Transport and diffusion of active Brownian particles in symmetric corrugated deformable geometries: Inertial effects and rectification power

This work examines the transport and diffusion of active Brownian particles with mass inside deformable symmetric structures under the influence of a constant external force. By adjusting the shape parameter r in the interval ranging −1 to 1(−1<r<1), which permits various configurations of the channel, we detect a notable symmetry in mobility. Significant particle masses impose limitations on the average velocity, mobility, and diffusion coefficient, demonstrating a tendency to cancel out these factors, notwithstanding substantial self-propulsion, external forces, and there is a rectification. The existence of extensively open pores and considerable channel wells, coupled with fewer constrictive geometries, increases the mean velocity and nonlinear mobility, but the effective diffusion coefficient diminishes in the absence of bottlenecks. Peaks indicate mass levels that optimize mean velocity. Our results demonstrate that the rectification power of self-propelled particles is reduced owing to their substantial masses and is maximized in ideal geometries.