Directed Current Induced by an Symmetrically ac Force Coexisting with a Time-Delayed Feedback
作者： Shu-Ting Yi , Hui Song , Zhi-E Ou , Bao-Quan Ai , Jian-Wen Xiong
DOI: 10.1088/0253-6102/57/2/11
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摘要: We study the transport of overdamped Brownian particles in a symmetrically periodic potential presence an asymmetrically ac driving force and time-delayed feedback. It is found that for low frequencies, average velocity can be negative by changing amplitude, high there exists optimized amplitude at which takes its maximum value. Additionally, threshold value below no directed obtained frequencies. For large delay time, independent time.
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