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DY: Dynamik und Statistische Physik

DY 43: Einstein Symposium Brownian Motion, Diffusion and Beyond (SYBM) – Contributed Talks I

DY 43.14: Vortrag

Dienstag, 8. März 2005, 17:45–18:00, TU H2032

multiple ion diffusion in disordered environments — •Joachim Sohns and Michael Schulz — Universität Ulm, Abteilung theoretische Physik, Albert-Einstein-Allee 11 89069 Ulm

The goal of this study is to give an analytical model to describe the mixed alkali effect. As a first step we discuss the behaviour of two different ions in a stochastic environment A random energy model is used which leads to a multi-particle fokker-planck equation with random potentials. As a model for the two different alkali ions we use two different potentials. We assume cross correlations between the potentials and interaction between the particles by coulomb forces. We use perturbation theory up to second order to find an approximation for the distribution of the particles. We discuss the influence of finite dimensions on our model.