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arXiv · 0908.3051

Current Reversals and Synchronization in Coupled Ratchets

U. E. Vincent·A. Kenfack·D. V. Senthilkumar·D. Mayer·J. Kürths
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Abstract

Current reversal is an intriguing phenomenon that has been central to recent experimental and theoretical investigations of transport based on ratchet mechanism. By considering a system of two interacting ratchets, we demonstrate how the coupling can be used to control the reversals. In particular, we find that current reversal that exists in a single driven ratchet system can ultimately be eliminated with the presence of a second ratchet. For specific coupling strengths a current-reversal free regime has been detected. Furthermore, in the fully synchronized state characterized by the coupling threshold $k_{th}$, a specific driving amplitude $a_{opt}$ is found for which the transport is optimum.

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U. E. Vincent, A. Kenfack, D. V. Senthilkumar, D. Mayer, J. Kürths. 2009-08-21. Current Reversals and Synchronization in Coupled Ratchets. https://doi.org/10.1103/physreve.82.046208

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