Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 48: Quantum Gases: Effects of Interactions

Q 48.9: Talk

Thursday, March 17, 2011, 12:30–12:45, SCH 251

Macroscopic quantum tunnelling and bounce solutions of Bose-Einstein condensates with dipolar interaction — •Torsten Schwidder, Jörg Main, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart

Macroscopic quantum tunnelling is discussed for Bose-Einstein condensates with dipolar interaction. The decay of a metastable groundstate into a collapsing wave function is investigated in a time-dependent variational approach to the nonlinear Gross-Pitaevskii equation. For a superposition of Gaussian wave functions the bounce trajectory is computed in imaginary time using a multi-shooting algorithm and tunnelling rates are calculated.