Diffusion in a tilted periodic potential with entropic barriers

作者：Liu, Yang^*; Ai, Bao Quan

来源：Journal of Physics: Condensed Matter , 2009, 21(46): 465102.

DOI：10.1088/0953-8984/21/46/465102

• Brownian particles
• Effective diffusion coefficients
• One-dimensional systems
• Periodic channels
• Periodic potentials
• Potential barriers
• Spatial dimensionalities
• Temperature values

Diffusion of Brownian particles in a periodic channel is investigated in the presence of a tilted spatially periodic potential. Reduction of spatial dimensionality from two or three dimensions to an effective one-dimensional system entails the appearance of not only an entropic barrier but also an effective diffusion coefficient. It is found that diffusion exhibits striking features which are different from those observed in the previous cases. The interplay between the potential barriers and entropic barriers makes the phenomena richer. Remarkably, two temperature values exist at which the Peclet number takes its maximum.

• 出版日期2009-11-18
• 单位华南师范大学