Ratchet motion and current motors in pulsating reversal of coupled Brownian symmetric potentials

作     者：Chen-Pu Li Hong-Bin Chen Zhi-Gang Zheng 

作者机构：Department of Physics Beijing Normal University Beijing 100875 China College of Science Hebei University of Architecture Zhangjiakou 075000 China Institute of Systems Science (ISS) Huaqiao University Xiamen 361021 China College of Information Science and Engineering Huaqiao University Xiamen 361021 China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2017年第12卷第4期

页      面：197-206页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：This work was partially supported by the National Natural Science Foundation of China (Grant Nos. 11075016 and 11475022) and the Scientific Research Funds of Huaqiao University 

主　　题：coupled Brownian motors ratchet effective potential symmetric periodic potential noise 

摘      要：In this study, we investigate the collective directed transport of coupled Brownian particles in spatially symmetric periodic potentials under time-periodic pulsating modulations. We find that the coupling between two particles can induce symmetry breaking and consequently collective directed motion. Moreover, the direction of motion can be reversed under certain conditions. The dependence of directed current on various parameters is systematically studied, reverse motion can be achieved by modulating the coupling free length and the phase shift of tile pulsating potential. The dynamical mechanism of these transport properties is understood in terms of the effective-potential theory and the space-time transformation invariance. The directed transport of coupled Brownian motors can be maniplflated and optimized by adjusting the coupling strength, pulsating frequency, or noise intensity.