Single File Diffusion enhancement in a fluctuating modulated 1D channel

TL;DR

This paper demonstrates that fluctuations in a modulated 1D channel can enhance the diffusion of particles in a single file, especially when the channel's potential modulation is incommensurate with the particle arrangement.

Contribution

It introduces the concept that channel fluctuations can increase diffusion in single-file systems, with potential applications in optimizing superconductor critical currents.

Findings

Diffusion is enhanced by channel fluctuations.

Incommensurability between potential and particle periodicity favors diffusion.

Potential implications for superconductor vortex dynamics.

Abstract

We show that the diffusion of a single file of particles moving in a fluctuating modulated 1D channel is enhanced with respect to the one in a bald pipe. This effect, induced by the fluctuations of the modulation, is favored by the incommensurability between the channel potential modulation and the moving file periodicity. This phenomenon could be of importance in order to optimize the critical current in superconductors, in particular in the case where mobile vortices move in 1D channels designed by adapted patterns of pinning sites.