Diffusion of active Brownian particles under quenched disorder

Author:

Zhao Xiong-BiaoORCID,Zhang Xiao,Guo WeiORCID

Abstract

The motion of a single active particle in one dimension with quenched disorder under the external force is investigated. Within the tailored parameter range, anomalous diffusion that displays weak ergodicity breaking is observed, i.e., non-ergodic subdiffusion and non-ergodic superdiffusion. This non-ergodic anomalous diffusion is analyzed through the time-dependent probability distributions of the particle’s velocities and positions. Its origin is attributed to the relative weights of the locked state (predominant in the subdiffusion state) and running state (predominant in the superdiffusion state). These results may contribute to understanding the dynamical behavior of self-propelled particles in nature and the extraordinary response of nonlinear dynamics to the externally biased force.

Funder

the National Natural Science Foundation of China

the Yunnan Province Applied Basic Research Project

the Graduate Program of Scientific Research Foundation of Yunnan Education Department

the Program for Frontier Research Team of Kunming University 2023

the Xingdian Talent Support Project

the Young Top-notch Talent of Kunming

the Program for Innovative Research Team at Kunming University

Publisher

Public Library of Science (PLoS)

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