Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Quantum Gases: Interaction Effects II

Q 31.2: Vortrag

Mittwoch, 10. März 2010, 14:15–14:30, E 001

Coherent oscillations in a many-body Wannier-Stark system — •Patrick Plötz and Sandro Wimberger — Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg

We study the effect of a many-body interaction on inter-band oscillations in a two-band Bose-Hubbard model with external Stark force. We identify a regime of strong inter-band coupling and observe an interaction-induced collapse and revival of the resonant inter-band oscillations. Effective models for oscillations in and out of resonance are presented and analytical predictions for the collapse and revival time of the oscillations are given.