Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.39: Poster

Donnerstag, 17. März 2011, 16:30–19:30, P1

Probing ultracold fermions in optical lattices — •Jasper Simon Krauser, Sören Götze, Jannes Heinze, Bastian Hundt, Nick Fläschner, Dirk-Sören Lühmann, Christoph Becker, and Klaus Sengstock — Institut für Laserphysik, Universität Hamburg

Quantum gases in optical lattices offer a wide range of applications for quantum simulation due to fully tunable lattice and atomic interaction parameters. In our setup we sympathetically cool ⁸⁷Rb and ⁴⁰K and load this mixture into an optical lattice superimposed with a magic dipole trap. In this poster, we discuss experimental aspects and recent results of our Bose-Fermi mixture project. In detail, we report on high resolution spectroscopy of ultracold fermions in optical lattices with full momentum resolution. We can accurately extract the band structure and filling information allowing for the determination of the phase of the system. Our experimental sensitivity is promising for the extension of these studies to observe interaction shifts due to the presence of bosonic atoms [1,2] as well as changes in the density of states for interacting fermionic gases.

[1] Lühmann et al., PRL 101, 050402 (2008)

[2] Best et al., PRL 102, 030408 (2009)