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Cooperation and competition between two symmetry breakings in a coupled ratchet

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

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.

Suggested Citation

  • Li, Chen-Pu & Chen, Hong-Bin & Fan, Hong & Xie, Ge-Ying & Zheng, Zhi-Gang, 2018. "Cooperation and competition between two symmetry breakings in a coupled ratchet," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 494(C), pages 175-185.
    • Handle: RePEc:eee:phsmap:v:494:y:2018:i:c:p:175-185
    DOI: 10.1016/j.physa.2017.11.161
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    References listed on IDEAS

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