期刊
CHAOS SOLITONS & FRACTALS
卷 135, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chaos.2020.109766
关键词
Correlated noise; Fick-Jacobs equation; Steady current
资金
- National Natural Science Foundation of China [11902118, 11772255]
- Fundamental Research Funds for the Central Universities
- Research Funds for Interdisciplinary subject NWPU
- Shaanxi Project for Distinguished Young Scholars
A system consisting of correlated noises and a channel is analyzed. Via the Fick-Jacobs equation for the system's current evolution, the validity are discussed under three kinds of correlated noise. i) The first case is two Gaussian white noises with a white correlation. We found that in contrast to the single white noise, the white correlation between these two noises breaks the system's symmetry and causes a directed current and the larger the correlation degree, the smaller the current. However, the interaction between the correlation degree and a sinusoidal potential may produce an increasing steady current. ii) The second one is two Gaussian white noises with an exponential correlation. And our results perform that the correlation time between them contributes to a decrease of the steady current. iii) Finally, the case that two Gaussian colored noises with an exponential correlation is investigated. Unlike the former two cases, whether the correlation time comes from the noise itself or the correlation between the two noises, its increase here can always cause an increasing current. (C) 2020 Elsevier Ltd. All rights reserved.
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