Berlin 2014 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 19: Poster Session - Low Temperature Plasmas

P 19.5: Poster

Mittwoch, 19. März 2014, 16:30–18:30, SPA Foyer

Quantum breathing frequency of nanoplasmas — •Tobias Dornheim, Alexey Filinov, Jan Willem Abraham, and Michael Bonitz — ITAP, Christian-Albrechts-Universität zu Kiel, Leibnizstraße 15, 24098 Kiel

Spatially confined charged particle systems ("nanoplasmas") are of increasing interest in condensed matter (quantum dots), metal clusters or for the interior of compact stars. The quantum breathing mode (QBM) has been proposed as a possible diagnostics for such systems [1]. We investigate the frequency of the QBM of charged particles in one, two and three dimensional systems for the whole range of coupling strengths and a variety of particle numbers. We present results from ab initio calculations of thermodynamic properties like e.g. energies and densities of up to N∼10⁴ trapped particles, using a GPU accelerated realization of the Worm Algorithm Path Integral Monte Carlo scheme [2]. A recently published improved sum rule formalism [3] allows us to obtain an accurate upper bound for the breathing mode frequency. Finally we compare our results to available data for trapped charged fermions [3] and discuss the influence of Bose- and Fermi-statistics.

[1] C.R. McDonald et al., Phys. Rev. Lett., in press
[2] M. Boninsegni et al., Phys. Rev. E 74, 036701 (2006)
[3] J.W. Abraham et al., ArXiv e-prints 1311.5371, (2013)