Hamburg 2009 – scientific programme

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A: Fachverband Atomphysik

A 15: Poster I

A 15.43: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster

Quantum breathing mode of charged fermions and bosons at arbitrary coupling — •Sebastian Bauch, Karsten Balzer, Christian Henning, David Hochstuhl, and Michael Bonitz — Christian-Albrechts-Universität Kiel, Institut für Theoretische Physik und Astrophysik, Leibnizstraße 15, 24098 Kiel, Germany

We present a detailed analysis of the quantum breathing behavior of few-particle Coulomb systems in one- and two-dimensional harmonic traps. While the behavior in limiting cases, the classical limit and the ideal quantum limit, are well-known [e.g. 1, 2], we report a smooth transition behavior in between by variation of the relative interaction strength. We further show, that spin-statistic effects, i.e. the symmetry of the wave function, play an important role. We solve the many particle Schrödinger equation and compare with mean-field Hartree Fock calculations. The numerically obtained results may serve as an experimental tool to probe small interacting quantum systems.

[1] C. Henning, K. Fujioka, P. Ludwig, A. Piel, A. Melzer and M. Bonitz, Phys. Rev. Lett. 101, 045002 (2008)

[2] M. R. Geller and G. Vignale, Phys. Rev. B 53, 6979 (1996)