Collective particle transport in a peristaltic ratchet system

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

Dierl, Marcel^1 ; Einax, Mario^1 ; Chvosta, Petr^2 ; Dieterich, Wolfgang^3 ; Maass, Philipp^1

Fachbereich Physik, Universität Osnabrück, Barbarastraße 7, 49076 Osnabrück, Germany^1

Department of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holeovikách 2, CZ-180 00 Praha, Czech Republic^2

Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany^3

关键词: Collective transport;    Interaction strength;    Markov chain approaches;    Maximum Efficiency;    Modulation period;    Nearest-neighbor interactions;    Particle transport;    Transport efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012184/pdf
DOI  :  10.1088/1742-6596/490/1/012184

来源: IOP

【 摘 要 】

We consider particles with repulsive nearest-neighbor interactions in a periodically modulated tilted-sine potential as a model for a peristaltic ratchet system. Using the Markov chain approach to kinetics (MCAK), the collective transport behavior is investigated with respect to the modulation period, interaction strength, and applied mechanical bias (tilt amplitude). In the stationary state, a maximum is found in the period-averaged particle current and transport efficiency as function of both the mechanical bias and the modulation period. The efficiency can be enhanced when the interaction strength is increased. While the maximal current arises for fast modulation, maximum efficiency is obtained for comparatively slow modulation.