Long-time versus short-time behaviour of a system of interacting Brownian particles

Abstract

A Mori-type transport equation for the dynamical structure factor S(k, t) for a system of charged Brownian particles is solved in a mode-mode coupling approximation within the OCP model. The agreement with recent light scattering experiments on the difference between the long-time and the short-time decay of S(k, t) in systems of polystyrene spheres is satisfactory.