Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.67: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

Noise effects on Landau-Zener transitions in Bose-Einstein condensates — •Matthias Kraft, Stephan Burkhardt, and Sandro Wimberger — Institute for Theoretical Physics and HGSFP, University Heidelberg

Quantum transport phenomena in Bose-Einstein condensates (BEC) loaded into spatially periodic lattices is an active area of current research. For the Wannier-Stark system, which can be realized with a tilted optical lattice, the Landau-Zener model provides a fruitful approach to describe interband transitions of the atoms in the condensate. Nevertheless to gain a good understanding of the dynamics of any real system the implementation of noise into the model is crucial. We therefore extend the simple Landau-Zener model to incorporate typical sources of noise. This is done to investigate the interband transition dynamics of the atoms in the BEC when a ''noisy'' optical lattice is considered. The possibility to use noise to control the transition probability is discussed.