Darmstadt 2008 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P III: Poster: Diagnostik, Theorie, Schwerionen- und lasererzeugte Plasmen, Sonstiges

P III.22: Poster

Dienstag, 11. März 2008, 11:00–13:00, Poster C3

Melting of trapped few particle systems — •Jens Böning¹, Alexei Filinov¹, Patrick Ludwig¹, Henning Baumgartner¹, Michael Bonitz¹, and Yurii Lozovik² — ¹Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — ²Institute for Optics and Spectroscopy of the RAS, Troitsk, Russia

Solid or liquid behavior are collective properties of macroscopic systems. Nevertheless, collective behavior emerges already in small systems. But, how many particles are required and how to reliably detect liquid or solid behavior and the melting point in a small system? While in large systems there exist many equivalent quantities, in small systems the predicted melting point strongly depends on the choice of quantity and on the way it is computed yielding ambiguous and even divergent results [1]. We present a very simple quantity which allows to overcome these problems – the variance of the block averaged interparticle distance fluctuations [2].

[1] D.D. Frantz, J. Chem. Phys. 115, 6136 (2001)

[2] J. Böning, A. Filinov, P. Ludwig, H. Baumgartner, M. Bonitz, and Yu.E. Lozovik, submitted for publication, arXiv:0711.1124.