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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) |
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 |
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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.
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Received: 10 March 2012
Revised: 05 April 2012
Accepted manuscript online:
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PACS:
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87.15.B-
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(Structure of biomolecules)
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87.15.H-
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(Dynamics of biomolecules)
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87.15.R-
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(Reactions and kinetics)
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87.15.La
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(Mechanical properties)
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| Fund: 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). |
Corresponding Authors:
Wen Shu-Tang
E-mail: wensttnn@163.com
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Cite this article:
Zhang Hong-Wei(张红卫), Wen Shu-Tang(文书堂), Zhang Hai-Tao(张海涛), Li Yu-Xiao(李玉晓), and Chen Gai-Rong(陈改荣) A feedback controlled Brownian ratchet operated by temperature switch 2012 Chin. Phys. B 21 078701
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