2021/12/31 by Koushik Goswami, Rajarshi Chakrabarti
Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Classical mechanics #Context (archaeology) #Diffusion #Material Dynamics and Properties #Motion (physics) #Particle (ecology) #Physics #Statistical physics #Thermal #Thermal diffusivity #Thermodynamics #cond-mat.soft #cond-mat.stat-mech #stochastic dynamics and bifurcation
paper · pdf · doi:10.1039/d1sm01816g
to appear in Soft Matter
openalex publication_date 2022/01/01 · arxiv created 2022/03/03 · arxiv updated 2022/03/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a model for the motion of a single active particle in a heterogeneous environment where the heterogeneity may arise due to the crowding, conformational fluctuations and/or slow rearrangement of the surroundings. Describing the active particle in terms of the Ornstein-Uhlenbeck process (OUP) and incorporating the heterogeneity in the thermal bath using the 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 two timescales, namely diffusive time and persistence time. Our model is relevant in the context of single particle dynamics in crowded environment, driven by activity.