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P: Fachverband Plasmaphysik

P 20: Simulationsverfahren / Theorie/Modellierung II

P 20.2: Hauptvortrag

Donnerstag, 31. März 2011, 11:00–11:30, HS H

First Principle Simulations of Strongly Correlated Classical and Quantum Plasmas — •Patrick Ludwig — Christian-Albrechts-Universität zu Kiel, Institut für Theoretische Physik und Astrophysik, Kiel

Due to the tremendously fast development of digital computers in the last decades, particle-based bottom-up approaches such as Molecular Dynamics or Monte Carlo methods have become standard tools, which allow to treat interactions and strong many-body correlations without mathematical simplifications - from first principles.

In my talk I will consider two types of strongly correlated multi-component plasmas: (i) spherically confined complex (dust) plasmas, and (ii) two-component quantum plasmas in semiconductors and warm dense matter (WDM). By changing the plasma parameters (temperature, density, mass-ratio of the different plasma constituents) or the effective range of the pair interaction both considered systems can be tuned from a weakly coupled state to a strongly coupled, crystal-like phase.[1,2] Despite their completely different nature and their occurrence on completely different length and energy scales both systems are found to share various collective structural, spectral, as well as dynamical features which is due to the governing role of Coulomb interaction and finite size effects.[3]

But also the effect of dynamical screening and the formation of wake field potentials, which is a well known effect in streaming classical dusty plasmas[4], is recovered in two-component electron-ion plasmas with strong impact on the structure formation in strongly correlated WDM. A scheme which allows to compute the dynamics of strongly correlated classical ions embedded into a partially ionized quantum plasma by first principles molecular dynamics is presented.[5]

[1] Introduction on Complex Plasmas, M. Bonitz, N. Horing, and P. Ludwig (eds.), Springer 2010 [2] Ludwig et al., Plasma Phys. Control. Fusion 52, 124013 (2010) [3] Ludwig et al., New Journal of Physics 10, 083031 (2008) [4] Lampe et al., IEEE Trans. Plasma Sci. 33, 57 (2005) [5] Ludwig et al., J. Phys. Conf. Series 220, 012003 (2010)