Osnabrück 2002 – scientific programme
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Q: Quantenoptik
Q 321: Bose-Einstein Kondensation II
Q 321.7: Talk
Wednesday, March 6, 2002, 18:00–18:15, HS 22/B01
Two-Species Mixture of Quantum Degenerate Fermi and Bose Gases — •Kai Dieckmann1, Zoran Hadzibabic1, Claudiu Stan1, Subhadeep Gupta1, Martin Zwierlein2, Axel Görlitz3, and Wolfgang Ketterle1 — 1MIT, Cambridge, USA — 2ENS, Paris — 3Universität Stuttgart
We produced a degenerate 6Li Fermi gas in coexistence with a 23Na Bose-Einstin condensate. The large and stable sodium condensates produced in our machine are used as large reservoirs for efficient sypathetic cooling of 6Li by 23Na. We describe the double species trapping and cooling process resulting in fermionic clouds of about 1.5 ×105 atoms in the magnetically trapped ∣1/2, −1/2⟩ state at a lowest achieved temperature of 300 nK, equal to 0.5 TF. At the same time a sodium condensate consisting of about 2 × 106 atoms in the ∣1, −1⟩ state is overlapping with the lithium cloud. This quantum degenerate mixture is stable with a lifetime of 10 s limited by decay of sodium. Therefore, this system serves as a starting point for the studies of the limitations of the sypathetic cooling process, and the properties of the two-species mixture as well as the degenerate 6Li gas in an optical trap.