Brownian motion: Anomalous response due to noisy chaosD. Speer, R. Eichhorn and P. Reimann
Universität Bielefeld, Fakultät für Physik - 33615 Bielefeld, Germany
received 12 March 2007; accepted in final form 24 May 2007; published July 2007
published online 15 June 2007
We predict three different, quite unusual transport properties of an underdamped Brownian particle in the form of current and force of opposite signs. Their origin is a subtle interplay between the stability of coexisting attractors, noise-induced metastability, and transient chaos. Numerical simulations are complemented by intuitive explanations of the basic mechanism and analytical approximations.
05.45.-a - Nonlinear dynamics and chaos.
05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.
05.60.-k - Transport processes.
© Europhysics Letters Association 2007