Lévy Walk Dynamics in an External Constant Force Field in Non-Static Media

Overview

Journal J Stat Phys

Date 2022 Mar 7

PMID 35250092

Authors

Tian Zhou

Pengbo Xu

Weihua Deng

Affiliations

Soon will be listed here.

Abstract

Based on the recognition of the huge change of the transport properties for diffusion particles in non-static media, we consider a Lévy walk model subjected to an external constant force in non-static media. Since the physical and comoving coordinates of non-static media are related by scale factor, we equivalently transfer the process from physical coordinate into comoving coordinate and derive the master equation governing the probability density function of the position of the particles in comoving coordinate. Utilizing the Hermite orthogonal polynomial expansions, some statistical properties are obtained, including the asymptotic behaviors of the first two moments in both coordinates and kurtosis. For some representative types of non-static media and Lévy walks, the striking and interesting phenomena originating from the interplay between non-static media, external force, and intrinsic stochastic motion are observed. The stationary distribution are also analyzed for some cases through numerical simulations.

Citing Articles

Lévy Walk Dynamics in an External Constant Force Field in Non-Static Media.

Zhou T, Xu P, Deng W J Stat Phys. 2022; 187(1):9.

PMID: 35250092 PMC: 8883250. DOI: 10.1007/s10955-022-02904-8.

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