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DY: Dynamik und Statistische Physik

DY 34: Poster

DY 34.24: Poster

Monday, March 7, 2005, 15:30–18:00, Poster TU D

Diffusion in time-dependent potentials — •E. Paule¹, Th. Pletl¹, P. Chvosta², and P. Reineker¹ — ¹Abt. Theoretische Physik, Universität Ulm, Albert-Einstein-Allee 11, 89069 Ulm — ²Dep. of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, CZ-180 00Praha, Czech Republic

We investigate numerically the one-dimensional diffusion of a particle in time-dependent potentials. For this purpose we solve the Fokker-Planck equation with the Finite-Element-Method (FEM). The time-dependence of the potential is given by a harmonically modulated force. The mean position of the particle as a function of time is of our interest. We focus on resonance-like behaviour of the response of the system in the stationary limit.