PMID: 11308773Apr 20, 2001Paper

Stochastic properties of strongly coupled plasmas

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
I V MorozovA A Valuev

Abstract

Stochastic properties of equilibrium strongly coupled plasmas are investigated by a molecular dynamics method. The Krylov-Kolmogorov entropy K and the dynamical memory time t(m) are calculated both for electrons and ions with mass ratios 10-10(5). Two values of K entropy for ions are discovered corresponding to electron and ion time scales. The dependence of the K entropy on the number of particles, the nonideality parameter, and the form of the interaction potential is investigated. The problem of the accuracy of molecular dynamics simulations is discussed. A universal relation between Kt(m) and the fluctuation of the total energy of the system is obtained. The relation does not depend on the numerical integration scheme, temperature, density, and the interparticle interaction potential, so that it may be applied to arbitrary dynamic systems. Transition from dynamic to stochastic correlation is treated for both electron and ion velocity autocorrelation functions, for Langmuir and ion-sound plasma wave dynamic structure factors. We point to quantum uncertainty as a physical reason which limits dynamic (Newton) correlation for times greater than t(m).

References

Mar 1, 1994·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·W G Hoover, H A Posch

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Citations

Jul 13, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·H ReinholzTh Millat
Aug 11, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·I MorozovG Zwicknagel
Mar 17, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·V B BobrovS A Trigger

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