Single File D iffusion enhancement in a fluctuating modulated 1D channel

Gwennou Coupier (1) , Michel Saint-Jean (1) , Claudine Guthmann (1)

1 MSC - Matière et Systèmes Complexes

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.

Domaines: Biomécanique [physics.med-ph]

Gwennou Coupier, Michel Saint-Jean, Claudine Guthmann. Single File D iffusion enhancement in a fluctuating modulated 1D channel. EPL - Europhysics Letters, 2007, 77 (6), pp.60001. ⟨10.1209/0295-5075/77/60001⟩. ⟨hal-00169705⟩