title: Communication: Turnover behavior of effective mobility in a tube with periodic entropy potential.
abstract: Using Brownian dynamics simulations, we study the effective mobility and diffusion coefficient of a point particle in a tube formed from identical compartments of varying diameter, as functions of the driving force applied along the tube axis. Our primary focus is on how the driving force dependences of these transport coefficients are modified by the changes in the compartment shape. In addition to monotonically increasing or decreasing behavior of the effective mobility in periodic entropy potentials reported earlier, we now show that the effective mobility can even be nonmonotonic in the driving force.
authors.affiliation: Division of Computational Bioscience, Center for Information Technology, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Dagdug
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Berezhkovskii
authors.forename: Yurii A
authors.initials: YA
authors.lastname: Makhnovskii
authors.forename: Vladimir Yu
authors.initials: VY
authors.lastname: Zitserman
authors.forename: Sergey M
authors.initials: SM
authors.lastname: Bezrukov
mesh_terms: D004058:Diffusion; D019277:Entropy; D056004:Molecular Dynamics Simulation; D010316:Particle Size