Collective and static properties of model two-component plasmas

TL;DR

This paper analyzes classical two-component plasma models using sum rules and static structure factors, improving agreement with molecular dynamics data and revealing key statistical properties of the plasma system.

Contribution

It introduces a method to connect dielectric function moments with static structure factors, enhancing analysis of plasma properties.

Findings

Improved agreement between theoretical analysis and MD data.

Determined probability of electron-ion co-location in plasma.

Specified high-frequency dielectric behavior including inverse bremsstrahlung effects.

Abstract

Classical MD data on the charge-charge dynamic structure factor of two-component plasmas (TCP) modeled in Phys. Rev. A 23, 2041 (1981) are analyzed using the sum rules and other exact relations. The convergent power moments of the imaginary part of the model system dielectric function are expressed in terms of its partial static structure factors, which are computed by the method of hypernetted chains using the Deutsch effective potential. High-frequency asymptotic behavior of the dielectric function is specified to include the effects of inverse bremsstrahlung. The agreement with the MD data is improved, and important statistical characteristics of the model TCP, such as the probability to find both electron and ion at one point, are determined.