Stochastic Resonance and Ratchets: Two Closely Related Phenomena in Brownian Motors

Chin. Phys. Lett.

2003, Vol. 20

Issue (6): 810-812 DOI:

Original Articles

Stochastic Resonance and Ratchets: Two Closely Related Phenomena in Brownian Motors

QIAN Min¹;WANG Yan¹;ZHANG Xue-Juan^1,2

¹Key Laboratory of Pure and Applied Mathematics, School of Mathematical Sciences, Peking University, Beijing 100871 ²Department of Mathematics, Shaoxing College of Arts and Sciences, Shaoxing 312000

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QIAN Min, WANG Yan, ZHANG Xue-Juan 2003 Chin. Phys. Lett. 20 810-812

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Abstract Ratchet effect as well as the phenomenon of stochastic resonance (SR) is investigated in a simple flashing ratchet model. Numerical simulations show that both the power spectrum amplitude and the mean mobility of the system vary non-monotonically in similar manners with the increase of the noise intensity and both reach their highest point nearly at the same noise level. We point out that the consistency of these two phenomena are just due to the existence of circular flux in non-equilibrium state.

Keywords: 05.40.-a 87.10.+e

Published: 01 June 2003

PACS:	05.40.-a	(Fluctuation phenomena, random processes, noise, and Brownian motion)
	87.10.+e

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2003/V20/I6/0810

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