Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 27: Quantengase: Optische Gitter 2

Q 27.1: Talk

Tuesday, March 13, 2012, 14:00–14:15, V53.01

Single fermions immersed in a Bose Einstein Condensate — •Raphael Scelle, Tobias Schuster, Arno Trautmann, Tobias Rentrop, and Markus K. Oberthaler — Kirchhoff-Institut für Physik, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg

We present studies on lithium exposed to a species-selective one dimensional lattice in a background gas of Bose Einstein condensed gas of sodium atoms. The population of the Bloch states (lowest and first excited) are inferred from time-of-flight measurements after adiabatically ramping down the lattice potential i.e. band mapping. For deep lattices, atoms are transferred coherently between first and second Bloch Band, i.e. coherent Rabi oscillations between Bloch states are observed. By immersing the fermions into a Bose Einstein condensate of sodium atoms dissipation can be introduced in a controlled way. The experimental setup allows for the investigation of the relaxation dynamics of the populations as well as the coherence of the motional degree of the fermionic lithium.