title: Diffusion in one-dimensional channels with zero-mean time-periodic tilting forces.
abstract: We investigate the motion of overdamped Brownian particles in a one-dimensional channel under a zero-mean time-periodic tilting force F(t). By introducing a simple harmonic signal, strong enhancement of diffusion is possible for relatively large values of the Peclet number. Direct numerical simulations over the corresponding Fokker-Planck equation show that the diffusion enhancement is induced by a type of nonlinear resonance effect involving the tilting force and the density gradient.
authors.affiliation: División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana, Apartado Postal 55-534, México DF 09340, México.
authors.forename: E
authors.initials: E
authors.lastname: Muñoz-Gutiérrez
authors.forename: J
authors.initials: J
authors.lastname: Alvarez-Ramirez
authors.forename: L
authors.initials: L
authors.lastname: Dagdug
authors.forename: G
authors.initials: G
authors.lastname: Espinosa-Paredes
mesh_terms: D004058:Diffusion; D056004:Molecular Dynamics Simulation; D010316:Particle Size