Single-file and normal diffusion of magnetic colloids in modulated channels
arXiv:1310.2153 · doi:10.1103/PhysRevE.89.032306
Abstract
Diffusive properties of interacting magnetic dipoles confined in a parabolic narrow channel and in the presence of a periodic modulated (corrugated) potential along the unconfined direction are studied using Brownian dynamics simulations. We compare our simulation results with the analytical result for the effective diffusion coefficient of a single-particle by Festa and d'Agliano [Physica A \textbf{90}, 229 (1978)] and show the importance of inter-particle interaction on the diffusion process. We present results for the diffusion of magnetic dipoles as a function of linear density, strength of the periodic modulation and commensurability factor.
pre-print version, one column, 22 pages, 11 figures, submitted to Phys. Rev. E