Motion of an active particle with dynamical disorder

Area of Science:

• Physics
• Chemical Physics
• Biophysics

Background:

• Investigating single active particle dynamics is crucial for understanding complex biological and physical systems.
• Environmental heterogeneity, arising from crowding or dynamic changes, significantly impacts particle motion.

Purpose of the Study:

• To develop and analyze a model for single active particle motion in heterogeneous environments.
• To explore the influence of active noise parameters on particle dynamics.

Main Methods:

• Modeling the active particle using the Ornstein-Uhlenbeck process (OUP).
• Incorporating environmental heterogeneity via 'diffusing diffusivity' and 'switching diffusion' models.
• Analyzing one-dimensional motion and dynamical properties.

Main Results:

• The study characterizes essential dynamical properties of the active particle.
• Demonstrated control of dynamical behavior by active noise variables like strength and persistence time.
• The model effectively captures particle motion in heterogeneous thermal baths.

Conclusions:

• The proposed model provides a framework for studying active particle dynamics in crowded and fluctuating environments.
• Understanding the interplay between active noise and environmental heterogeneity is key to predicting particle behavior.
• This research is relevant for single particle tracking and active matter studies.