Internal vs. External Conductivity of a Dense Plasma: Many-particle theory and simulations

摘要

In the long-wavelength limit k=0, the response function has been investigatedwith respect to the external and internal fields which is expressed by theexternal and internal conductivity, respectively. Molecular dynamics (MD)simulations are performed to obtain the current-current correlation functionand the dynamical collision frequency which are compared with analyticalexpressions. Special attention is given to the dynamical collision frequencyand the description of plasma oscillations in the case of k=0. The relationbetween the external and internal conductivity and to the current-currentcorrelation function is analyzed.