Single file diffusion in macroscopic Wigner rings

TL;DR

This paper investigates how charged balls diffuse in a circular channel, revealing that their mean square displacement grows slower than in similar systems, indicating unique subdiffusive behavior.

Contribution

It provides new experimental insights into single file diffusion in macroscopic Wigner rings, showing deviations from classical models and behaviors.

Findings

Mean square displacement is subdiffusive

Diffusion is slower than in colloidal systems

Behavior differs from infinite one-dimensional models

Abstract

The single file diffusion in a circular channel of millimetric charged balls is studied. The evolution in time of the mean square displacement is shown to be subdiffusive, but slower than the power-like $t^{1/2}$ behavior observed in circular colloidal systems or predicted in one-dimensional infinite systems.