Bose-Einstein condensation of molecules.

Jochim, S; Bartenstein, M; Altmeyer, A; Hendl, G; Riedl, S; Chin, C; Hecker Denschlag, J; Grimm, R · Science · 2003

basic_science · Level V

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Abstract

We report on the Bose-Einstein condensation of more than 10(5) Li2 molecules in an optical trap starting from a spin mixture of fermionic lithium atoms. During forced evaporative cooling, the molecules are formed by three-body recombination near a Feshbach resonance and finally condense in a long-lived thermal equilibrium state. We measured the characteristic frequency of a collective excitation mode and demonstrated the magnetic field-dependent mean field by controlled condensate spilling.