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Q: Quantenoptik und Photonik

Q 21: Poster Quantengase

Q 21.1: Poster

Dienstag, 23. März 2004, 14:00–16:00, Schellingstr. 3

Degenerate fermionic potassium in an optical lattice — •Henning Moritz, Thilo Stöferle, Christian Schori, Michael Köhl, and Tilman Esslinger — Institut für Quantenelektronik, ETH Zürich, CH-8093 Zürich

For quantum degenerate fermions a variety of fascinating quantum phenomena, such as BCS-type superfluidity, are theoretically predicted to occur. The BCS-transition temperature in a lattice is expected to be significantly higher than in an harmonic trap due to the increased interaction at the individual lattice sites [1].

In our recent experiments with Rubidium in an optical lattice we have realised the first truly one-dimensional Bose-Gas [2] and studied the transition from a strongly interacting superfluid to a Mott insulator in one dimension [3]. We have managed to sympathetically cool fermionic Potassium 40 to quantum degeneracy in the same machine. The poster will report on the experiments with these atoms in the optical lattice.

[1] W. Hofstetter et al., Phys. Rev. Lett. 89, 220407 (2002)

[2] H. Moritz et al., Phys. Rev. Lett. in press

[3] T. Stöferle et al., preprint 2003