title: Transport driven by spatially modulated noise in a periodic tube.
abstract: This paper investigates a three-dimensional periodic tube driven by spatially modulated Gaussian white noise. We derive an analytical expression for the net current by introducing entropic barriers. It is found that the phase shift between the entirely symmetric tube and noise modulation can break the symmetry of the generalized potential and induce directed transport. The sign of the current is determined by the phase shift. The current is a peaked function of the bottleneck radius. The interplay between the asymmetric tube and noise modulation can also induce a net current.
authors.affiliation: Institute for Condensed Matter Physics, School of Physics and Telecommunication Engineering and Laboratory of Photonic Information Technology, South China Normal University, 510006 Guangzhou, People's Republic of China.
authors.forename: Bao-Quan
authors.initials: BQ
authors.lastname: Ai
authors.forename: Liang-Gang
authors.initials: LG
authors.lastname: Liu