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Motion of an active particle with dynamical disorder
Journal
Soft Matter
ISSN
1744683X
Date Issued
2022-02-21
Author(s)
Goswami, Koushik
Chakrabarti, Rajarshi
Abstract
We propose a model for investigating the motion of a single active particle in a heterogeneous environment where the heterogeneity may arise due to crowding, conformational fluctuations and/or slow rearrangement of the surroundings. Describing the active particle in terms of the Ornstein-Uhlenbeck process (OUP) and incorporating heterogeneity in a thermal bath using two separate models, namely “diffusing diffusivity” and “switching diffusion”, we explore the essential dynamical properties of the particle for its one-dimensional motion. In addition, we show how the dynamical behavior is controlled by dynamical variables associated with active noise such as strength and persistence time. Our model is relevant in the context of single particle dynamics in a crowded environment, driven by activity.
Volume
18
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