Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 3: Quantum gases: Interaction effects I

Q 3.4: Vortrag

Montag, 18. März 2013, 12:00–12:15, E 001

Variational investigation of dipolar BEC in multi-well potentials — •Rüdiger Eichler, Jörg Main und Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart

The dipolar interaction of the atoms in Bose-Einstein condensates leads to a variety of interesting effects such as self-organization and formation of patterns. Multi-well potentials are well suited settings for the examination of these effects and the mechanisms behind. The dynamics of dipolar Bose-Einstein condensates in multi-well potentials can be described in the mean-field limit by an extended time-dependent Gross-Pitaevskii equation (GPE). We solve this GPE by a time-dependent variational principle where we use coupled Gaussian wave packets. With this method we do not only obtain the ground state of the condensate but the excited states as well. These play a crucial role e.g. in the creation of different phases. We show that this is connected to crossings of the involved states. Furthermore, dynamics in multi-well potentials will be shown which now can be interpreted by means of the presence of different states.