Ion Potential in Non-ideal Dense Quantum Plasmas

TL;DR

This paper investigates the screened ion potential in non-ideal dense quantum plasmas using the Singwi-Tosi-Land-Sj"olander approximation, comparing with other models and emphasizing electronic correlation effects in strongly coupled ionic systems.

Contribution

It introduces a detailed analysis of ion potentials in dense quantum plasmas using the STLS approximation and compares results with quantum Monte Carlo data and existing models.

Findings

Electronic correlation effects are significant for plasma dynamics.

The STLS approximation aligns well with quantum Monte Carlo data.

Ion potential models vary notably at high densities.

Abstract

The screened ion potential in non-ideal dense quantum plasmas is investigated by invoking the Singwi-Tosi-Land-Sj\"olander approximation for the electronic local field correction at densities $r_s\lesssim 2$ and degeneracy parameters $\theta\lesssim 1$, where $r_s$ is the ratio of the mean inter-particle distance to the first Bohr radius, and $\theta$ is the ratio of the thermal energy to the Fermi energy of the electrons. Various cross-checks with ion potentials obtained from ground state quantum Monte-Carlo data, the random phase approximation, as well as with existing analytical models are presented. Further, the importance of the electronic correlation effects for the dynamics in strongly coupled ionic subsystems for $0.1\leq r_s\leq 2$ is discussed.