Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas |
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Authors: | Bartenstein M Altmeyer A Riedl S Jochim S Chin C Denschlag J Hecker Grimm R |
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Institution: | Institut für Experimentalphysik, Universit?t Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria. |
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Abstract: | We demonstrate a reversible conversion of a 6Li2 molecular Bose-Einstein condensate to a degenerate Fermi gas of atoms by adiabatically crossing a Feshbach resonance. By optical in situ imaging, we observe a smooth change of the cloud size in the crossover regime. On the Feshbach resonance, the ensemble is strongly interacting and the measured cloud size is 75(7)% of the one of a noninteracting zero-temperature Fermi gas. The high condensate fraction of more than 90% and the adiabatic crossover suggest our Fermi gas to be cold enough to form a superfluid. |
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