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

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

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.

Keywords: entropic barrier Brownian motion Fick-Jacobs equation efficiency of Brownian motor stochastic processes

Received: 16 August 2014
Revised: 11 November 2014
Accepted manuscript online:

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

Fund: Project supported by the Funds from Istanbul University (Grant No. 45662).

Corresponding Authors: Ferhat Nutku, Ekrem Aydıner
E-mail: fnutku@istanbul.edu.tr;ekrem.aydiner@istanbul.edu.tr

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Ferhat Nutku, Ekrem Aydıner Current and efficiency of Brownian particles under oscillating forces in entropic barriers 2015 Chin. Phys. B 24 040501

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

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