Abstract
We report on the formation of a stable quantum degenerate mixture of fermionic and bosonic in an optical trap by sympathetic cooling near an interspecies Feshbach resonance. New regimes of quantum degenerate Bose-Fermi mixtures are identified. With moderate attractive interspecies interactions, we show that a degenerate Fermi gas of Li can be fully confined in a Cs Bose-Einstein condensate without external potentials. For stronger attraction where mean-field collapse is expected, no such instability is observed. Potential mechanisms to explain this phenomenon are discussed.
- Received 19 June 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.233401
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Fermions Trapped in Boson Gas
Published 7 December 2017
A Bose-Einstein condensate can act as a stable trap for a gas of fermions.
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