Numerical results on the density fluctuations in liquid rubidium

Abstract

Numerical results for the dynamic structure factor $S(\mathrm{qw})$ in liquid rubidium are presented based on a kinetic theory presented in an earlier paper. The results are in quantitative agreement with those obtained from molecular dynamics calculations and experiments. In the theory, different dynamical processes such as single binary collisions and nonlinear couplings to density and current fluctuations, are separated, and we investigate their relative contributions to the relevant memory function, as well as their effect on the shape of $S(\mathrm{qw})$.