Feedback control of two-headed Brownian motors in flashing ratchet potential

doi:10.1088/1674-1056/19/11/110506

中国物理B ›› 2010, Vol. 19 ›› Issue (11): 110506-110509.doi: 10.1088/1674-1056/19/11/110506

Feedback control of two-headed Brownian motors in flashing ratchet potential

赵阿可¹, 李玉晓², 张红卫³

(1)College of Physics and Electric Information, Luoyang Normal University, Luoyang 471022, China; (2)School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China; (3)School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China; Department of Physics, Zhengzhou Normal University, Zhengzhou 450044, China

收稿日期:2010-03-31 修回日期:2010-06-21 出版日期:2010-11-15 发布日期:2010-11-15

Feedback control of two-headed Brownian motors in flashing ratchet potential

Zhao A-Ke(赵阿可)^a)†, Zhang Hong-Wei(张红卫)^b)c), and Li Yu-Xiao(李玉晓)^b)

^a College of Physics and Electric Information, Luoyang Normal University, Luoyang 471022, China; ^b School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, China; ^c Department of Physics, Zhengzhou Normal University, Zhengzhou 450044, China

Received:2010-03-31 Revised:2010-06-21 Online:2010-11-15 Published:2010-11-15

摘要/Abstract

摘要： We presented a detailed investigation on the movement of two-headed Brownian motors in an asymmetric potential under a feedback control. By numerical simulations the direct current is obtained. The current is periodic in the initial length of spring. There is an optimal value of the spring constant. And the dependence of the current on the opposing force is reversed. Then we found that when the change of the temperature and the opposing force have optimal values, the Brownian motors can also obtain the optimal efficiency.

Abstract: We presented a detailed investigation on the movement of two-headed Brownian motors in an asymmetric potential under a feedback control. By numerical simulations the direct current is obtained. The current is periodic in the initial length of spring. There is an optimal value of the spring constant. And the dependence of the current on the opposing force is reversed. Then we found that when the change of the temperature and the opposing force have optimal values, the Brownian motors can also obtain the optimal efficiency.

Key words: Brownian motors, ratchet, current, efficiency

中图分类号: (Proteins)

87.14.E-

87.16.A- (Theory, modeling, and simulations) 87.16.Nn (Motor proteins (myosin, kinesin dynein))

赵阿可, 张红卫, 李玉晓. Feedback control of two-headed Brownian motors in flashing ratchet potential[J]. 中国物理B, 2010, 19(11): 110506-110509.

Zhao A-Ke(赵阿可), Zhang Hong-Wei(张红卫), and Li Yu-Xiao(李玉晓). Feedback control of two-headed Brownian motors in flashing ratchet potential[J]. Chin. Phys. B, 2010, 19(11): 110506-110509.

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Feedback control of two-headed Brownian motors in flashing ratchet potential

Feedback control of two-headed Brownian motors in flashing ratchet potential

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