Chaotic Transport and Current Reversal in Deterministic Ratchets

Abstract

We address the problem of the classical deterministic dynamics of a particle in a periodic asymmetric potential of the ratchet type. We take into account the inertial term in order to understand the role of the chaotic dynamics in the transport properties. By a comparison between the bifurcation diagram and the current, we identify the origin of the current reversal as a bifurcation from a chaotic to a periodic regime. Close to this bifurcation, we observed trajectories revealing intermittent chaos and anomalous deterministic diffusion.

(7 figures) To appear in Physical Review Letters (in January 2000)

References in corpus (2)

• Reducing vortex density in superconductors using the ratchet effect
• Ratchet potential for fluxons in Josephson-Junction arrays

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