Paradoxical motion of a single Brownian particle: absolute negative mobility.
We consider a single, classical Brownian particle in a spatially symmetric periodic system far from thermal equilibrium, which can be readily realized experimentally. Upon application of an external static force F, the average particle velocity is negative for F>0 and positive for F<0 (absolute negative mobility). The various physical mechanisms responsible for such a paradoxical effect are identified, leading to analytical approximations that are in good agreement with numerical simulations.
Eichhorn
Ralf
R
Fakulät für Physik, Universität Bielefeld, Germany.
Reimann
Peter
P
Hänggi
Peter
P