Diffusion of active Brownian particles under quenched disorder

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 no...

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Bibliographic Details
Published in:PloS one 2024-03, Vol.19 (3), p.e0298466-e0298466
Main Authors: Zhao, Xiong-Biao, Zhang, Xiao, Guo, Wei
Format: Article
Language:English
Subjects:
Absorption
Analysis
Biology and Life Sciences
Computer and Information Sciences
Diffusion
Distribution (Probability theory)
Engineering and Technology
Evaluation
Medical research
Medicine, Experimental
Motion
Nonlinear Dynamics
Physical Sciences
Probability
Proteins
Running
Social Sciences
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Summary: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.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0298466