Single file diffusion enhancement in a fluctuating modulated quasi-1D channelG. Coupier, M. Saint Jean and C. Guthmann
Laboratoire Matière et Systèmes Complexes-CNRS & Université Paris 7 - 140 rue de Lourmel, 75015 Paris, France
received 23 October 2006; accepted in final form 25 January 2007; published March 2007
published online 28 February 2007
We show that the diffusion of a single file of particles moving in a fluctuating modulated quasi-1D channel is enhanced with respect to the one in a bald pipe. This effect, induced by the fluctuations of the modulation, is favoured 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 patterns of pinning sites.
05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.
© Europhysics Letters Association 2007