Cooperation and competition between two symmetry breakings in a coupled ratchet

Chen-Pu Li, Hong-Bin Chen, Hong Fan, Ge-Ying Xie and Zhi-Gang Zheng

Physica A: Statistical Mechanics and its Applications, 2018, vol. 494, issue C, 175-185

Abstract: We investigate the collective mechanism of coupled Brownian motors in a flashing ratchet in the presence of coupling symmetry breaking and space symmetry breaking. The dependences of directed current on various parameters are extensively studied in terms of numerical simulations and theoretical analysis. Reversed motion can be achieved by modulating multiple parameters including the spatial asymmetry coefficient, the coupling asymmetry coefficient, the coupling free length and the coupling strength. The dynamical mechanism of these transport properties can be reasonably explained by the effective potential theory and the cooperation or competition between two symmetry breakings. Moreover, adjusting the Gaussian white noise intensity, which can induce weak reversed motion under certain condition, can optimize and manipulate the directed transport of the ratchet system.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:494:y:2018:i:c:p:175-185

DOI: 10.1016/j.physa.2017.11.161

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