We have produced a macroscopic quantum system in which a ⁶Li Fermi sea coexists with a large and stable ²³Na Bose-Einstein condensate. This was accomplished using interspecies sympathetic cooling of fermionic ⁶Li in a thermal bath of bosonic ²³Na. The system features rapid thermalization and long lifetimes.
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Hadzibabic et al. (2002) studied this question.
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