TITLE:
Multidimensional Effects on Diffusion of a Particle in Tilted Periodic Potentials
AUTHORS:
Huanhuan Luo, Zhanwu Bai
KEYWORDS:
Surface Diffusion, Tilted Periodic Potential, Dimensionality, Langevin Simulation
JOURNAL NAME:
Journal of Modern Physics,
Vol.12 No.14,
December
22,
2021
ABSTRACT: This study investigates the diffusive motion of a Brownian particle in a 2D tilted periodic potential, where bias force is exerted in the x direction. The dimension effect is revealed by simulating the Langevin equation. The diffusion coefficient in x and y directions is a nonmonotonic function of the bias force, and a massive enhancement is observed in x and y directions in comparison with the case without a tilt in x direction. The underlying physical mechanism is explored.