Expansion of a lithium gas in the BEC-BCS crossover

J. Zhang, E. G. M. Van Kempen, T. Bourdel +7

We report on experiments in ${}^6$Li Fermi gases near Feshbach resonances. A broad s-wave resonance is used to form a Bose-Einstein condensate of weakly bound ${}^6$Li${}_2$ molecules in…