THE APPLICATION OF THE RENORMALIZATION-GROUP TO DIFFUSION IN AMORPHOUS MATERIALS

Abstract

A renormalization-group analysis of the long-time and long-distance behaviour of the diffusion in an environment with a quenched random drift force is carried out. The diffusion is characterized by an equation of motion in which the gaussian random forcing function appears multiplicatively. The correction to the diffusion law at long-time is calculated in the framework of the epsilon-expansion method.