Interpolation between static local field corrections and the Drude model by a generalized Mermin approach

Details Interpolation between static local field corrections and the Drude model by a generalized Mermin approach Interpolation between static local field corrections and the Drude model by a generalized Mermin approach

2008-12-19

arxiv.org/abs/0812.3835v1

Physics

Plasma Physics

extended version of poster presented at SCCS 2008, Camerino

Scientific paper

In non-ideal plasmas, the dielectric function has to be treated beyond the random phase approximation. Correlations and well as collisions have to be included. These corrections are known as (dynamical) local field corrections. With the help of the Zubarev approach to linear response theory, a relaxation time approximation is proposed leading to an interpolation scheme between static local field corrections and the Drude model in the long wave length limit. The approach generalizes the Mermin approximation for the dielectric function and allows for the inclusion of a dynamical collision frequency. Exploratory calculations for a classical two-component plasma at intermediate coupling are presented.

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