Berlin 2005 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 32: Quantengase I
Q 32.2: Vortrag
Dienstag, 8. März 2005, 11:00–11:15, HU Kinosaal
Bose-Einstein condensation of 52Cr — •Axel Griesmaier, Sven Hensler, Jörg Werner, Jürgen Stuhler, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany
We report on the observation of Bose-Einstein condensation of 52Cr atoms. We start with 300.000 atoms in a crossed optical dipole trap. Lowering the intensity of the horizontal trapping beam to about 5% of its initial value within a few seconds, we evaporatively cool the atoms to degeneracy. Slightly below Tc, the atomic cloud shows the typical bimodal distribution after 5 ms time of flight. Releasing the atoms from an anisotropic trap, we observe the expected change in the aspect ratio of the expanding cloud. We are able to produce nearly pure condensates with more than 20.000 52Cr atoms.