Current transport and mass separation for an asymmetric fluctuation system with correlated noises

doi:10.1088/1674-1056/27/1/010501

Abstract We discuss the transport of an underdamped particle driven by an external fluctuation force in a spatially periodic asymmetric potential with correlated noises. The corresponding mathematical model is established. The movement of the steady current of an underdamped particle is presented by the method of the numerical simulation. It is indicated that the value of the current may be negative, zero, or positive. The external fluctuation force and correlated noises can effect the current direction. Under the appropriate parameters, the correlated noises intensity may even raise a reversal of the current. Besides, we have noticed a phenomenon that particles with different weight have different directions during movement by the impact of the correlated noises and external fluctuation force. Therefore, the Brownian particles can be effectively separated according to their masses.

Keywords: current transport correlated noises fluctuation force Brownian motion

Received: 05 June 2017
Revised: 06 October 2017
Accepted manuscript online:

PACS:	05.40.-a	(Fluctuation phenomena, random processes, noise, and Brownian motion)
	02.50.Ey	(Stochastic processes)

Fund: Projected supported by the National Natural Science Foundation of China (Grant No. 11202120) and the Fundamental Research Funds for the Central Universities of China (Grant Nos. GK201502007 and GK201701001).

Corresponding Authors: Li-Juan Ning
E-mail: ninglijuan@snnu.edu.cn

Cite this article:

Jie Wang(王杰), Li-Juan Ning(宁丽娟) Current transport and mass separation for an asymmetric fluctuation system with correlated noises 2018 Chin. Phys. B 27 010501

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