Collective ion dynamics in Coulomb one-component plasmas within the self-consistent relaxation theory

In this paper, we present the theoretical formalism describing the collective ion dynamics of the nonideal Coulomb classical one-component plasmas on the basis of the self-consistent relaxation theory. The theory is adapted to account for correlations between the frequency relaxation parameters that characterize the three-and four-particle dynamics and the parameters associated with the two-particle dynamics. The dynamic structure factor spectra and dispersion characteristics calculated for a wide range of wave numbers are in agreement with the molecular dynamics simulation data and the results obtained with the theory of the frequency moments. The proposed formalism reproduces all the features inherent to the Coulomb one-component plasmas and requires only knowledge of the coupling parameter and the information about the structure.

Automated summary

In this paper, a theoretical formalism is presented to describe the collective ion dynamics of nonideal Coulomb one-component plasmas based on the self-consistent relaxation theory. The theory takes into account correlations between the frequency relaxation parameters and parameters associated with two-particle dynamics. The calculated dynamic structure factor spectra and dispersion characteristics are found to be in agreement with molecular dynamics simulation data and the results obtained with the theory of frequency moments.