Düsseldorf 2007 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 56: Quantengase (Fermionen und Gemische)
Q 56.3: Talk
Thursday, March 22, 2007, 14:30–14:45, 6J
Mixture of bosons and spin-polarized fermions in optical lattices — •Corinna Kollath1, Lode Pollet2, Ulrich Schollwöck3, and Matthias Troyer2 — 1University of Geneva, Switzerland — 2ETH Zürich, Switzerland — 3RWTH- Aachen, Deutschland
The physics in a mixture of bosonic and fermionic atoms confined to an optical lattice is very rich. Recently, two experimental groups succeeded in loading a mixture of bosonic and fermionic atoms into an optical lattice. The presence of a trapping potential makes the interpretation of the results difficult and controversial. We focus on the interplay of strong interparticle interactions, a trap, and finite temperature which leads to physics quite different from the homogeneous case. To name one example, we find a non-monotonous dependence of the visibility of the matter wave interference pattern after releasing the bosons from the optical lattice versus the lattice depth. This is in contrast to the experimental results and the difference can be resolved when taking into account heating while ramping up the lattice.