  The semiclassical dynamics of a charged particle moving in a two-component
plasma is considered using a corrected Kelbg pseudopotential. We employ the
classical Nevanlinna-type theory of frequency moments to determine the velocity
and force autocorrelation functions. The constructed expressions preserve the
exact short and long-time behavior of the autocorrelators. The short-time
behavior is characterized by two parameters which are expressable through the
plasma static correlation functions. The long-time behavior is determined by
the self-diffusion coefficient. The theoretical predictions are compared with
the results of semiclassical molecular dynamics simulation.
