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The Dynamical Structure Function of the One‐Component Plasma Revisited
Author(s) -
Korolov I.,
Kalman G. J.,
Silvestri L.,
Donkó Z.
Publication year - 2015
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201400098
Subject(s) - physics , plasma , harmonics , range (aeronautics) , coupling (piping) , coulomb , component (thermodynamics) , function (biology) , dispersion (optics) , coupling parameter , noise (video) , statistical physics , computational physics , quantum mechanics , materials science , electron , computer science , image (mathematics) , voltage , evolutionary biology , artificial intelligence , metallurgy , composite material , biology
We present high precision Molecular Dynamics simulations for the dynamical structure function, S ( k , ω ), of the classical Coulomb One Component Plasma (OCP), for a wide range of the coupling parameter Γ (from 0.05 to 10 000). We follow the positive‐to‐negative transition of the slope of the ω ( k ) dispersion curve at small wave numbers caused by the onset of correlations with increasing coupling. The high signal‐to‐noise ratio of the data over several orders of magnitude allows examination of a wide dynamical range of S ( k , ω ), including extreme values of ω and k , and the identification of waves at higher harmonics of the plasma frequency. Sum rules are found to be accurately satisfied. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)