Phys. Rev. Lett. 93, 050401 (2004) [4 pages]Experimental Study of the BEC-BCS Crossover Region in Lithium 6Received 2 March 2004; revised 14 April 2004; published 27 July 2004 We report Bose-Einstein condensation of weakly bound 6Li2 molecules in a crossed optical trap near a Feshbach resonance. We measure a molecule-molecule scattering length of 170-60+100 nm at 770 G, in good agreement with theory. We study the 2D expansion of the cloud and show deviation from hydrodynamic behavior in the BEC-BCS crossover region. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.050401
DOI:
10.1103/PhysRevLett.93.050401
PACS:
03.75.Ss, 05.30.Fk, 32.80.Pj, 34.50.–s
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