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Physics Letters A
Article
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zbMATH Open
Article . 2014
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Physics Letters A
Article . 2014 . Peer-reviewed
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https://dx.doi.org/10.48550/ar...
Article . 2014
License: arXiv Non-Exclusive Distribution
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A mixed SOC-turbulence model for nonlocal transport and Lévy-fractional Fokker–Planck equation

A mixed SOC-turbulence model for nonlocal transport and Lévy-fractional Fokker-Planck equation
Authors: Alexander V. Milovanov; Jens Juul Rasmussen;

A mixed SOC-turbulence model for nonlocal transport and Lévy-fractional Fokker–Planck equation

Abstract

The phenomena of nonlocal transport in magnetically confined plasma are theoretically analyzed. A hybrid model is proposed, which brings together the notion of inverse energy cascade, typical of drift-wave- and two-dimensional fluid turbulence, and the ideas of avalanching behavior, associable with self-organized critical (SOC) behavior. Using statistical arguments, it is shown that an amplification mechanism is needed to introduce nonlocality into dynamics. We obtain a consistent derivation of nonlocal Fokker-Planck equation with space-fractional derivatives from a stochastic Markov process with the transition probabilities defined in reciprocal space. The hybrid model observes the Sparre Andersen universality and defines a new universality class of SOC.

11 pages, 2 figures; submitted to Physics Letters A. arXiv admin note: substantial text overlap with arXiv:1307.0387

Keywords

drift-wave turbulence, fractional kinetics, random processes and Lévy flights, FOS: Physical sciences, Statistical mechanics of plasmas, self-organized criticality, Chaotic Dynamics (nlin.CD), Nonlinear Sciences - Chaotic Dynamics, Fokker-Planck equations

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
19
Top 10%
Average
Top 10%
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bronze
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