中国物理B ›› 2012, Vol. 21 ›› Issue (7): 78701-078701.doi: 10.1088/1674-1056/21/7/078701

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

A feedback controlled Brownian ratchet operated by temperature switch

张红卫a b, 文书堂c, 张海涛a, 李玉晓a, 陈改荣c   

  1. a School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China;
    b Department of Physics, Zhengzhou Normal University, Zhengzhou 450044, China;
    c School of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, China
  • 收稿日期:2012-03-10 修回日期:2012-04-05 出版日期:2012-06-01 发布日期:2012-06-01
  • 基金资助:
    Project supported by the Educational Commission of Henan Province, China (Grant No. 2006140015) and the Science and Technology Planning Project of Henan Province, China (Grant No. 092300410142).

A feedback controlled Brownian ratchet operated by temperature switch

Zhang Hong-Wei(张红卫)a)b), Wen Shu-Tang(文书堂)c)†, Zhang Hai-Tao(张海涛)a), Li Yu-Xiao(李玉晓)a), and Chen Gai-Rong(陈改荣)c)   

  1. a School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China;
    b Department of Physics, Zhengzhou Normal University, Zhengzhou 450044, China;
    c School of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, China
  • Received:2012-03-10 Revised:2012-04-05 Online:2012-06-01 Published:2012-06-01
  • Contact: Wen Shu-Tang E-mail:wensttnn@163.com
  • Supported by:
    Project supported by the Educational Commission of Henan Province, China (Grant No. 2006140015) and the Science and Technology Planning Project of Henan Province, China (Grant No. 092300410142).

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摘要： In this paper, we present a model of the Brownian motor in a feedback controlled ratchet, in which the application of the flashing potential depends on the state of the particle to be controlled. We derive an analytical expression for the velocity induced by the feedback ratchet, which is a function of several parameters, including the ratio of the two switching temperatures and the asymmetry parameter of the potential field. The motor shows a current inversion when either parameter is varied.

关键词: feedback, temperature switch, asymmetry parameter

Abstract: In this paper, we present a model of the Brownian motor in a feedback controlled ratchet, in which the application of the flashing potential depends on the state of the particle to be controlled. We derive an analytical expression for the velocity induced by the feedback ratchet, which is a function of several parameters, including the ratio of the two switching temperatures and the asymmetry parameter of the potential field. The motor shows a current inversion when either parameter is varied.

Key words: feedback, temperature switch, asymmetry parameter

中图分类号:  (Structure of biomolecules)

  • 87.15.B-
87.15.H- (Dynamics of biomolecules) 87.15.R- (Reactions and kinetics) 87.15.La (Mechanical properties)