Abstract
A number of new features of the overlapping Lorentz gas are obtained using a method based on describing the system as a random walk on a disordered lattice. The velocity correlation function is shown to have a contribution which decays like . This term is the dominant long-time tail for d>3 and above the percolation threshold. New values are obtained for the exponents describing the vanishing of the diffusion coefficient and the intermediate-time tail near threshold.
- Received 25 July 1985
DOI:https://doi.org/10.1103/PhysRevA.32.3164
©1985 American Physical Society