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DY: Fachverband Dynamik und Statistische Physik

DY 6: Poster Session I

DY 6.20: Poster

Montag, 22. März 2010, 16:00–18:00, Poster B2

Directed Brownian motion of asymmetric particles in a time-dependent potential — •Martin Reichelsdorfer and Klaus Mecke — Institut für Theoretische Physik, Universität Erlangen-Nürnberg, Staudstr. 7, 91058 Erlangen

The motion of an asymmetrically shaped particle in a heat-bath can be directed if it is kept far away from thermal equilibrium. This can be achieved by a time-dependent spatial-symmetric potential. As a model system a hard convex body with one translational degree of freedom which experiences an harmonic restoring force with exponentially decreasing spring constant is studied in an ideal gas. Fluctuation theorems are tested and the efficiency is determined.