juho",
""
],
[
"Kerppo",
"Oskari",
""
],
[
"Vilja",
"Iiro",
""
]
] | We provide a detailed study of reheating in the kination regime where particle content is created by gravitational production of massive scalars mutually interacting with a massless scalar field. The produced particles subsequently decay into massless particles eventually reheating the Universe. We aim for a more preci... |
1408.0633 | Chandra Prakash Singh | C.P.Singh and Vijay Singh | Friedmann cosmology with particle creation in modified $f(R,T)$ gravity | 19 pages, 8 figures, title changed, typo errors removed, one section
has been modified | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theoretical and observational consequences of thermodynamics of open
systems, which allow particle creation are investigated in modified $f(R,T)$
($R$ is the Ricci scalar and $T$ is the trace of energy-momentum tensor) theory
of gravity within the framework of a flat Friedmann-Robertson-Walker line
element. A sim... | [
{
"created": "Mon, 4 Aug 2014 10:25:38 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Aug 2014 09:55:16 GMT",
"version": "v2"
}
] | 2014-08-26 | [
[
"Singh",
"C. P.",
""
],
[
"Singh",
"Vijay",
""
]
] | The theoretical and observational consequences of thermodynamics of open systems, which allow particle creation are investigated in modified $f(R,T)$ ($R$ is the Ricci scalar and $T$ is the trace of energy-momentum tensor) theory of gravity within the framework of a flat Friedmann-Robertson-Walker line element. A simpl... |
0903.4651 | Morgan Le Delliou | Morgan Le Delliou (IFT, CFTC), Jos\'e Pedro Mimoso (CFTC) | Separating expansion from contraction and generalizing TOV condition in
spherically symmetric models with pressure | 4pp, 1fig, AIP Conference: Proc. XXXI Spanish Relat. Meeting, ERE08,
Salamanca, Spain, 15-19 Sept., 2008 Septembre, Salamanca, Espagne | AIP Conf.Proc.1122:316-319,2009 | 10.1063/1.3141309 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate spherically symmetric solutions with pressure and discuss the
existence of a dividing shell separating expanding and collapsing regions. We
perform a 3+1 splitting and obtain gauge invariant conditions relating not only
the intrinsic spatial curvature of the shells to the ADM mass, but also a
function ... | [
{
"created": "Thu, 26 Mar 2009 17:31:32 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Delliou",
"Morgan Le",
"",
"IFT, CFTC"
],
[
"Mimoso",
"José Pedro",
"",
"CFTC"
]
] | We investigate spherically symmetric solutions with pressure and discuss the existence of a dividing shell separating expanding and collapsing regions. We perform a 3+1 splitting and obtain gauge invariant conditions relating not only the intrinsic spatial curvature of the shells to the ADM mass, but also a function of... |
2002.00398 | Metin Gurses | Metin Gurses, Yaghoub Heydarzade and Bayram Tekin | Superposition of FLRW Universes | 13 pages, 4 figures, minor changes | Journal of Cosmology and Astroparticle Physics (JCAP), Vol.2020,
No.6, 060 (2020) | 10.1088/1475-7516/2020/06/060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that (1) the Einstein field equations with a perfect fluid source
admit a nonlinear superposition of two distinct homogenous
Friedman-Lemaitre-Robertson-Walker (FLRW) metrics as a solution, (2) the
superposed solution is an inhomogeneous geometry in general, (3) it reduces to
a homogeneous one in the two asym... | [
{
"created": "Sun, 2 Feb 2020 14:14:13 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Apr 2020 22:30:52 GMT",
"version": "v2"
},
{
"created": "Tue, 26 May 2020 18:01:07 GMT",
"version": "v3"
}
] | 2020-12-09 | [
[
"Gurses",
"Metin",
""
],
[
"Heydarzade",
"Yaghoub",
""
],
[
"Tekin",
"Bayram",
""
]
] | We show that (1) the Einstein field equations with a perfect fluid source admit a nonlinear superposition of two distinct homogenous Friedman-Lemaitre-Robertson-Walker (FLRW) metrics as a solution, (2) the superposed solution is an inhomogeneous geometry in general, (3) it reduces to a homogeneous one in the two asympt... |
1107.5081 | Theodore A. Jacobson | Ted Jacobson | Where is the extremal Kerr ISCO? | 6 pages; v2: minor cosmetic changes; coincides with published version | null | 10.1088/0264-9381/28/18/187001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although the circular photon orbit and ISCO for the Kerr black hole remain
distinct from each other and from the horizon in the extremal spin limit on a
constant Boyer-Lindquist time slice, on a horizon-crossing slice they both
coincide with the null generators of the horizon.
| [
{
"created": "Mon, 25 Jul 2011 21:47:47 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jan 2012 00:35:09 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Jacobson",
"Ted",
""
]
] | Although the circular photon orbit and ISCO for the Kerr black hole remain distinct from each other and from the horizon in the extremal spin limit on a constant Boyer-Lindquist time slice, on a horizon-crossing slice they both coincide with the null generators of the horizon. |
2206.00198 | Brett McInnes | Brett McInnes | The Special Role of Toroidal Black Holes in Holography | Various corrections and clarifications. Version to appear in Nuclear
Physics B. 14 pages, no figures | null | 10.1016/j.nuclphysb.2023.116126 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the standard holographic ``dictionary'', the deep infrared of the strongly
coupled boundary field theory is studied by examining the bulk region near to
the event horizon of a simple AdS-Reissner-Nordstr\"{o}m black hole, near to
extremality. Recently Horowitz et al. have argued that this is not correct,
\emph{exc... | [
{
"created": "Wed, 1 Jun 2022 02:51:42 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Dec 2022 00:15:13 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Feb 2023 06:04:37 GMT",
"version": "v3"
}
] | 2023-03-22 | [
[
"McInnes",
"Brett",
""
]
] | In the standard holographic ``dictionary'', the deep infrared of the strongly coupled boundary field theory is studied by examining the bulk region near to the event horizon of a simple AdS-Reissner-Nordstr\"{o}m black hole, near to extremality. Recently Horowitz et al. have argued that this is not correct, \emph{excep... |
0910.4816 | L. C. Garcia de Andrade | Garcia de Andrade | Slow dynamos in Lorentz tori Anti-de Sitter spacetime embedded in
Riemann 2D-space | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Earlier Chicone, Latushkin and Montgomery-Smith [Comm Math Phys (1997)] have
shown that a fast dynamo in compact two-dimensional manifold can be supported
as long as its Riemannian curvature be negative. Recently Klebanov and
Maldacena [Phys Today (2008)] showed that a similar flat spacetime embedding of
a 2D negativ... | [
{
"created": "Mon, 26 Oct 2009 07:22:54 GMT",
"version": "v1"
}
] | 2009-10-27 | [
[
"de Andrade",
"Garcia",
""
]
] | Earlier Chicone, Latushkin and Montgomery-Smith [Comm Math Phys (1997)] have shown that a fast dynamo in compact two-dimensional manifold can be supported as long as its Riemannian curvature be negative. Recently Klebanov and Maldacena [Phys Today (2008)] showed that a similar flat spacetime embedding of a 2D negative ... |
1509.08196 | Seema Satin | Seema Satin | Classical Einstein-Langevin Equation and Proposed Applications | null | general Relativity and Gravitation (2018) 50:97 | 10.1007/s10714-018-2418-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to formulate a theory for Classical Stochastic Gravity for certain
applications in Astrophysics and Cosmology.This involves the Langevin approach
in curved spacetime, which is introduced here, in the form of a classical
Einstein-Langevin equation.The domain of applications of such an approach and
possible ... | [
{
"created": "Mon, 28 Sep 2015 04:51:12 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Feb 2016 08:00:37 GMT",
"version": "v2"
},
{
"created": "Sat, 31 Dec 2016 06:55:50 GMT",
"version": "v3"
},
{
"created": "Thu, 13 Jul 2017 08:17:24 GMT",
"version": "v4"
},
{
"cr... | 2018-08-01 | [
[
"Satin",
"Seema",
""
]
] | We propose to formulate a theory for Classical Stochastic Gravity for certain applications in Astrophysics and Cosmology.This involves the Langevin approach in curved spacetime, which is introduced here, in the form of a classical Einstein-Langevin equation.The domain of applications of such an approach and possible ou... |
2009.09722 | Ke Wang | Ke Wang | Parameterized tests of general relativity with gravitational wave
generation and propagation | 7 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Any modification on gravity would affect not only gravitational wave (GW)
generation but also GW propagation. Therefore, tests of general relativity (GR)
with only GW generation or GW propagation will lead to an overestimate for
deviations. Here we try to use one set of parameters to parameterize the
modifications on... | [
{
"created": "Mon, 21 Sep 2020 09:52:22 GMT",
"version": "v1"
}
] | 2020-09-22 | [
[
"Wang",
"Ke",
""
]
] | Any modification on gravity would affect not only gravitational wave (GW) generation but also GW propagation. Therefore, tests of general relativity (GR) with only GW generation or GW propagation will lead to an overestimate for deviations. Here we try to use one set of parameters to parameterize the modifications on b... |
1203.4000 | Yuri Pavlov | Yu. V. Pavlov | On the possibility of observation of the future for movement in the
field of black holes of different types | 9 pages, 2 figures; published version | Gen. Relativ. Gravit. 45 (2013) 17-25 | 10.1007/s10714-012-1453-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown for a spherically symmetric black hole of general type that it is
impossible to observe the infinite future of the Universe external to the hole
during the finite proper time interval of the free fall. Quantitative
evaluations of the effect of time dilatation for circular orbits around the
Kerr black hole... | [
{
"created": "Sun, 18 Mar 2012 21:39:03 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jan 2013 12:46:29 GMT",
"version": "v2"
}
] | 2013-01-08 | [
[
"Pavlov",
"Yu. V.",
""
]
] | It is shown for a spherically symmetric black hole of general type that it is impossible to observe the infinite future of the Universe external to the hole during the finite proper time interval of the free fall. Quantitative evaluations of the effect of time dilatation for circular orbits around the Kerr black hole a... |
1301.4322 | Jacob D. Bekenstein | Jacob D. Bekenstein | Can quantum gravity be exposed in the laboratory?: A tabletop experiment
to reveal the quantum foam | Keynote lecture at the international workshop "Horizon of quantum
physics: from foundations to quantum enabled technologies", Taipei, October
16, 2012. 10 pages, LaTeX, one jpg figure. To appear in the proceedings
edited by F. Scardigli in Foundations of Physics | Found. Phys. 44, 452-462 (2014) | 10.1007/s10701-014-9779-z | null | gr-qc astro-ph.HE hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I propose an experiment that may be performed, with present low temperature
and cryogenic technology, to reveal Wheeler's quantum foam. It involves
coupling an optical photon's momentum to the center of mass motion of a
macroscopic transparent block with parameters such that the latter is displaced
in space by approx... | [
{
"created": "Fri, 18 Jan 2013 08:56:53 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 2014 12:11:05 GMT",
"version": "v2"
}
] | 2014-05-30 | [
[
"Bekenstein",
"Jacob D.",
""
]
] | I propose an experiment that may be performed, with present low temperature and cryogenic technology, to reveal Wheeler's quantum foam. It involves coupling an optical photon's momentum to the center of mass motion of a macroscopic transparent block with parameters such that the latter is displaced in space by approxim... |
gr-qc/0212102 | Michael B. Mensky | Michael B. Mensky (P.N. Lebedev Physics Institute, Moscow) | Path Group in gauge theory and gravity | 15 pages LATEX, 5 figures. Reported at the XXIV International
Colloquium on Group Theoretical Methods in Physics(ICGTMP-2002 or Group 24),
Paris, July 15-20, 2002 | null | null | null | gr-qc hep-th | null | Applications of the Path Group (consisting of classes of continuous curves in
Minkowski space-time) to gauge theory and gravity are reviewed. Covariant
derivatives are interpreted as generators of an induced representation of Path
Group. Non-Abelian generalization of Stokes theorem is naturally formulated and
proved ... | [
{
"created": "Wed, 25 Dec 2002 11:49:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mensky",
"Michael B.",
"",
"P.N. Lebedev Physics Institute, Moscow"
]
] | Applications of the Path Group (consisting of classes of continuous curves in Minkowski space-time) to gauge theory and gravity are reviewed. Covariant derivatives are interpreted as generators of an induced representation of Path Group. Non-Abelian generalization of Stokes theorem is naturally formulated and proved in... |
gr-qc/9607071 | Robert Mann | R.B. Mann | Pair Production of Topological anti de Sitter Black Holes | 4 pages, uses latex | Class.Quant.Grav.14:L109-L114,1997 | 10.1088/0264-9381/14/5/007 | WATPHYS-TH96/10 | gr-qc | null | The pair creation of black holes with event horizons of non-trivial topology
is described. The spacetimes are all limiting cases of the cosmological $C$
metric. They are generalizations of the $(2+1)$ dimensional black hole and have
asymptotically anti de Sitter behaviour. Domain walls instantons can mediate
their pa... | [
{
"created": "Sun, 28 Jul 1996 20:49:15 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Mann",
"R. B.",
""
]
] | The pair creation of black holes with event horizons of non-trivial topology is described. The spacetimes are all limiting cases of the cosmological $C$ metric. They are generalizations of the $(2+1)$ dimensional black hole and have asymptotically anti de Sitter behaviour. Domain walls instantons can mediate their pair... |
1501.07044 | Matt Visser | Petarpa Boonserm (Chulalongkorn University), Tritos Ngampitipan
(Chulalongkorn University), and Matt Visser (Victoria University of
Wellington) | Modelling anisotropic fluid spheres in general relativity | V1: 6 pages; V2: now 7 pages; 7 references added; no physics changes;
V3: Revised and reformatted; now 15 pages in World Scientific style. Some
extra discussion added. 5 more references added. This version accepted for
publication in IJMPD | Int.J.Mod.Phys. D25 # 2 (2015) 1650019 | 10.1142/S021827181650019X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that an arbitrary general relativistic static anisotropic fluid
sphere, (static and spherically symmetric but with transverse pressure not
equal to radial pressure), can nevertheless be successfully mimicked by
suitable linear combinations of theoretically attractive and quite simple
classical matter: a clas... | [
{
"created": "Wed, 28 Jan 2015 09:37:19 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Feb 2015 21:24:09 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Sep 2015 23:20:22 GMT",
"version": "v3"
}
] | 2017-11-29 | [
[
"Boonserm",
"Petarpa",
"",
"Chulalongkorn University"
],
[
"Ngampitipan",
"Tritos",
"",
"Chulalongkorn University"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | We argue that an arbitrary general relativistic static anisotropic fluid sphere, (static and spherically symmetric but with transverse pressure not equal to radial pressure), can nevertheless be successfully mimicked by suitable linear combinations of theoretically attractive and quite simple classical matter: a classi... |
gr-qc/0410048 | Marcello Ortaggio | Marcello Ortaggio | Higher dimensional black holes in external magnetic fields | 1+22 pages, 1 figure. v2: added Appendix B (on magnetized static
rings), one new reference, minor changes in the text. v3: discussion on
static rings extended and incorporated into the main text, transformation to
the coordinates of Ref. [42] (for extremal static rings) presented in new
Appendix B, two new refe... | JHEP0505:048,2005 | 10.1088/1126-6708/2005/05/048 | null | gr-qc hep-th | null | We apply a Harrison transformation to higher dimensional asymptotically flat
black hole solutions, which puts them into an external magnetic field. First,
we magnetize the Schwarzschild-Tangherlini metric in arbitrary spacetime
dimension n>=4. The thus generated exact solution of the Einstein-Maxwell
equations descri... | [
{
"created": "Mon, 11 Oct 2004 15:34:26 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Nov 2004 15:19:34 GMT",
"version": "v2"
},
{
"created": "Tue, 3 May 2005 08:31:02 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Ortaggio",
"Marcello",
""
]
] | We apply a Harrison transformation to higher dimensional asymptotically flat black hole solutions, which puts them into an external magnetic field. First, we magnetize the Schwarzschild-Tangherlini metric in arbitrary spacetime dimension n>=4. The thus generated exact solution of the Einstein-Maxwell equations describe... |
2310.17081 | Adailton Ara\'ujo Filho | A. A. Ara\'ujo Filho, Kimet Jusufi, B. Cuadros-Melgar, Genly Leon | Dark matter signatures of black holes with Yukawa potential | 24 pages in double column, 13 figures and 5 tables | Physics of the Dark Universe 44 (2024) 101500 | 10.1016/j.dark.2024.101500 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study uses a nonsingular Yukawa--modified potential to obtain a static
and spherically symmetric black hole solution with a cosmological constant.
Such Yukawa--like corrections are encoded in two parameters, $\alpha$ and
$\lambda$, that modify Newton's law of gravity in large distances, and a
deformation paramet... | [
{
"created": "Thu, 26 Oct 2023 00:49:41 GMT",
"version": "v1"
},
{
"created": "Sun, 5 May 2024 14:27:00 GMT",
"version": "v2"
}
] | 2024-05-07 | [
[
"Filho",
"A. A. Araújo",
""
],
[
"Jusufi",
"Kimet",
""
],
[
"Cuadros-Melgar",
"B.",
""
],
[
"Leon",
"Genly",
""
]
] | This study uses a nonsingular Yukawa--modified potential to obtain a static and spherically symmetric black hole solution with a cosmological constant. Such Yukawa--like corrections are encoded in two parameters, $\alpha$ and $\lambda$, that modify Newton's law of gravity in large distances, and a deformation parameter... |
2311.00563 | Daisuke Miki | Daisuke Miki, Akira Matsumura, Kazuhiro Yamamoto | Quantum signature of gravity in optomechanical systems with conditional
measurement | 13 pages, 5 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quantum signature of gravity in optomechanical systems
under quantum control. We analyze the gravity-induced entanglement and
squeezing in mechanical mirrors in a steady state. The behaviors and the
conditions for generating the gravity-induced entanglement and squeezing are
identified in the Fouri... | [
{
"created": "Wed, 1 Nov 2023 15:00:01 GMT",
"version": "v1"
}
] | 2023-11-02 | [
[
"Miki",
"Daisuke",
""
],
[
"Matsumura",
"Akira",
""
],
[
"Yamamoto",
"Kazuhiro",
""
]
] | We investigate the quantum signature of gravity in optomechanical systems under quantum control. We analyze the gravity-induced entanglement and squeezing in mechanical mirrors in a steady state. The behaviors and the conditions for generating the gravity-induced entanglement and squeezing are identified in the Fourier... |
1210.0893 | Tyson Littenberg | Tyson B. Littenberg, John G. Baker, Alessandra Buonanno, Bernard J.
Kelly | Systematic biases in parameter estimation of binary black-hole mergers | 16 Pages, 7 figures | null | 10.1103/PhysRevD.87.104003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Parameter estimation of binary-black-hole merger events in gravitational-wave
data relies on matched-filtering techniques, which, in turn, depend on accurate
model waveforms. Here we characterize the systematic biases introduced in
measuring astrophysical parameters of binary black holes by applying the
currently mos... | [
{
"created": "Tue, 2 Oct 2012 19:47:23 GMT",
"version": "v1"
}
] | 2013-05-08 | [
[
"Littenberg",
"Tyson B.",
""
],
[
"Baker",
"John G.",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Kelly",
"Bernard J.",
""
]
] | Parameter estimation of binary-black-hole merger events in gravitational-wave data relies on matched-filtering techniques, which, in turn, depend on accurate model waveforms. Here we characterize the systematic biases introduced in measuring astrophysical parameters of binary black holes by applying the currently most ... |
1905.04296 | Dimitris Christodoulou | Dimitris M. Christodoulou and Demosthenes Kazanas | Universal expansion with spatially varying $G$ | Submitted to MNRASL. Matching the version considered for publication | null | 10.1093/mnrasl/slz074 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the expansion of the universe under the assumptions that $G$
varies in space and the radial size $r$ of the universe is very large (we call
this the MOND regime of varying-$G$ gravity). The inferred asymptotic behavior
turns out to be different than that found by McCrea & Milne in 1934 and our
equations ... | [
{
"created": "Fri, 10 May 2019 05:04:50 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2019 02:37:00 GMT",
"version": "v2"
},
{
"created": "Fri, 17 May 2019 01:02:30 GMT",
"version": "v3"
}
] | 2019-05-29 | [
[
"Christodoulou",
"Dimitris M.",
""
],
[
"Kazanas",
"Demosthenes",
""
]
] | We calculate the expansion of the universe under the assumptions that $G$ varies in space and the radial size $r$ of the universe is very large (we call this the MOND regime of varying-$G$ gravity). The inferred asymptotic behavior turns out to be different than that found by McCrea & Milne in 1934 and our equations be... |
gr-qc/0606118 | Raymond Chiao Y. | R. Y. Chiao | Proposed observations of gravity waves from the early Universe via
"Millikan oil drops" | 10 pages, 2 figures, NASA "Quantum-to-Cosmos" conference proceedings
to be published in IJMPD | Int.J.Mod.Phys.D16:2309-2318,2008 | 10.1142/S0218271807011279 | null | gr-qc astro-ph quant-ph | null | Pairs of Planck-mass drops of superfluid helium coated by electrons (i.e.,
``Millikan oil drops''), when levitated in a superconducting magnetic trap, can
be efficient quantum transducers between electromagnetic (EM) and gravitational
(GR) radiation. This leads to the possibility of a Hertz-like experiment, in
which ... | [
{
"created": "Wed, 28 Jun 2006 17:41:47 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 2006 21:16:12 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Chiao",
"R. Y.",
""
]
] | Pairs of Planck-mass drops of superfluid helium coated by electrons (i.e., ``Millikan oil drops''), when levitated in a superconducting magnetic trap, can be efficient quantum transducers between electromagnetic (EM) and gravitational (GR) radiation. This leads to the possibility of a Hertz-like experiment, in which EM... |
1905.04372 | Sebasti\'an Bahamonde | Sebastian Bahamonde, Mir Faizal | Is Gravity Actually the Curvature of Spacetime? | Essay received an honorable mention in the Gravity Research
Foundation Essay Competition 2019. 7 pages | Int. J. Mod. Phys. D Vol. 28, 1944021, 2019 | 10.1142/S0218271819440218 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein equations, apart from being the classical field equations of
General Relativity, are also the classical field equations of two other
theories of gravity. As the experimental tests of General Relativity are done
using the Einstein equations, we do not really know, if gravity is the
curvature of a torsionl... | [
{
"created": "Fri, 10 May 2019 20:29:55 GMT",
"version": "v1"
}
] | 2019-11-12 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Faizal",
"Mir",
""
]
] | The Einstein equations, apart from being the classical field equations of General Relativity, are also the classical field equations of two other theories of gravity. As the experimental tests of General Relativity are done using the Einstein equations, we do not really know, if gravity is the curvature of a torsionles... |
gr-qc/0701012 | Homer G. Ellis | Homer G. Ellis | Cosmology without Einstein's assumption that inertial mass produces
gravity | v4: Essential revision and major extension, new title; v5:
introduction, two references, and table of contents added; v6: further
discussion of issues, improved fitting of model to SNe Ia data marginally
favors closed universe aged 12.52 Gyr; v7: 35 pages, improved clarity, new
material and references; v8: much... | International Journal of Modern Physics D, Vol. 24, No. 8 (2015),
1550069 | 10.1142/S0218271815500698 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Giving up Einstein's assumption, implicit in his 1916 field equations, that
inertial mass, even in its appearance as energy, is equivalent to active
gravitational mass and therefore is a source of gravity allows revising the
field equations to a form in which a positive cosmological constant is seen to
(mis)represent... | [
{
"created": "Sun, 31 Dec 2006 23:41:24 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Apr 2007 00:03:54 GMT",
"version": "v2"
},
{
"created": "Wed, 30 May 2007 11:59:48 GMT",
"version": "v3"
},
{
"created": "Mon, 1 Feb 2010 21:59:49 GMT",
"version": "v4"
},
{
"cr... | 2016-03-18 | [
[
"Ellis",
"Homer G.",
""
]
] | Giving up Einstein's assumption, implicit in his 1916 field equations, that inertial mass, even in its appearance as energy, is equivalent to active gravitational mass and therefore is a source of gravity allows revising the field equations to a form in which a positive cosmological constant is seen to (mis)represent a... |
1706.05619 | Yurii Ignat'ev | Yu.G. Ignat'ev, A.A. Agathonov | Qualitative and Numerical Analysis of the Cosmological Model Based on a
Phantom Scalar field with Self-Action. II. Comparative Analysis of Models of
Classical and Phantom Fields | 19 pages, 34 figures, 35 references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On the basis of the qualitative analysis and numerical simulation of
cosmological models with classical and phantom scalar fields with self-action
there have been revealed and refined such models' distinctive features and
potential possibilities for their usage as basic models in cosmology.
| [
{
"created": "Sun, 18 Jun 2017 08:31:21 GMT",
"version": "v1"
}
] | 2017-06-20 | [
[
"Ignat'ev",
"Yu. G.",
""
],
[
"Agathonov",
"A. A.",
""
]
] | On the basis of the qualitative analysis and numerical simulation of cosmological models with classical and phantom scalar fields with self-action there have been revealed and refined such models' distinctive features and potential possibilities for their usage as basic models in cosmology. |
gr-qc/0111036 | Yakov Itin | Yakov Itin | Energy-momentum current for coframe gravity | 20 pages, to appear in Class.Quant.Grav | Class.Quant.Grav. 19 (2002) 173-190 | 10.1088/0264-9381/19/1/311 | null | gr-qc | null | The obstruction for the existence of an energy momentum tensor for the
gravitational field is connected with differential-geometric features of the
Riemannian manifold. It has not to be valid for alternative geometrical
structures. A teleparallel manifold is defined as a parallelizable
differentiable 4D-manifold endo... | [
{
"created": "Tue, 13 Nov 2001 14:46:57 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Itin",
"Yakov",
""
]
] | The obstruction for the existence of an energy momentum tensor for the gravitational field is connected with differential-geometric features of the Riemannian manifold. It has not to be valid for alternative geometrical structures. A teleparallel manifold is defined as a parallelizable differentiable 4D-manifold endowe... |
gr-qc/0003020 | Ralf Schuetzhold | Ralf Sch\"utzhold | On the Particle Definition in the presence of Black Holes | 44 pages, LaTeX, no figures, accepted for publication in Phys. Rev. D | Phys.Rev. D63 (2001) 024014 | 10.1103/PhysRevD.63.024014 | null | gr-qc | null | A canonical particle definition via the diagonalisation of the Hamiltonian
for a quantum field theory in specific curved space-times is presented. Within
the provided approach radial ingoing or outgoing Minkowski particles do not
exist. An application of this formalism to the Rindler metric recovers the
well-known Un... | [
{
"created": "Tue, 7 Mar 2000 14:11:28 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2000 12:09:35 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Oct 2000 14:33:05 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Schützhold",
"Ralf",
""
]
] | A canonical particle definition via the diagonalisation of the Hamiltonian for a quantum field theory in specific curved space-times is presented. Within the provided approach radial ingoing or outgoing Minkowski particles do not exist. An application of this formalism to the Rindler metric recovers the well-known Unru... |
0708.4143 | Shahram Jalalzadeh | P. Pedram, S. Jalalzadeh and S. S. Gousheh | Stephani-Schutz quantum cosmology | 6 pages, 4 figures, 1 table, to appear in PLB | Phys.Lett.B655:91-96,2007 | 10.1016/j.physletb.2007.08.077 | null | gr-qc | null | We study the Stephani quantum cosmological model in the presence of a
cosmological constant in radiation dominated Universe. In the present work the
Schutz's variational formalism which recovers the notion of time is applied.
This gives rise to Wheeler-DeWitt equations which can be cast in the form of
Schr\"odinger e... | [
{
"created": "Thu, 30 Aug 2007 12:48:24 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pedram",
"P.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Gousheh",
"S. S.",
""
]
] | We study the Stephani quantum cosmological model in the presence of a cosmological constant in radiation dominated Universe. In the present work the Schutz's variational formalism which recovers the notion of time is applied. This gives rise to Wheeler-DeWitt equations which can be cast in the form of Schr\"odinger equ... |
1402.6661 | Mohammad Sami | Md. Wali Hossain, R. Myrzakulov, M. Sami, Emmanuel N. Saridakis | Variable gravity: A suitable framework for quintessential inflation | 21 Latex pages, 13 figures and one table, minor clarifications added,
typos corrected and references updated. To appear in PRD | Phys. Rev. D 90, 023512 (2014) | 10.1103/PhysRevD.90.023512 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate a scenario of variable gravity and apply it to
the unified description of inflation and late time cosmic acceleration dubbed
quintessential inflation. The scalar field called "cosmon" which in this model
unifies both the concepts reduces to inflaton at early epochs. We calculate the
slow... | [
{
"created": "Tue, 25 Feb 2014 11:45:06 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jun 2014 10:09:51 GMT",
"version": "v2"
}
] | 2014-07-14 | [
[
"Hossain",
"Md. Wali",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Sami",
"M.",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | In this paper, we investigate a scenario of variable gravity and apply it to the unified description of inflation and late time cosmic acceleration dubbed quintessential inflation. The scalar field called "cosmon" which in this model unifies both the concepts reduces to inflaton at early epochs. We calculate the slow-r... |
1208.6485 | Molin Liu | Molin Liu, Xuehui Hu, Junwang Lu and Jianbo Lu | Spectrums of Black Hole in de Sitter Spacetime with Highly Damped
Quasinormal Modes: High Overtone Case | 12 pages, 2 firures, published version | Mod. Phys. Lett. A 27(2012)1250123 | 10.1142/S0217732312501234 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent physical interpretation on quasinormal modes presented by
Maggiore, the adiabatic quantity method given by Kunstatter is used to
calculate the spectrums of a non-extremal Schwarzschild de Sitter black hole in
this paper, as well as electrically charged case. According to highly damped
Konoplya and... | [
{
"created": "Fri, 31 Aug 2012 13:02:00 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Liu",
"Molin",
""
],
[
"Hu",
"Xuehui",
""
],
[
"Lu",
"Junwang",
""
],
[
"Lu",
"Jianbo",
""
]
] | Motivated by recent physical interpretation on quasinormal modes presented by Maggiore, the adiabatic quantity method given by Kunstatter is used to calculate the spectrums of a non-extremal Schwarzschild de Sitter black hole in this paper, as well as electrically charged case. According to highly damped Konoplya and Z... |
gr-qc/9708043 | Bruce Bassett | Nazeem Mustapha, B.A. Bassett, Charles Hellaby and G.F.R. Ellis
(University of Cape Town) | Shrinking II -- The Distortion of the Area Distance-Redshift Relation in
Inhomogeneous Isotropic Universes | Minor technical refinement, 16 pages, RevTex, 8 eps figures | Class.Quant.Grav. 15 (1998) 2363-2379 | 10.1088/0264-9381/15/8/016 | mth.uct.ac.za-9708 | gr-qc astro-ph | null | This paper and the others in the series challenge the standard model of the
effects of gravitational lensing on observations at large distances. We show
that due to the cumulative effect of lensing, areas corresponding to an
observed solid angle can be quite different than would be estimated from the
corresponding Fr... | [
{
"created": "Tue, 19 Aug 1997 16:09:13 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Sep 1997 12:55:30 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Mustapha",
"Nazeem",
"",
"University of Cape Town"
],
[
"Bassett",
"B. A.",
"",
"University of Cape Town"
],
[
"Hellaby",
"Charles",
"",
"University of Cape Town"
],
[
"Ellis",
"G. F. R.",
"",
"University of Cape Town"
]
] | This paper and the others in the series challenge the standard model of the effects of gravitational lensing on observations at large distances. We show that due to the cumulative effect of lensing, areas corresponding to an observed solid angle can be quite different than would be estimated from the corresponding Frie... |
2404.11632 | Dr. Goutam Manna | Arijit Panda, Debashis Gangopadhyay and Goutam Manna | Form Invariance of Raychaudhuri equation in the presence of
Inflaton-type fields | 6 pages | Fortschritte der Physik, 2024 | 10.1002/prop.202400134 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We show that the Raychaudhuri equation remains form invariant for certain
solutions of scalar fields $\phi$ whose Lagrangian is non-canonical and of the
form $\mathcal{L}(X,\phi)=-V(\phi)F(X)$, with $X=\frac{1}{2} g_{\mu\nu}
\nabla^{\mu}\phi \nabla^{\nu} \phi$ and $V(\phi)$ the potential. Solutions
exist for both hom... | [
{
"created": "Wed, 17 Apr 2024 09:32:23 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jul 2024 23:41:45 GMT",
"version": "v2"
}
] | 2024-08-02 | [
[
"Panda",
"Arijit",
""
],
[
"Gangopadhyay",
"Debashis",
""
],
[
"Manna",
"Goutam",
""
]
] | We show that the Raychaudhuri equation remains form invariant for certain solutions of scalar fields $\phi$ whose Lagrangian is non-canonical and of the form $\mathcal{L}(X,\phi)=-V(\phi)F(X)$, with $X=\frac{1}{2} g_{\mu\nu} \nabla^{\mu}\phi \nabla^{\nu} \phi$ and $V(\phi)$ the potential. Solutions exist for both homog... |
2205.09261 | Alberto Roper Pol | Alberto Roper Pol | Gravitational waves from MHD turbulence at the QCD phase transition as a
source for Pulsar Timing Arrays | Contribution to the 2022 Gravitation session of the 56th Rencontres
de Moriond | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We propose that the recent observations reported by the different Pulsar
Timing Array (PTA) collaborations (i.e.~IPTA, EPTA, PPTA, and NANOGrav) of a
common process over several pulsars could correspond to a stochastic
gravitational wave background (SGWB) produced by turbulent sources in the early
universe, in partic... | [
{
"created": "Thu, 19 May 2022 00:53:27 GMT",
"version": "v1"
}
] | 2022-05-20 | [
[
"Pol",
"Alberto Roper",
""
]
] | We propose that the recent observations reported by the different Pulsar Timing Array (PTA) collaborations (i.e.~IPTA, EPTA, PPTA, and NANOGrav) of a common process over several pulsars could correspond to a stochastic gravitational wave background (SGWB) produced by turbulent sources in the early universe, in particul... |
1808.07093 | Abhay Ashtekar | Abhay Ashtekar, Miguel Campiglia and Alok Laddha | Null infinity, the BMS group and infrared issues | 19 pages, no figures. Prepared for the "Introduction to Current
Research Series." Clarifications added following correspondence with expert,
typos corrected, version to appear in the journal | Gen. Relativ. Grav, 50, 140-163 (2018) | 10.1007/s10714-018-2464-3 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There has been a recent resurgence of interest in the structure of the
gravitational field at null infinity, sparked by new results on soft charges
and infrared issues related to the S matrix theory in perturbative quantum
gravity. We summarize these developments and put them in the broader context of
research in the... | [
{
"created": "Tue, 21 Aug 2018 19:20:40 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2018 23:19:12 GMT",
"version": "v2"
}
] | 2018-11-16 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Campiglia",
"Miguel",
""
],
[
"Laddha",
"Alok",
""
]
] | There has been a recent resurgence of interest in the structure of the gravitational field at null infinity, sparked by new results on soft charges and infrared issues related to the S matrix theory in perturbative quantum gravity. We summarize these developments and put them in the broader context of research in the r... |
1412.2389 | Jerzy Matyjasek | Jerzy Matyjasek and Pawel Sadurski | Stress-energy tensor of the quantized massive fields in
Schwarzschild-Tangherlini spacetimes. The back reaction | null | null | 10.1103/PhysRevD.91.044027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and study the approximate stress-energy tensor of the quantized
massive scalar field in higher dimensional Schwarzschild-Tangherlini
spacetimes. The stress-energy tensor is calculated within the framework of the
Schwinger-DeWitt approach. It is shown that in $N$-dimensional spacetime the
main approximati... | [
{
"created": "Sun, 7 Dec 2014 19:13:25 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Sadurski",
"Pawel",
""
]
] | We construct and study the approximate stress-energy tensor of the quantized massive scalar field in higher dimensional Schwarzschild-Tangherlini spacetimes. The stress-energy tensor is calculated within the framework of the Schwinger-DeWitt approach. It is shown that in $N$-dimensional spacetime the main approximation... |
1407.7885 | Jose Manuel Torres | Jose M. Torres and Miguel Alcubierre | Gravitational collapse of charged scalar fields | 19 pages, 30 figures. Accepted in General Relativity and Gravitation | Gen. Relativ. Gravit. 46, 1773 (2014) | 10.1007/s10714-014-1773-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to study the gravitational collapse of charged matter we analyze the
simple model of an self-gravitating massless scalar field coupled to the
electromagnetic field in spherical symmetry. The evolution equations for the
Maxwell-Klein-Gordon sector are derived in the 3+1 formalism, and coupled to
gravity by me... | [
{
"created": "Tue, 29 Jul 2014 21:10:44 GMT",
"version": "v1"
}
] | 2014-11-07 | [
[
"Torres",
"Jose M.",
""
],
[
"Alcubierre",
"Miguel",
""
]
] | In order to study the gravitational collapse of charged matter we analyze the simple model of an self-gravitating massless scalar field coupled to the electromagnetic field in spherical symmetry. The evolution equations for the Maxwell-Klein-Gordon sector are derived in the 3+1 formalism, and coupled to gravity by mean... |
2112.12701 | Marco de Cesare | Marco de Cesare and Edward Wilson-Ewing | Interacting dark sector from the trace-free Einstein equations:
cosmological perturbations with no instability | 23 pages + references; accepted for publication in PRD | Phys. Rev. D 106, 023527 (2022) | 10.1103/PhysRevD.106.023527 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In trace-free Einstein gravity, the stress-energy tensor of matter is not
necessarily conserved and so the theory offers a natural framework for
interacting dark energy models where dark energy has a constant equation of
state $w=-1$. We derive the equations of motion for linear cosmological
perturbations in interact... | [
{
"created": "Thu, 23 Dec 2021 16:48:56 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jul 2022 17:59:05 GMT",
"version": "v2"
}
] | 2022-07-29 | [
[
"de Cesare",
"Marco",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | In trace-free Einstein gravity, the stress-energy tensor of matter is not necessarily conserved and so the theory offers a natural framework for interacting dark energy models where dark energy has a constant equation of state $w=-1$. We derive the equations of motion for linear cosmological perturbations in interactin... |
gr-qc/0011012 | Sergei A. Klioner | Sergei A. Klioner | EinS: a Mathematica package for computations with indexed objects | User manual. For more information see
http://rcswww.urz.tu-dresden.de/~klioner/eins.html | null | null | null | gr-qc | null | This preprint contains a description of a package for Mathematica called
EinS. This package allows one to perform various calculations with indexed
objects.
| [
{
"created": "Fri, 3 Nov 2000 19:13:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Klioner",
"Sergei A.",
""
]
] | This preprint contains a description of a package for Mathematica called EinS. This package allows one to perform various calculations with indexed objects. |
2002.04972 | Shayesteh Ghaffari | S. Ghaffari, A. A. Mamon, H. Moradpour and A. H. Ziaie | Holographic dark energy in Rastall theory | 25 pages, 24 figures | Modern Physics Letters A: Vol. 35, 2050276 (2020) | 10.1142/S0217732320502764 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bearing holographic dark energy hypothesis in mind, the ability of vacuum
energy in describing the current accelerated universe is studied in the
framework of Rastall theory. Here, in addition to the ordinary approach in
which it is expected that this energy plays the role of dark energy, we also
address a new approa... | [
{
"created": "Sat, 8 Feb 2020 06:25:13 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2020 08:26:23 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Sep 2020 06:56:34 GMT",
"version": "v3"
},
{
"created": "Mon, 16 Nov 2020 08:38:11 GMT",
"version": "v4"
}
] | 2020-11-17 | [
[
"Ghaffari",
"S.",
""
],
[
"Mamon",
"A. A.",
""
],
[
"Moradpour",
"H.",
""
],
[
"Ziaie",
"A. H.",
""
]
] | Bearing holographic dark energy hypothesis in mind, the ability of vacuum energy in describing the current accelerated universe is studied in the framework of Rastall theory. Here, in addition to the ordinary approach in which it is expected that this energy plays the role of dark energy, we also address a new approach... |
0910.2843 | Andrea Geralico | Donato Bini, Christian Cherubini, Andrea Geralico, Antonello Ortolan | Dixon's extended bodies and weak gravitational waves | 12 pages, Latex svjour2.cls article class, no figures. Note that the
second term in the rhs of Eq. (2) was misprinted in the published version of
the paper [General Relativity and Gravitation, Vol. 41, 105 (2008)]. The
results are but correct | null | 10.1007/s10714-008-0657-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity considers Dixon's theory as the standard theory to deal
with the motion of extended bodies in a given gravitational background. We
discuss here the features of the "reaction" of an extended body to the passage
of a weak gravitational wave. We find that the body acquires a dipolar moment
induced by ... | [
{
"created": "Thu, 15 Oct 2009 11:35:46 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Bini",
"Donato",
""
],
[
"Cherubini",
"Christian",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Ortolan",
"Antonello",
""
]
] | General relativity considers Dixon's theory as the standard theory to deal with the motion of extended bodies in a given gravitational background. We discuss here the features of the "reaction" of an extended body to the passage of a weak gravitational wave. We find that the body acquires a dipolar moment induced by it... |
gr-qc/0209048 | Ioannis Raptis | Anastasios Mallios and Ioannis Raptis | Finitary, Causal and Quantal Vacuum Einstein Gravity | 133 pages, revised and slightly corrected final version | Int.J.Theor.Phys. 42 (2003) 1479-1619 | null | null | gr-qc math-ph math.MP | null | We continue recent work and formulate the gravitational vacuum Einstein
equations over a locally finite spacetime by using the basic axiomatics,
techniques, ideas and working philosophy of Abstract Differential Geometry. The
whole construction is `fully covariant', `inherently quantum' (both expressions
are analytica... | [
{
"created": "Sun, 15 Sep 2002 21:48:36 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Sep 2002 09:40:02 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Sep 2002 05:34:17 GMT",
"version": "v3"
},
{
"created": "Tue, 1 Oct 2002 14:50:13 GMT",
"version": "v4"
},
{
"cr... | 2007-05-23 | [
[
"Mallios",
"Anastasios",
""
],
[
"Raptis",
"Ioannis",
""
]
] | We continue recent work and formulate the gravitational vacuum Einstein equations over a locally finite spacetime by using the basic axiomatics, techniques, ideas and working philosophy of Abstract Differential Geometry. The whole construction is `fully covariant', `inherently quantum' (both expressions are analyticall... |
2312.15760 | Chen-Kai Qiao | Yi-Gao Liu, Chen-Kai Qiao, Jun Tao | Gravitational Lensing of Spherically Symmetric Black Holes in Dark
Matter Halos | 29 pages, 9 figures, 2 appendices | null | null | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational lensing of supermassive black holes surrounded by dark
matter halo has attracted a great number of interests in recent years. However,
many studies employed simplified dark matter density models, which makes it
very hard to give a precise prediction on the dark matter effects in real
astrophysical g... | [
{
"created": "Mon, 25 Dec 2023 15:51:57 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jan 2024 18:45:21 GMT",
"version": "v2"
},
{
"created": "Sat, 25 May 2024 16:33:29 GMT",
"version": "v3"
}
] | 2024-05-28 | [
[
"Liu",
"Yi-Gao",
""
],
[
"Qiao",
"Chen-Kai",
""
],
[
"Tao",
"Jun",
""
]
] | The gravitational lensing of supermassive black holes surrounded by dark matter halo has attracted a great number of interests in recent years. However, many studies employed simplified dark matter density models, which makes it very hard to give a precise prediction on the dark matter effects in real astrophysical gal... |
1611.09385 | Moritz Platscher | Moritz Platscher and Juri Smirnov | Degravitation of the Cosmological Constant in Bigravity | 17 pages; v2 contains extended discussion on more general solutions;
content matches published version | null | 10.1088/1475-7516/2017/03/051 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article the phenomenon of degravitation of the cosmological constant
is studied in the framework of bigravity. It is demonstrated that despite a
sizable value of the cosmological constant its gravitational effect can be only
mild. The bigravity framework is chosen for this demonstration as it leads to a
consi... | [
{
"created": "Mon, 28 Nov 2016 21:16:27 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Mar 2017 12:27:03 GMT",
"version": "v2"
}
] | 2017-04-05 | [
[
"Platscher",
"Moritz",
""
],
[
"Smirnov",
"Juri",
""
]
] | In this article the phenomenon of degravitation of the cosmological constant is studied in the framework of bigravity. It is demonstrated that despite a sizable value of the cosmological constant its gravitational effect can be only mild. The bigravity framework is chosen for this demonstration as it leads to a consist... |
gr-qc/9710093 | Rudnei O. Ramos | H. P. de Oliveira, Rudnei O. Ramos | Dynamical System Analysis for Inflation with Dissipation | Plain LaTex, 21 pages, 8 eps figs (uses epsf), to be published in
Phys. Rev. D | Phys.Rev. D57 (1998) 741-749 | 10.1103/PhysRevD.57.741 | IF/UERJ-97/12 | gr-qc astro-ph hep-ph | null | We examine the solutions of the equations of motion for an expanding
Universe, taking into account the radiation of the inflaton field energy. We
then analyze the question of the generality of inflationary solutions in this
more general setting of a dissipative system. We find a surprisingly rich
behavior for the sol... | [
{
"created": "Mon, 20 Oct 1997 14:41:46 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"de Oliveira",
"H. P.",
""
],
[
"Ramos",
"Rudnei O.",
""
]
] | We examine the solutions of the equations of motion for an expanding Universe, taking into account the radiation of the inflaton field energy. We then analyze the question of the generality of inflationary solutions in this more general setting of a dissipative system. We find a surprisingly rich behavior for the solut... |
1508.05635 | Marko Vojinovic | Aleksandar Mikovic, Miguel A. Oliveira and Marko Vojinovic | Hamiltonian analysis of the BFCG theory for the Poincare 2-group | v3: Published version. 21 pages | Class. Quant. Grav. 33, 065007 (2016) | 10.1088/0264-9381/33/6/065007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the full Hamiltonian analysis of the topological BFCG action based
on the Poincare 2-group. The Hamiltonian of the theory is constructed, and the
algebra of constraints is computed. The Dirac brackets are evaluated, and the
second class constraints are then eliminated from the theory. The results are
contr... | [
{
"created": "Sun, 23 Aug 2015 18:18:27 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 2015 00:17:31 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Feb 2016 16:11:24 GMT",
"version": "v3"
}
] | 2016-02-26 | [
[
"Mikovic",
"Aleksandar",
""
],
[
"Oliveira",
"Miguel A.",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We perform the full Hamiltonian analysis of the topological BFCG action based on the Poincare 2-group. The Hamiltonian of the theory is constructed, and the algebra of constraints is computed. The Dirac brackets are evaluated, and the second class constraints are then eliminated from the theory. The results are contras... |
2204.01157 | Nishanth Abu Gudapati | Nishanth Gudapati | Scattering for the Equivariant U(1) Problem | null | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extending our previous works on the Cauchy problem for the $2+1$ equivariant
Einstein-wave map system, we prove that the linear part dominates the nonlinear
part of the wave maps equation coupled to the full set of the Einstein
equations, for small data. A key ingredient in the proof is a nonlinear
Morawetz estimate ... | [
{
"created": "Sun, 3 Apr 2022 20:47:21 GMT",
"version": "v1"
}
] | 2022-04-05 | [
[
"Gudapati",
"Nishanth",
""
]
] | Extending our previous works on the Cauchy problem for the $2+1$ equivariant Einstein-wave map system, we prove that the linear part dominates the nonlinear part of the wave maps equation coupled to the full set of the Einstein equations, for small data. A key ingredient in the proof is a nonlinear Morawetz estimate fo... |
gr-qc/0105044 | Fay Dowker | H.F. Dowker and S.N. Thambyahpillai | Many accelerating black holes | 12 pages, LaTeX | Class.Quant.Grav. 20 (2003) 127-136 | 10.1088/0264-9381/20/1/310 | null | gr-qc hep-th | null | We show how the Weyl formalism allows metrics to be written down which
correspond to arbitrary numbers of collinear accelerating neutral black holes
in 3+1 dimensions. The black holes have arbitrary masses and different
accelerations and share a common acceleration horizon. In the general case, the
black holes are jo... | [
{
"created": "Sat, 12 May 2001 00:57:01 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Dowker",
"H. F.",
""
],
[
"Thambyahpillai",
"S. N.",
""
]
] | We show how the Weyl formalism allows metrics to be written down which correspond to arbitrary numbers of collinear accelerating neutral black holes in 3+1 dimensions. The black holes have arbitrary masses and different accelerations and share a common acceleration horizon. In the general case, the black holes are join... |
2301.11772 | Susmita Jana | Susmita Jana, S. Shankaranarayanan (IIT Bombay) | Electromagnetic memory in arbitrary curved space-times | 31 pages, 2 figures, version 2: corrected the Latex errors related to
figures; version 3: added few more references, accepted for publication in
PRD | null | 10.1103/PhysRevD.108.024044 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The gravitational memory effect and its electromagnetic (EM) analog are
potential probes in the strong gravity regime. In the literature, this effect
is derived for static observers at asymptotic infinity. While this is a
physically consistent approach, it restricts the space-time geometries for
which one can obtain ... | [
{
"created": "Fri, 27 Jan 2023 15:15:12 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jan 2023 07:36:57 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Jun 2023 06:05:01 GMT",
"version": "v3"
}
] | 2023-08-02 | [
[
"Jana",
"Susmita",
"",
"IIT Bombay"
],
[
"Shankaranarayanan",
"S.",
"",
"IIT Bombay"
]
] | The gravitational memory effect and its electromagnetic (EM) analog are potential probes in the strong gravity regime. In the literature, this effect is derived for static observers at asymptotic infinity. While this is a physically consistent approach, it restricts the space-time geometries for which one can obtain th... |
gr-qc/9511005 | Kiyoshi Shiraishi | Kiyoshi Shiraishi (Akita Junior College) | Extreme Dilatonic Black Holes on a Torus | 10 pages, revtex, Figures not included | Soryushiron Kenkyu (Kyoto) 93 (1996), No. 4, pp. 310-318 | 10.24532/soken.93.4_310 | AJC-HEP-28 | gr-qc | null | The interaction of maximally-charged dilatonic black holes on $R^{4}\times
T^{d}$ is studied in the low-velocity limit. In particular, the scattering of
two black holes on $R^{4}\times S^{1}$ is investigated.
| [
{
"created": "Thu, 2 Nov 1995 02:31:06 GMT",
"version": "v1"
}
] | 2020-06-02 | [
[
"Shiraishi",
"Kiyoshi",
"",
"Akita Junior College"
]
] | The interaction of maximally-charged dilatonic black holes on $R^{4}\times T^{d}$ is studied in the low-velocity limit. In particular, the scattering of two black holes on $R^{4}\times S^{1}$ is investigated. |
1002.0173 | Roberto A. Sussman | Roberto A Sussman | Radial asymptotics of Lemaitre-Tolman-Bondi dust models | 44 pages (including a long appendix), 3 figures, IOP LaTeX style.
Typos corrected and an important reference added. Accepted for publication in
General Relativity and Gravitation | General Relativity and Gravitation, vol 42, pp 2813-2864 (2010) | 10.1007/s10714-010-1029-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the radial asymptotic behavior of spherically symmetric
Lemaitre-Tolman-Bondi dust models by looking at their covariant scalars along
radial rays, which are spacelike geodesics parametrized by proper length
$\ell$, orthogonal to the 4-velocity and to the orbits of SO(3). By introducing
quasi-local scalars ... | [
{
"created": "Mon, 1 Feb 2010 06:34:54 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2010 05:43:18 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Sussman",
"Roberto A",
""
]
] | We examine the radial asymptotic behavior of spherically symmetric Lemaitre-Tolman-Bondi dust models by looking at their covariant scalars along radial rays, which are spacelike geodesics parametrized by proper length $\ell$, orthogonal to the 4-velocity and to the orbits of SO(3). By introducing quasi-local scalars de... |
1711.00040 | Katerina Chatziioannou | Katerina Chatziioannou, James Alexander Clark, Andreas Bauswein,
Margaret Millhouse, Tyson B. Littenberg, Neil Cornish | Inferring the post-merger gravitational wave emission from binary
neutron star coalescences | 11 pages, 12 figures, final published version | Phys. Rev. D 96, 124035 (2017) | 10.1103/PhysRevD.96.124035 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a robust method to characterize the gravitational wave emission
from the remnant of a neutron star coalescence. Our approach makes only minimal
assumptions about the morphology of the signal and provides a full posterior
probability distribution of the underlying waveform. We apply our method on
simulated ... | [
{
"created": "Tue, 31 Oct 2017 18:24:17 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Dec 2017 17:40:14 GMT",
"version": "v2"
}
] | 2018-01-03 | [
[
"Chatziioannou",
"Katerina",
""
],
[
"Clark",
"James Alexander",
""
],
[
"Bauswein",
"Andreas",
""
],
[
"Millhouse",
"Margaret",
""
],
[
"Littenberg",
"Tyson B.",
""
],
[
"Cornish",
"Neil",
""
]
] | We present a robust method to characterize the gravitational wave emission from the remnant of a neutron star coalescence. Our approach makes only minimal assumptions about the morphology of the signal and provides a full posterior probability distribution of the underlying waveform. We apply our method on simulated da... |
2010.05879 | Piyabut Burikham | Piyabut Burikham, Supakchai Ponglertsakul, Taum Withucharn | Quasi-normal Modes of near-extremal black holes in Generalized
spherically symmetric spacetime and Strong Cosmic Censorship Conjecture | 39 pages, 9 figures, to appear in EPJC. arXiv admin note: Sections of
this work were previously part of arXiv:1911.11448 which is being split | null | 10.1140/epjc/s10052-020-08528-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A number of near-extremal conditions are utilized to simplify the equation of
motion of the neutral scalar perturbations in generalized spherically symmetric
black hole background into a differential equation with the P\"{o}schl-Teller
potential. An analytic formula for quasinormal frequencies is obtained. The
analyt... | [
{
"created": "Wed, 7 Oct 2020 14:36:07 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Burikham",
"Piyabut",
""
],
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Withucharn",
"Taum",
""
]
] | A number of near-extremal conditions are utilized to simplify the equation of motion of the neutral scalar perturbations in generalized spherically symmetric black hole background into a differential equation with the P\"{o}schl-Teller potential. An analytic formula for quasinormal frequencies is obtained. The analytic... |
1003.5143 | Luca Lusanna | David Alba and Luca Lusanna | The Einstein-Maxwell-Particle System: II) The Weak Field Approximation
in the Non-Harmonic 3-Orthogonal Gauges and Hamiltonian Post-Minkowskian
Gravity: the N-Body Problem and Gravitational Waves with Asymptotic
Background | 98 pages. Improved presentation, clarifications and correction of
typos. In the Conclusions there is a discussion of the gauge problem and of
the observational conventions in general relativity | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this second paper we define a Post-Minkowskian (PM) weak field
approximation leading to a linearization of the Hamilton equations of ADM
tetrad gravity in the York canonical basis in a family of non-harmonic
3-orthogonal Schwinger time gauges. The York time ${}^3K$ (the relativistic
inertial gauge variable, not ex... | [
{
"created": "Fri, 26 Mar 2010 14:15:56 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Sep 2010 14:19:43 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Apr 2011 12:48:53 GMT",
"version": "v3"
}
] | 2015-03-13 | [
[
"Alba",
"David",
""
],
[
"Lusanna",
"Luca",
""
]
] | In this second paper we define a Post-Minkowskian (PM) weak field approximation leading to a linearization of the Hamilton equations of ADM tetrad gravity in the York canonical basis in a family of non-harmonic 3-orthogonal Schwinger time gauges. The York time ${}^3K$ (the relativistic inertial gauge variable, not exis... |
0706.2909 | Abraham Harte | Abraham I. Harte | Extended-body effects in cosmological spacetimes | 14 pages, minor clarifications added | Class.Quant.Grav.24:5161-5172,2007 | 10.1088/0264-9381/24/20/015 | null | gr-qc | null | We study the dynamics of extended test bodies in flat
Friedmann-Robertson-Walker spacetimes. It is shown that such objects can
usually alter their inertial mass, spin, and center-of-mass trajectory purely
through the use of internal deformations. Many of these effects do not have
Newtonian analogs, and exist despite ... | [
{
"created": "Wed, 20 Jun 2007 04:29:24 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Oct 2007 16:56:37 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Harte",
"Abraham I.",
""
]
] | We study the dynamics of extended test bodies in flat Friedmann-Robertson-Walker spacetimes. It is shown that such objects can usually alter their inertial mass, spin, and center-of-mass trajectory purely through the use of internal deformations. Many of these effects do not have Newtonian analogs, and exist despite th... |
1501.00904 | Benjamin Koch | Benjamin Koch and Paola Rioseco | Black Hole Solutions for Scale Dependent Couplings: The de Sitter and
the Reissner-Nordstr\"om Case | 17 pages, 7 figures | Benjamin Koch and Paola Rioseco 2016 Class. Quantum Grav. 33
035002 | 10.1088/0264-9381/33/3/035002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Allowing for scale dependence of the gravitational couplings leads to a
generalization of the corresponding field equations. In this work, those
equations are solved for the Einstein-Hilbert and the Einstein-Maxwell case,
leading to generalizations of the (Anti)-de Sitter and the Reissner-Nordstr\"om
black holes. Tho... | [
{
"created": "Mon, 5 Jan 2015 16:00:11 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jan 2015 08:51:10 GMT",
"version": "v2"
}
] | 2016-03-01 | [
[
"Koch",
"Benjamin",
""
],
[
"Rioseco",
"Paola",
""
]
] | Allowing for scale dependence of the gravitational couplings leads to a generalization of the corresponding field equations. In this work, those equations are solved for the Einstein-Hilbert and the Einstein-Maxwell case, leading to generalizations of the (Anti)-de Sitter and the Reissner-Nordstr\"om black holes. Those... |
2012.03608 | Evan Hall | Evan D. Hall, Kevin Kuns, Joshua R. Smith, Yuntao Bai, Christopher
Wipf, Sebastien Biscans, Rana X Adhikari, Koji Arai, Stefan Ballmer, Lisa
Barsotti, Yanbei Chen, Matthew Evans, Peter Fritschel, Jan Harms, Brittany
Kamai, Jameson Graef Rollins, David Shoemaker, Bram Slagmolen, Rainer Weiss,
Hiro Yamamoto | Gravitational-wave physics with Cosmic Explorer: limits to low-frequency
sensitivity | 24 pages, 19 figures; expanded discussion of residual gas and quantum
noises, and updated scattered light estimates | Phys. Rev. D 103, 122004 (2021) | 10.1103/PhysRevD.103.122004 | CE-P2000005 and LIGO-P2000405 | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Cosmic Explorer (CE) is a next-generation ground-based gravitational-wave
observatory concept, envisioned to begin operation in the 2030s, and expected
to be capable of observing binary neutron star and black hole mergers back to
the time of the first stars. Cosmic Explorer's sensitive band will extend below
10 Hz, w... | [
{
"created": "Mon, 7 Dec 2020 11:49:21 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 2020 22:14:05 GMT",
"version": "v2"
},
{
"created": "Thu, 13 May 2021 16:47:31 GMT",
"version": "v3"
}
] | 2021-06-30 | [
[
"Hall",
"Evan D.",
""
],
[
"Kuns",
"Kevin",
""
],
[
"Smith",
"Joshua R.",
""
],
[
"Bai",
"Yuntao",
""
],
[
"Wipf",
"Christopher",
""
],
[
"Biscans",
"Sebastien",
""
],
[
"Adhikari",
"Rana X",
""
],
[
... | Cosmic Explorer (CE) is a next-generation ground-based gravitational-wave observatory concept, envisioned to begin operation in the 2030s, and expected to be capable of observing binary neutron star and black hole mergers back to the time of the first stars. Cosmic Explorer's sensitive band will extend below 10 Hz, whe... |
1912.10758 | Wen-Biao Han | Shu-Cheng Yang, Wen-Biao Han, Gang Wang | Tests of weak equivalence principle with the gravitational wave signals
in the LIGO-Virgo catalogue GWTC-1 | 14 pages, 3 figures | null | 10.1093/mnrasl/slaa143 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak equivalence principle (WEP) is the cornerstone of gravitational
theories. At the local scale, WEP has been tested to high accuracy by various
experiments. On the intergalactic distance scale, WEP could be tested by
comparing the arrival time of different messengers emitted from the same
source. The gravitati... | [
{
"created": "Mon, 23 Dec 2019 12:14:50 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jan 2020 07:00:54 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Oct 2020 11:49:05 GMT",
"version": "v3"
}
] | 2020-10-26 | [
[
"Yang",
"Shu-Cheng",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Wang",
"Gang",
""
]
] | The weak equivalence principle (WEP) is the cornerstone of gravitational theories. At the local scale, WEP has been tested to high accuracy by various experiments. On the intergalactic distance scale, WEP could be tested by comparing the arrival time of different messengers emitted from the same source. The gravitation... |
1801.03976 | Giorgio Papini | Giorgio Papini | Structured objects in quantum gravity. The external field approximation | 5 pages | null | 10.1142/S0218271818501043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the external field approximation (EFA) gravity and inertia are represented
by a two-point vector that is the byproduct of symmetry breaking. The vector is
accompanied by the appearance of classical, vortical structures. Its
interaction range is, in general, that of the metric tensor, but, in the
context of a simpl... | [
{
"created": "Thu, 11 Jan 2018 20:14:43 GMT",
"version": "v1"
}
] | 2018-07-25 | [
[
"Papini",
"Giorgio",
""
]
] | In the external field approximation (EFA) gravity and inertia are represented by a two-point vector that is the byproduct of symmetry breaking. The vector is accompanied by the appearance of classical, vortical structures. Its interaction range is, in general, that of the metric tensor, but, in the context of a simple ... |
2212.06760 | Kimet Jusufi | Kimet Jusufi | Regular solutions for black strings and torus-like black holes | 11 pages, no figures. Accepted for publication in Physics of the Dark
Universe | Phys. Dark Univ. 39 (2023) 101156 | 10.1016/j.dark.2022.101156 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we extend the recent black hole solution with spherical
symmetry [Phys. Lett. B \textbf{835} (2022), 137546], to a new class of black
hole solutions with different topology, namely, a torus-like black hole and a
black string in the presence of the cosmological constant. We have used the
regularized ex... | [
{
"created": "Mon, 12 Dec 2022 08:00:35 GMT",
"version": "v1"
}
] | 2022-12-15 | [
[
"Jusufi",
"Kimet",
""
]
] | In this letter, we extend the recent black hole solution with spherical symmetry [Phys. Lett. B \textbf{835} (2022), 137546], to a new class of black hole solutions with different topology, namely, a torus-like black hole and a black string in the presence of the cosmological constant. We have used the regularized expr... |
gr-qc/9906004 | Shahar Hod | Shahar Hod | Best Approximation to a Reversible Process in Black-Hole Physics and the
Area Spectrum of Spherical Black Holes | 10 pages | Phys.Rev.D59:024014,1999 | 10.1103/PhysRevD.59.024014 | null | gr-qc hep-th | null | The assimilation of a quantum (finite size) particle by a
Reissner-Nordstr\"om black hole inevitably involves an increase in the
black-hole surface area. It is shown that this increase can be minimized if one
considers the capture of the lightest charged particle in nature. The
unavoidable area increase is attributed... | [
{
"created": "Wed, 2 Jun 1999 11:30:58 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Hod",
"Shahar",
""
]
] | The assimilation of a quantum (finite size) particle by a Reissner-Nordstr\"om black hole inevitably involves an increase in the black-hole surface area. It is shown that this increase can be minimized if one considers the capture of the lightest charged particle in nature. The unavoidable area increase is attributed t... |
2307.02033 | Tatsuya Narikawa | Tatsuya Narikawa | Multipole tidal effects in the post-Newtonian gravitational-wave phase
of compact binary coalescences | 14 pages, 7 figures. Matches with published version | Phys. Rev. D 108, 063029 (2023) | 10.1103/PhysRevD.108.063029 | LIGO-P2300196 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the multipole component form of the gravitational wave tidal phase
for compact binary coalescences (MultipoleTidal), which consists of the mass
quadrupole, the current quadrupole, and the mass octupole moments. We
demonstrate the phase evolution and the phase difference between the tidal
multipole moments ... | [
{
"created": "Wed, 5 Jul 2023 05:30:25 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Sep 2023 07:07:49 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Sep 2023 01:43:01 GMT",
"version": "v3"
}
] | 2023-09-27 | [
[
"Narikawa",
"Tatsuya",
""
]
] | We present the multipole component form of the gravitational wave tidal phase for compact binary coalescences (MultipoleTidal), which consists of the mass quadrupole, the current quadrupole, and the mass octupole moments. We demonstrate the phase evolution and the phase difference between the tidal multipole moments (M... |
gr-qc/9710132 | Ioan Vancea | I. V. Vancea | Euclidean Supergravity in Terms of Dirac Eigenvalues | Misprints and formulae corrected; to appear in Phys. Rev. D | Phys.Rev. D58 (1998) 045005 | 10.1103/PhysRevD.58.045005 | null | gr-qc hep-th | null | It has been recently shown that the eigenvalues of the Dirac operator can be
considered as dynamical variables of Euclidean gravity. The purpose of this
paper is to explore the possiblity that the eigenvalues of the Dirac operator
might play the same role in the case of supergravity. It is shown that for this
purpose... | [
{
"created": "Thu, 30 Oct 1997 18:02:58 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jan 1998 17:44:50 GMT",
"version": "v2"
},
{
"created": "Fri, 10 Apr 1998 14:49:47 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"Vancea",
"I. V.",
""
]
] | It has been recently shown that the eigenvalues of the Dirac operator can be considered as dynamical variables of Euclidean gravity. The purpose of this paper is to explore the possiblity that the eigenvalues of the Dirac operator might play the same role in the case of supergravity. It is shown that for this purpose s... |
1210.2011 | George Ruppeiner | George Ruppeiner | Thermodynamic curvature: pure fluids to black holes | 4 pages, 2 figures, 1 table | J. Phys.: Conf. Series 410, 012138 (2013) | 10.1088/1742-6596/410/1/012138 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thermodynamics unavoidably contains fluctuation theory, expressible in terms
of a unique thermodynamic information metric. This metric produces an invariant
thermodynamic Riemannian curvature scalar $R$ which, in fluid and spin systems,
measures interatomic interactions. Specifically, $|R|$ measures the size of
organ... | [
{
"created": "Sun, 7 Oct 2012 00:25:12 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Ruppeiner",
"George",
""
]
] | Thermodynamics unavoidably contains fluctuation theory, expressible in terms of a unique thermodynamic information metric. This metric produces an invariant thermodynamic Riemannian curvature scalar $R$ which, in fluid and spin systems, measures interatomic interactions. Specifically, $|R|$ measures the size of organiz... |
1007.2704 | Seyed Hossein Hendi | S. H. Hendi | Charged BTZ-like Black Holes in Higher Dimensions | 5 pages, two column format, one figure | Eur.Phys.J.C71:1551,2011 | 10.1140/epjc/s10052-011-1551-3 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by many worthwhile paper about (2 + 1)-dimensional BTZ black holes,
we generalize them to to (n + 1)-dimensional solutions, so called BTZ-like
solutions. We show that the electric field of BTZ-like solutions is the same as
(2 + 1)-dimensional BTZ black holes, and also their lapse functions are
approximately... | [
{
"created": "Fri, 16 Jul 2010 06:54:57 GMT",
"version": "v1"
}
] | 2011-03-03 | [
[
"Hendi",
"S. H.",
""
]
] | Motivated by many worthwhile paper about (2 + 1)-dimensional BTZ black holes, we generalize them to to (n + 1)-dimensional solutions, so called BTZ-like solutions. We show that the electric field of BTZ-like solutions is the same as (2 + 1)-dimensional BTZ black holes, and also their lapse functions are approximately t... |
1607.08359 | Etera R. Livine | Christoph Charles, Etera R. Livine | The closure constraint for the hyperbolic tetrahedron as a Bianchi
identity | 31 pages | null | 10.1007/s10714-017-2255-2 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The closure constraint is a central piece of the mathematics of loop quantum
gravity. It encodes the gauge invariance of the spin network states of quantum
geometry and provides them with a geometrical interpretation: each decorated
vertex of a spin network is dual to a quantized polyhedron in $\mathbb{R}^{3}$.
For i... | [
{
"created": "Thu, 28 Jul 2016 08:48:39 GMT",
"version": "v1"
}
] | 2017-06-28 | [
[
"Charles",
"Christoph",
""
],
[
"Livine",
"Etera R.",
""
]
] | The closure constraint is a central piece of the mathematics of loop quantum gravity. It encodes the gauge invariance of the spin network states of quantum geometry and provides them with a geometrical interpretation: each decorated vertex of a spin network is dual to a quantized polyhedron in $\mathbb{R}^{3}$. For ins... |
1004.2805 | Roberto Valentino Montaquila | Roberto Valentino Montaquila | Electromagnetic and Gravitational Waves on a de Sitter background | 86 pages, 37 figures, Ph.D. thesis of the author | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the longstanding problems of modern gravitational physics is the
detection of gravitational waves, for which the standard theoretical analysis
relies upon the split of the space-time metric into a background metric plus
perturbation. However, as is well known, the background need not be Minkowskian
in several ... | [
{
"created": "Fri, 16 Apr 2010 09:55:30 GMT",
"version": "v1"
}
] | 2010-04-19 | [
[
"Montaquila",
"Roberto Valentino",
""
]
] | One of the longstanding problems of modern gravitational physics is the detection of gravitational waves, for which the standard theoretical analysis relies upon the split of the space-time metric into a background metric plus perturbation. However, as is well known, the background need not be Minkowskian in several ca... |
2407.01259 | Alex Jourjine | A. N. Jourjine | On the Coupling of Matter and Gravity to the Boundary of Space-Time | 9 pages. Minor changes to the journal version | Physics Letters B 136B (1984) 237 | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We show that under certain boundary conditions on the matter fields and on
the fluctuations of the background metric the gravity-matter system can be
coupled to the boundary of space-time through the stress-energy tensor. The
connection of the formalism developed to the Casimir effect is discussed.
| [
{
"created": "Mon, 1 Jul 2024 13:10:48 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"Jourjine",
"A. N.",
""
]
] | We show that under certain boundary conditions on the matter fields and on the fluctuations of the background metric the gravity-matter system can be coupled to the boundary of space-time through the stress-energy tensor. The connection of the formalism developed to the Casimir effect is discussed. |
1306.4005 | Alcides Garat | Alcides Garat | Euler observers in geometrodynamics | 11 pages. arXiv admin note: substantial text overlap with
arXiv:1306.0602, arXiv:1306.2174 | International Journal of Geometric Methods in Modern Physics Vol.
11, No. 06, 1450060 (2014) | 10.1142/S0219887814500601 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Euler observers are a fundamental tool for the study of spacetime evolution.
Cauchy surfaces are evolved through the use of hypersurface orthogonal fields
and their relationship to coordinate observers, that enable the use of already
developed algorithms. In geometrodynamics new tetrad vectors have been
introduced wi... | [
{
"created": "Mon, 17 Jun 2013 20:17:41 GMT",
"version": "v1"
}
] | 2019-08-20 | [
[
"Garat",
"Alcides",
""
]
] | Euler observers are a fundamental tool for the study of spacetime evolution. Cauchy surfaces are evolved through the use of hypersurface orthogonal fields and their relationship to coordinate observers, that enable the use of already developed algorithms. In geometrodynamics new tetrad vectors have been introduced with... |
1009.5080 | Cosimo Bambi | Cosimo Bambi, Naoki Yoshida | Thick disk accretion in Kerr space-time with arbitrary spin parameters | 11 pages, 10 figures | Phys.Rev.D82:124037,2010 | 10.1103/PhysRevD.82.124037 | IPMU10-0147 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we extend our previous works on spherically symmetric accretion
onto black holes and super-spinars to the case in which the fluid has a finite
angular momentum initially. We run 2.5D and 3D general relativistic
hydrodynamic simulations of the accretion of a fat disk. We study how the
accretion process c... | [
{
"created": "Sun, 26 Sep 2010 09:39:08 GMT",
"version": "v1"
}
] | 2010-12-22 | [
[
"Bambi",
"Cosimo",
""
],
[
"Yoshida",
"Naoki",
""
]
] | In this paper we extend our previous works on spherically symmetric accretion onto black holes and super-spinars to the case in which the fluid has a finite angular momentum initially. We run 2.5D and 3D general relativistic hydrodynamic simulations of the accretion of a fat disk. We study how the accretion process cha... |
1502.02533 | Benito A. Ju\'arez-Aubry | Benito A. Ju\'arez-Aubry | Can a particle detector cross a Cauchy horizon? | 11 pages, 1 figure. Proceedings of the VII Black Holes Workshop. To
appear in the International Journal of Modern Physics D. v2: Corrected typos.
Conclusions expanded | null | 10.1142/S0218271815420055 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cauchy horizons are well known to exhibit instabilities in classical
spacetime dynamics and singularities in quantum field theory. We analyse the
response of an Unruh-DeWitt particle detector that falls towards a Cauchy
horizon, in terms of the specifics of the horizon, the choice of the quantum
state and the specifi... | [
{
"created": "Mon, 9 Feb 2015 16:13:42 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Apr 2015 11:57:36 GMT",
"version": "v2"
}
] | 2015-06-02 | [
[
"Juárez-Aubry",
"Benito A.",
""
]
] | Cauchy horizons are well known to exhibit instabilities in classical spacetime dynamics and singularities in quantum field theory. We analyse the response of an Unruh-DeWitt particle detector that falls towards a Cauchy horizon, in terms of the specifics of the horizon, the choice of the quantum state and the specifics... |
1109.6249 | Lorenzo Iorio | Lorenzo Iorio | Constraints from orbital motions around the Earth of the environmental
fifth-force hypothesis for the OPERA superluminal neutrino phenomenology | LaTex2e, 18 pages, 4 figures, 1 table, 81 references | J.High En.Phys.5: 73, 2012 | 10.1007/JHEP05(2012)073 | null | gr-qc astro-ph.EP hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been recently suggested by Dvali and Vikman that the superluminal
neutrino phenomenology of the OPERA experiment may be due to an environmental
feature of the Earth, naturally yielding a long-range fifth force of
gravitational origin whose coupling with the neutrino is set by the scale M_*,
in units of reduced... | [
{
"created": "Wed, 28 Sep 2011 15:46:17 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Sep 2011 15:32:20 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Sep 2011 08:58:05 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Oct 2011 19:01:39 GMT",
"version": "v4"
},
{
"cr... | 2015-03-19 | [
[
"Iorio",
"Lorenzo",
""
]
] | It has been recently suggested by Dvali and Vikman that the superluminal neutrino phenomenology of the OPERA experiment may be due to an environmental feature of the Earth, naturally yielding a long-range fifth force of gravitational origin whose coupling with the neutrino is set by the scale M_*, in units of reduced P... |
1406.2934 | Bijunath Patla | Bijunath R. Patla | Reduction of magnetic perturbation for SR-POEM | null | null | null | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | SR-POEM is a Galilean test of the weak equivalence principle(WEP) that aims
to measure the fractional acceleration difference $\eta$ with a mission
uncertainty $\sigma(\eta)=1\times 10^{-17}$for a pair of test substances. It is
to be conducted during the low-drag free fall portion of a sounding rocket
flight. The int... | [
{
"created": "Wed, 11 Jun 2014 15:28:17 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Aug 2015 23:56:30 GMT",
"version": "v2"
}
] | 2015-08-31 | [
[
"Patla",
"Bijunath R.",
""
]
] | SR-POEM is a Galilean test of the weak equivalence principle(WEP) that aims to measure the fractional acceleration difference $\eta$ with a mission uncertainty $\sigma(\eta)=1\times 10^{-17}$for a pair of test substances. It is to be conducted during the low-drag free fall portion of a sounding rocket flight. The inter... |
1501.06288 | Dilek Kazici \c{C}iftci | Dilek Kaz{\i}c{\i} \c{C}iftci, \"Ozg\"ur Delice | Brans-Dicke-Maxwell Solutions for Higher Dimensional Static Cylindrical
Symmetric Spacetime | 9 Pages, article | J. Math. Phys. 56, 072502 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, Brans-Dicke-Maxwell type vacuum solutions are considered for a
static cylindrically symmetric spacetime in arbitrary dimensions. Exact
solutions are obtained by directly solving the field equations for the case
where an azimuthal magnetic field is present. Other configurations such as
axial magnetic fi... | [
{
"created": "Mon, 26 Jan 2015 08:47:11 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jul 2015 09:51:37 GMT",
"version": "v2"
}
] | 2015-07-23 | [
[
"Çiftci",
"Dilek Kazıcı",
""
],
[
"Delice",
"Özgür",
""
]
] | In this paper, Brans-Dicke-Maxwell type vacuum solutions are considered for a static cylindrically symmetric spacetime in arbitrary dimensions. Exact solutions are obtained by directly solving the field equations for the case where an azimuthal magnetic field is present. Other configurations such as axial magnetic fiel... |
1812.03259 | Nicholas Mecholsky | Rafael T. Eufrasio and Nicholas A. Mecholsky and Lorenzo Resca | Curved Space, curved Time, and curved Space-Time in Schwarzschild
geodetic geometry | 14 pages, 19 figures | General Relativity and Gravitation 50.12 (2018): 159 | 10.1007/s10714-018-2481-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate geodesic orbits and manifolds for metrics associated with
Schwarzschild geometry, considering space and time curvatures separately. For
`a-temporal' space, we solve a central geodesic orbit equation in terms of
elliptic integrals. The intrinsic geometry of a two-sided equatorial plane
corresponds to th... | [
{
"created": "Sat, 8 Dec 2018 03:20:14 GMT",
"version": "v1"
}
] | 2018-12-11 | [
[
"Eufrasio",
"Rafael T.",
""
],
[
"Mecholsky",
"Nicholas A.",
""
],
[
"Resca",
"Lorenzo",
""
]
] | We investigate geodesic orbits and manifolds for metrics associated with Schwarzschild geometry, considering space and time curvatures separately. For `a-temporal' space, we solve a central geodesic orbit equation in terms of elliptic integrals. The intrinsic geometry of a two-sided equatorial plane corresponds to that... |
1403.5684 | Irene Brito | I. Brito, J. Carot, F. C. Mena, E.G.L.R. Vaz | Cylindrically symmetric static solutions of the Einstein field equations
for elastic matter | 18 pages, 6 figures | Journal of Mathematical Physics, 53 (2012) 122504 | 10.1063/1.4769223 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein field equations are derived for a static cylindrically symmetric
spacetime with elastic matter. The equations can be reduced to a system of two
nonlinear ordinary differential equations and we present analytical and
numerical solutions satisfying the dominant energy conditions. Furthermore, we
show that ... | [
{
"created": "Sat, 22 Mar 2014 16:47:16 GMT",
"version": "v1"
}
] | 2014-03-25 | [
[
"Brito",
"I.",
""
],
[
"Carot",
"J.",
""
],
[
"Mena",
"F. C.",
""
],
[
"Vaz",
"E. G. L. R.",
""
]
] | The Einstein field equations are derived for a static cylindrically symmetric spacetime with elastic matter. The equations can be reduced to a system of two nonlinear ordinary differential equations and we present analytical and numerical solutions satisfying the dominant energy conditions. Furthermore, we show that th... |
gr-qc/9406015 | Chris Isham | Chris Isham, Noah Linden & Stefan Schreckenberg | The Classification of Decoherence Functionals: An Analogue of Gleason's
Theorem | 18 Pages, Imperial/TP/93--94/42, DAMTP 94--44 | J.Math.Phys. 35 (1994) 6360-6370 | 10.1063/1.530679 | null | gr-qc hep-th | null | Gell-Mann and Hartle have proposed a significant generalisation of quantum
theory with a scheme whose basic ingredients are `histories' and decoherence
functionals. Within this scheme it is natural to identify the space $\UP$ of
propositions about histories with an orthoalgebra or lattice. This raises the
important p... | [
{
"created": "Wed, 8 Jun 1994 13:14:11 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Isham",
"Chris",
""
],
[
"Linden",
"Noah",
""
],
[
"Schreckenberg",
"Stefan",
""
]
] | Gell-Mann and Hartle have proposed a significant generalisation of quantum theory with a scheme whose basic ingredients are `histories' and decoherence functionals. Within this scheme it is natural to identify the space $\UP$ of propositions about histories with an orthoalgebra or lattice. This raises the important pro... |
2308.07373 | Emil Have | Jelle Hartong, Emil Have, Niels A. Obers, Igor Pikovski | A coupling prescription for post-Newtonian corrections in Quantum
Mechanics | 43 pages incl. 1 appendix, 1 figure | SciPost Phys. 16, 088 (2024) | 10.21468/SciPostPhys.16.3.088 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The interplay between quantum theory and general relativity remains one of
the main challenges of modern physics. A renewed interest in the low-energy
limit is driven by the prospect of new experiments that could probe this
interface. Here we develop a covariant framework for expressing post-Newtonian
corrections to ... | [
{
"created": "Mon, 14 Aug 2023 18:00:06 GMT",
"version": "v1"
}
] | 2024-04-03 | [
[
"Hartong",
"Jelle",
""
],
[
"Have",
"Emil",
""
],
[
"Obers",
"Niels A.",
""
],
[
"Pikovski",
"Igor",
""
]
] | The interplay between quantum theory and general relativity remains one of the main challenges of modern physics. A renewed interest in the low-energy limit is driven by the prospect of new experiments that could probe this interface. Here we develop a covariant framework for expressing post-Newtonian corrections to Sc... |
1506.03822 | Yukari Nakanishi | Yukari Nakanishi | Regularization and conformal transformations of the power spectrum in
general single field inflation | 35 pages, 3 figures. This paper is based on master's thesis submitted
to Osaka University | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The regularization of the CMB power spectrum is an important issue of
cosmology. Most approaches assume that there is no need to regularize the power
spectrum, while Parker advocated the new regularization approach for the power
spectrum in 2007: the adiabatic regularization, which was originally developed
for partic... | [
{
"created": "Thu, 11 Jun 2015 20:03:02 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Nakanishi",
"Yukari",
""
]
] | The regularization of the CMB power spectrum is an important issue of cosmology. Most approaches assume that there is no need to regularize the power spectrum, while Parker advocated the new regularization approach for the power spectrum in 2007: the adiabatic regularization, which was originally developed for particle... |
1306.2082 | Zhao Xue | Zhao Xue and Sheng-liang Cui | Holographic Superconductors in f(R) Gravity | 17 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the holographic superconductors in f(R) gravity, and show how the
critical temperature and the condensate of the dual operator depend on the
modifications to Einstein gravity. We first review the black holes with
constant curvature, which are clear in f(R) gravity. The dependencies are
represented with the m... | [
{
"created": "Mon, 10 Jun 2013 01:39:37 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jul 2013 06:49:48 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Feb 2014 07:26:48 GMT",
"version": "v3"
}
] | 2014-02-24 | [
[
"Xue",
"Zhao",
""
],
[
"Cui",
"Sheng-liang",
""
]
] | We study the holographic superconductors in f(R) gravity, and show how the critical temperature and the condensate of the dual operator depend on the modifications to Einstein gravity. We first review the black holes with constant curvature, which are clear in f(R) gravity. The dependencies are represented with the mod... |
1601.05120 | Lior M. Burko | Lior M. Burko, Gaurav Khanna, An{\i}l Zengino\v{g}lu | Cauchy-horizon singularity inside perturbed Kerr black holes | 5 pages, 6 figures in main paper. A 3 page erratum (to be published
in PRD) with 3 figures and a corrected table appended. We report in the
erratum that we find also the magnitude of $psi_4$ and of the curvature
scalar $K$ to agree with perturbation analysis | Phys. Rev. D 93, 041501(R) (2016) | 10.1103/PhysRevD.93.041501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Cauchy horizon inside a perturbed Kerr black hole develops an instability
that transforms it into a curvature singularity. We solve for the linearized
Weyl scalars $\psi_0$ and $\psi_4$ and for the curvature scalar
$R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta}$ along outgoing null
rays approaching the C... | [
{
"created": "Tue, 19 Jan 2016 22:22:46 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Dec 2017 18:23:28 GMT",
"version": "v2"
}
] | 2017-12-05 | [
[
"Burko",
"Lior M.",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Zenginoǧlu",
"Anıl",
""
]
] | The Cauchy horizon inside a perturbed Kerr black hole develops an instability that transforms it into a curvature singularity. We solve for the linearized Weyl scalars $\psi_0$ and $\psi_4$ and for the curvature scalar $R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta}$ along outgoing null rays approaching the Cau... |
1211.1778 | C. Q. Geng | Yi-Peng Wu, Chao-Qiang Geng | Matter Density Perturbations in Modified Teleparallel Theories | 18 pages, 1 figure, accepted by JHEP | JHEP 1211, 142 (2012) | 10.1007/JHEP11(2012)142 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the matter density perturbations in modified teleparallel gravity
theories, where extra degrees of freedom arise from the local Lorentz violation
in the tangent space. We formulate a vierbein perturbation with variables
addressing all the 16 components of the vierbein field. By assuming the perfect
fluid mat... | [
{
"created": "Thu, 8 Nov 2012 07:44:08 GMT",
"version": "v1"
}
] | 2013-06-25 | [
[
"Wu",
"Yi-Peng",
""
],
[
"Geng",
"Chao-Qiang",
""
]
] | We study the matter density perturbations in modified teleparallel gravity theories, where extra degrees of freedom arise from the local Lorentz violation in the tangent space. We formulate a vierbein perturbation with variables addressing all the 16 components of the vierbein field. By assuming the perfect fluid matte... |
1201.5611 | Uro\v{s} Kosti\'c | Uros Kostic | Analytical time-like geodesics | 15 pages, 10 figures, accepted by General Relativity and Gravitation | General Relativity and Gravitation 44 (2012) 1057-1072 | 10.1007/s10714-012-1328-5 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time-like orbits in Schwarzschild space-time are presented and classified in
a very transparent and straightforward way into four types. The analytical
solutions to orbit, time, and proper time equations are given for all orbit
types in the form r=r(\lambda), t=t(\chi), and \tau=\tau(\chi), where \lambda\
is the true... | [
{
"created": "Thu, 26 Jan 2012 19:28:24 GMT",
"version": "v1"
}
] | 2012-03-13 | [
[
"Kostic",
"Uros",
""
]
] | Time-like orbits in Schwarzschild space-time are presented and classified in a very transparent and straightforward way into four types. The analytical solutions to orbit, time, and proper time equations are given for all orbit types in the form r=r(\lambda), t=t(\chi), and \tau=\tau(\chi), where \lambda\ is the true a... |
gr-qc/0401111 | Sean A. Hayward | Sean A. Hayward | Kerr black holes in horizon-generating form | 4 revtex4 pages | Phys.Rev.Lett. 92 (2004) 191101 | 10.1103/PhysRevLett.92.191101 | null | gr-qc | null | New coordinates are given which describe non-degenerate Kerr black holes in
dual-null foliations based on the outer (or inner) horizons, generalizing the
Kruskal form for Schwarzschild black holes. The construction involves an area
radius for the transverse surfaces and a generalization of the Regge-Wheeler
radial fu... | [
{
"created": "Wed, 28 Jan 2004 05:54:06 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Hayward",
"Sean A.",
""
]
] | New coordinates are given which describe non-degenerate Kerr black holes in dual-null foliations based on the outer (or inner) horizons, generalizing the Kruskal form for Schwarzschild black holes. The construction involves an area radius for the transverse surfaces and a generalization of the Regge-Wheeler radial func... |
2201.10941 | Hong Zhang | Shou-Shan Bao, Qi-Xuan Xu, Hong Zhang | Improved Analytic Solution of Black Hole Superradiance | 5 pages, 3 figures, Accepted by PRD | null | 10.1103/PhysRevD.106.064016 | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | The approximate solution of the Klein-Gordon equation for a real scalar field
of mass $\mu$ in the geometry of a Kerr black hole obtained by Detweiler
\cite{Detweiler:1980uk} is widely used in the analysis of the stability of
black holes as well as the search of axion-like particles. In this work, we
confirm a missin... | [
{
"created": "Tue, 25 Jan 2022 05:00:57 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Aug 2022 12:27:10 GMT",
"version": "v2"
}
] | 2022-09-21 | [
[
"Bao",
"Shou-Shan",
""
],
[
"Xu",
"Qi-Xuan",
""
],
[
"Zhang",
"Hong",
""
]
] | The approximate solution of the Klein-Gordon equation for a real scalar field of mass $\mu$ in the geometry of a Kerr black hole obtained by Detweiler \cite{Detweiler:1980uk} is widely used in the analysis of the stability of black holes as well as the search of axion-like particles. In this work, we confirm a missing ... |
1702.07380 | Amir Hadi Ziaie | Hamid Shabani and Amir Hadi Ziaie | Consequences of energy conservation violation: Late time solutions of
$\Lambda(T) CDM$ subclass of $f(R,T)$ gravity using dynamical system approach | 27 pages, 4 figures | Eur. Phys. J. C 77:282 (2017) | 10.1140/epjc/s10052-017-4844-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Very recently, the authors of [PRL {\bf 118} (2017) 021102] have shown that
violation of energy-momentum tensor (EMT) could result in an accelerated
expansion state via appearing an effective cosmological constant, in the
context of unimodular gravity. Inspired by this outcome, in this paper we
investigate cosmologic... | [
{
"created": "Thu, 23 Feb 2017 20:26:06 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Feb 2017 16:07:50 GMT",
"version": "v2"
},
{
"created": "Fri, 5 May 2017 17:42:13 GMT",
"version": "v3"
}
] | 2017-05-24 | [
[
"Shabani",
"Hamid",
""
],
[
"Ziaie",
"Amir Hadi",
""
]
] | Very recently, the authors of [PRL {\bf 118} (2017) 021102] have shown that violation of energy-momentum tensor (EMT) could result in an accelerated expansion state via appearing an effective cosmological constant, in the context of unimodular gravity. Inspired by this outcome, in this paper we investigate cosmological... |
2110.15351 | Sashwat Tanay Dr. | Sashwat Tanay, Gihyuk Cho, Leo C. Stein | Action-angle variables of a binary black-hole with arbitrary
eccentricity, spins, and masses at 1.5 post-Newtonian order | 26 pages, 6 figures | Phys. Rev. D 107, 103040 (2023) | 10.1103/PhysRevD.107.103040 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accurate and efficient modeling of the dynamics of binary black holes (BBHs)
is crucial to their detection through gravitational waves (GWs), with
LIGO/Virgo/KAGRA, and LISA in the future. Solving the dynamics of a BBH system
with arbitrary parameters without simplifications (like orbit- or
precession-averaging) in c... | [
{
"created": "Thu, 28 Oct 2021 17:58:41 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Sep 2022 15:02:57 GMT",
"version": "v2"
},
{
"created": "Tue, 23 May 2023 15:07:29 GMT",
"version": "v3"
}
] | 2023-05-24 | [
[
"Tanay",
"Sashwat",
""
],
[
"Cho",
"Gihyuk",
""
],
[
"Stein",
"Leo C.",
""
]
] | Accurate and efficient modeling of the dynamics of binary black holes (BBHs) is crucial to their detection through gravitational waves (GWs), with LIGO/Virgo/KAGRA, and LISA in the future. Solving the dynamics of a BBH system with arbitrary parameters without simplifications (like orbit- or precession-averaging) in clo... |
gr-qc/9710084 | Jose Acacio de Barros | J. Acacio de Barros (UFJF/Brazil), N. Pinto-Neto (CBPF/Brazil), M. A.
Sagioro-Leal (UFJF/Brazil) | The Causal Interpretation of Dust and Radiation Fluids Non-Singular
Quantum Cosmologies | 10 pages, LaTeX, 5 figures in postscript, requires epsf | Phys.Lett. A241 (1998) 229-239 | 10.1016/S0375-9601(98)00169-8 | null | gr-qc quant-ph | null | We apply the causal interpretation of quantum mechanics to homogeneous and
isotropic quantum cosmology where the sources of the gravitational field are
either dust or radiation perfect fluids. We find non-singular quantum
trajectories which tends to the classical one when the scale factor becomes
much larger then the... | [
{
"created": "Fri, 17 Oct 1997 14:07:17 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"de Barros",
"J. Acacio",
"",
"UFJF/Brazil"
],
[
"Pinto-Neto",
"N.",
"",
"CBPF/Brazil"
],
[
"Sagioro-Leal",
"M. A.",
"",
"UFJF/Brazil"
]
] | We apply the causal interpretation of quantum mechanics to homogeneous and isotropic quantum cosmology where the sources of the gravitational field are either dust or radiation perfect fluids. We find non-singular quantum trajectories which tends to the classical one when the scale factor becomes much larger then the P... |
1905.04136 | Ritabrata Biswas | Siddhartha Sankar Sarkar and Ritabrata Biswas | Pseudo Newtonian Potential For a Rotating Kerr Black Hole Embedded in
Quintessence | 108 figures | Eur. Phys. J. C (2019) 79:380 | 10.1140/epjc/s10052-019-6884-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pseudo-Newtonian Potential has always been a useful tool to discuss the
motion of a particle in space-time to avoid the tedious and nearly impossible
nonlinear computations coming from the field equations of general relativity.
Mukhopadhyay, in 2002, has introduced such a pseudo-Newtonian potential for
rotating Kerr ... | [
{
"created": "Thu, 9 May 2019 03:32:49 GMT",
"version": "v1"
}
] | 2019-05-13 | [
[
"Sarkar",
"Siddhartha Sankar",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | Pseudo-Newtonian Potential has always been a useful tool to discuss the motion of a particle in space-time to avoid the tedious and nearly impossible nonlinear computations coming from the field equations of general relativity. Mukhopadhyay, in 2002, has introduced such a pseudo-Newtonian potential for rotating Kerr bl... |
2403.12522 | Pramit Rej | Pramit Rej | Hybrid star within $f(\mathcal{G})$ gravity | 15 pages, 8 figures, 2 tables | Chinese Journal of Physics 89, 174-186 (2024) | 10.1016/j.cjph.2024.02.052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this work is to investigate some interesting features of a
static anisotropic relativistic stellar object composed of two different types
of fluid distributions typically termed as quark matter (QM) and ordinary
baryonic matter (OBM) together with Krori-Barua type (KB) {\em ansatz} in the
regime of mod... | [
{
"created": "Tue, 19 Mar 2024 07:46:03 GMT",
"version": "v1"
}
] | 2024-03-20 | [
[
"Rej",
"Pramit",
""
]
] | The purpose of this work is to investigate some interesting features of a static anisotropic relativistic stellar object composed of two different types of fluid distributions typically termed as quark matter (QM) and ordinary baryonic matter (OBM) together with Krori-Barua type (KB) {\em ansatz} in the regime of modif... |
gr-qc/9502019 | Robin W. Tucker | T Dereli, M Onder, Robin W Tucker | Solutions for Neutral for Axi-Dilaton Gravity in 4-Dimensions | 7 pages Plain Tex (No Figures), Letter to Editor, Classical and
Quantum Gravity | Class.Quant.Grav.12:L25-L30,1995 | 10.1088/0264-9381/12/4/001 | null | gr-qc | null | We examine a 1 parameter class of actions describing the gravitational
interaction between a pair of scalar fields and Einsteinian gravitation. When
the parameter is positive the theory corresponds to an axi-dilatonic sector of
low energy string theory. We exploit an SL(2,R) symmetry of the theory to
construct a fami... | [
{
"created": "Wed, 8 Feb 1995 15:50:38 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Dereli",
"T",
""
],
[
"Onder",
"M",
""
],
[
"Tucker",
"Robin W",
""
]
] | We examine a 1 parameter class of actions describing the gravitational interaction between a pair of scalar fields and Einsteinian gravitation. When the parameter is positive the theory corresponds to an axi-dilatonic sector of low energy string theory. We exploit an SL(2,R) symmetry of the theory to construct a family... |
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