Current Reversals and Synchronization in Coupled Ratchets

Details Current Reversals and Synchronization in Coupled Ratchets Current Reversals and Synchronization in Coupled Ratchets

2009-08-21

arxiv.org/abs/0908.3051v2

Nonlinear Sciences

Chaotic Dynamics

6 pages, 8 figures. To appear in Physical Review E

Scientific paper

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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