Abstract
Single file diffusion (SFD) refers to the constrained motion of particles in quasi‐one‐dimensional channel such that the particles are unable to pass each other. Possible SFD of charged dust confined in biharmonic annular potential well with screened Coulomb interaction is investigated. Transition from normal diffusion to anomalous sub‐diffusion behaviors is observed. Deviation from SFD's mean square displacement scaling behavior of 1/2‐exponent may occur in strongly interacting systems. A phenomenological model based on fractional Langevin equation is proposed to account for the anomalous SFD behavior in dusty plasma ring.
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