Frontiers of Physics

, 12:120507

Double-temperature ratchet model and current reversal of coupled Brownian motors

Research article

DOI: 10.1007/s11467-017-0659-9

Cite this article as:
Li, CP., Chen, HB. & Zheng, ZG. Front. Phys. (2017) 12: 120507. doi:10.1007/s11467-017-0659-9
  • 28 Downloads

Abstract

On the basis of the transport features and experimental phenomena observed in studies of molecular motors, we propose a double-temperature ratchet model of coupled motors to reveal the dynamical mechanism of cooperative transport of motors with two heads, where the interactions and asynchrony between two motor heads are taken into account. We investigate the collective unidirectional transport of coupled system and find that the direction of motion can be reversed under certain conditions. Reverse motion can be achieved by modulating the coupling strength, coupling free length, and asymmetric coefficient of the periodic potential, which is understood in terms of the effective potential theory. The dependence of the directed current on various parameters is studied systematically. Directed transport of coupled Brownian motors can be manipulated and optimized by adjusting the pulsation period or the phase shift of the pulsation temperature.

Keywords

coupled Brownian motors ratchet model effective potential noise 

Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of PhysicsBeijing Normal UniversityBeijingChina
  2. 2.College of ScienceHebei University of ArchitectureZhangjiakouChina
  3. 3.Institute of Systems Science (ISS)Huaqiao UniversityXiamenChina
  4. 4.College of Information Science and EngineeringHuaqiao UniversityXiamenChina

Personalised recommendations