Current and efficiency of Brownian particles under oscillating forces in entropic barriers

doi:10.1088/1674-1056/24/4/040501

中国物理B ›› 2015, Vol. 24 ›› Issue (4): 40501-040501.doi: 10.1088/1674-1056/24/4/040501

Current and efficiency of Brownian particles under oscillating forces in entropic barriers

Ferhat Nutku, Ekrem Aydıner

Theoretical Physics Research Group, Department of Physics, Faculty of Science, İstanbul University, Vezneciler, İstanbul, 34134, Turkey

收稿日期:2014-08-16 修回日期:2014-11-11 出版日期:2015-04-05 发布日期:2015-04-05
基金资助:
Project supported by the Funds from Istanbul University (Grant No. 45662).

Current and efficiency of Brownian particles under oscillating forces in entropic barriers

Ferhat Nutku, Ekrem Aydıner

Theoretical Physics Research Group, Department of Physics, Faculty of Science, İstanbul University, Vezneciler, İstanbul, 34134, Turkey

Received:2014-08-16 Revised:2014-11-11 Online:2015-04-05 Published:2015-04-05
Contact: Ferhat Nutku, Ekrem Aydıner E-mail:fnutku@istanbul.edu.tr;ekrem.aydiner@istanbul.edu.tr
Supported by:
Project supported by the Funds from Istanbul University (Grant No. 45662).

摘要/Abstract

摘要： In this study, considering the temporarily unbiased force and different forms of oscillating forces, we investigate the current and efficiency of Brownian particles in an entropic tube structure and present numerically obtained results. We show that different force forms give rise to different current and efficiency profiles in different optimized parameter intervals. We find that an unbiased oscillating force and an unbiased temporal force lead to current and efficiency, which are dependent on these parameters. We also observe that the current and efficiency caused by temporal and different oscillating forces have maximum and minimum values in different parameter intervals. We conclude that the current or efficiency can be controlled dynamically by adjusting the parameters of entropic barriers and applied force.

关键词: entropic barrier, Brownian motion, Fick-Jacobs equation, efficiency of Brownian motor, stochastic processes

Abstract: In this study, considering the temporarily unbiased force and different forms of oscillating forces, we investigate the current and efficiency of Brownian particles in an entropic tube structure and present numerically obtained results. We show that different force forms give rise to different current and efficiency profiles in different optimized parameter intervals. We find that an unbiased oscillating force and an unbiased temporal force lead to current and efficiency, which are dependent on these parameters. We also observe that the current and efficiency caused by temporal and different oscillating forces have maximum and minimum values in different parameter intervals. We conclude that the current or efficiency can be controlled dynamically by adjusting the parameters of entropic barriers and applied force.

Key words: entropic barrier, Brownian motion, Fick-Jacobs equation, efficiency of Brownian motor, stochastic processes

中图分类号: (Brownian motion)

05.40.Jc

05.10.Gg (Stochastic analysis methods) 05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion)

Ferhat Nutku, Ekrem Aydıner. Current and efficiency of Brownian particles under oscillating forces in entropic barriers[J]. 中国物理B, 2015, 24(4): 40501-040501.

Ferhat Nutku, Ekrem Aydıner. Current and efficiency of Brownian particles under oscillating forces in entropic barriers[J]. Chin. Phys. B, 2015, 24(4): 40501-040501.

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Current and efficiency of Brownian particles under oscillating forces in entropic barriers

Current and efficiency of Brownian particles under oscillating forces in entropic barriers

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