Phys. Rev. Lett. 92, 120401 (2004) [4 pages]Crossover from a Molecular Bose-Einstein Condensate to a Degenerate Fermi GasReceived 8 January 2004; revised 2 February 2004; published 23 March 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.120401
DOI:
10.1103/PhysRevLett.92.120401
PACS:
03.75.Mn, 05.30.Fk, 32.80.Pj, 34.50.–s
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