Abstract
Abstract The role of binary collisions in Lorentz Gases is investigated through a dynamical theory which incorporates exactly all the effects of a single collision between a pair of particles interacting with a Kennard-Jones potential. The comparison of our results with those of molecular dynamics thus yields a quantitative estimate of the effect and indicates that our simple but very physical model is able to account for a significant portion of the decay of the density fluctuation correlation function, for the wave numbers considered.
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