Düsseldorf 2007 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster Ultrakalte Atome

Q 62.1: Poster

Donnerstag, 22. März 2007, 16:30–18:30, Poster C

Simulations of multi-species ion crystals in an rf ion trap — •Chaobo Zhang, David Offenberg, Bernhard Roth, and Stephan Schiller — Universitätsstr.1, 25.42 01.36, D-40225 Düsseldorf

Molecular dynamics (MD) simulations are a powerful tool to investigate the properties of many-body systems. We have simulated heating and cooling processes for multi-species ion crystals confined in a linear rf ion trap, and have deduced ion numbers, ion temperatures, and crystal shapes. The trap modes of oscillation were studied which is essential to interpret experimental trap mode spectra. Rf micromotion was included in the simulations, and the results were compared to the pseudopotential case. We have shown that, in order to interpret the experimental results, the pseudopotential approach is sufficient. Furthermore, the coupling of the radial micromotion to the axial motion of the ions in an ideal rf trap and the heating rate of an rf phase offset on the middle electrodes were investigated.