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

作　　者：赵阿可 张红卫 李玉晓 

机构地区：[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]Department of Physics, Zhengzhou Normal University, Zhengzhou 450044, China

出　　处：《Chinese Physics B》2010年第11期174-178,共5页中国物理B（英文版）

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.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.

关 键 词：Brownian motors RATCHET CURRENT EFFICIENCY 

分 类 号：O552.1[理学—热学与物质分子运动论] TP273[理学—物理]