Current Reversals and Synchronization in Coupled Ratchets

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.

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

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Cited by in corpus (8)

• The Persistence of Uphill Anomalous Transport in Inhomogeneous Media
• Dimer motion on a periodic substrate: Spontaneous symmetry breaking and absolute negative mobility
• Current inversion in a periodically driven two-dimensional Brownian ratchet
• Cooperative surmounting of bottlenecks
• Optimal ratchet current for elastically interacting particles
• Multidimensional Washboard Ratchet Potentials for Frustrated Two-Dimensional Josephson-Junctions Arrays on square lattices
• Chaos in Kicked Ratchets
• Current reversals in driven lattice gases and Brownian motion