Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster 2

Q 35.28: Poster

Wednesday, March 14, 2012, 16:30–19:00, Poster.I+II

Ion crystals in multipole traps — •Florian Cartarius, Cecilia Cormick, and Giovanna Morigi — Theoretische Physik, Universität des Saarlandes, 66041, Saarbrücken, Deutschland

Doppler cooled ions in linear radiofrequency multipole traps can organize in ordered structures. For a sufficiently large number of ions, tubes of various sizes have been reported [1]. In this work, we theoretically analyse the equilibrium configurations of dozens of ions in anisotropic traps for different orders of the multipolar potential. We identify the parameter regimes where the tubes are stable, and derive the dispersion relation and the normal modes of these structures. These results are applied to calculate the thermodynamic properties of the ion tubes.

[1] K. Okada, K. Yasuda, T. Takayanagi, M. Wada, H. Schuessler, and S. Ohtani, Phys. Rev. A, 75 033409 (2007)