Comparative merits of the memory function and dynamic local field correction of the classical one-component plasma

Details Comparative merits of the memory function and dynamic local field correction of the classical one-component plasma Comparative merits of the memory function and dynamic local field correction of the classical one-component plasma

2011-06-22

arxiv.org/abs/1106.4401v1

Physics

Plasma Physics

10 pages, 11 figures

Scientific paper

The complementarity of the liquid and plasma descriptions of the classical one-component plasma (OCP) is explored by studying wavevector and frequency dependent dynamical quantities: the dynamical structure factor (DSF), and the dynamic local field correction (LFC). Accurate Molecular Dynamics (MD) simulations are used to validate/test models of the DSF and LFC. Our simulations, which span the entire fluid regime ($\Gamma = 0.1 - 175$), show that the DSF is very well represented by a simple and well known memory function model of generalized hydrodynamics. On the other hand, the LFC, which we have computed using MD for the first time, is not well described by existing models.

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