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


Change log
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)