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Anomalous Stochastic Transport of Particles with Self-Reinforcement and Mittag-Leffler Distributed Rest Times

Published version
Peer-reviewed

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Authors

Alexandrov, Dmitri V  ORCID logo  https://orcid.org/0000-0002-6628-745X
Gavrilova, Anna 
Fedotov, Sergei 

Abstract

jats:pWe introduce a persistent random walk model for the stochastic transport of particles involving self-reinforcement and a rest state with Mittag–Leffler distributed residence times. The model involves a system of hyperbolic partial differential equations with a non-local switching term described by the Riemann–Liouville derivative. From Monte Carlo simulations, we found that this model generates superdiffusion at intermediate times but reverts to subdiffusion in the long time asymptotic limit. To confirm this result, we derived the equation for the second moment and find that it is subdiffusive in the long time limit. Analyses of two simpler models are also included, which demonstrate the dominance of the Mittag–Leffler rest state leading to subdiffusion. The observation that transient superdiffusion occurs in an eventually subdiffusive system is a useful feature for applications in stochastic biological transport.</jats:p>

Description

Keywords

anomalous stochastic transport, self-reinforcement, subdiffusion, Mittag-Leffler distributed rest state

Journal Title

FRACTAL AND FRACTIONAL

Conference Name

Journal ISSN

2504-3110
2504-3110

Volume Title

5

Publisher

MDPI AG
Sponsorship
EPSRC (EP/V008641/1)