Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 63: Quantum gases: Lattices III
Q 63.7: Talk
Friday, March 21, 2014, 15:30–15:45, UDL HS2002
Ultracold Fermions in Optical Superlattices — •Michael Schreiber1,2, Pranjal Bordia1,2, Frederik Görg1,2, Henrik Lüschen1,2, Pau Gomez1,2, Simon Braun1,2, Sean Hodgman1,2, Immanuel Bloch1,2, and Ulrich Schneider1,2 — 1Ludwig-Maximilians-Universität, Schellingstrasse 4, 80799 München — 2Max-Planck-Institut für Quantenoptik, Hans Kopfermann Str. 1, 85748 Garching b. München
Fermionic 40K atoms in a conventional blue detuned optical lattice can serve as a highly tunable quantum simulator of the Fermi-Hubbard model. Within this model the charge dynamics have been studied in recent years, examples include the formation of fermionic Mott insulators and various transport experiments. By upgrading one axis to a bichromatic superlattice we are now able to conduct a whole new range of experiments by directly creating and probing various staggered orders.
The additional possibilities range from the observation of microscopic processes like singlet-triplet oscillations or superexchange interactions in individual double wells to the preparation of e.g. charge-density waves or magnetically ordered states.
We present our latest data on in- and out-of-equilibrium phenomena in these systems.