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Berlin 2008 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.40: Poster

Thursday, February 28, 2008, 16:00–18:00, Poster C

Melting of trapped few particle systems — •Jens Böning1, Alexei Filinov1, Patrick Ludwig1, Henning Baumgartner1, Michael Bonitz1, and Yurii Lozovik21Institut 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, arXiv:0711.1124.

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