Journal
PHYSICAL REVIEW LETTERS
Volume 119, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.233401
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Funding
- University of Chicago Materials Research Science and Engineering Center
- National Science Foundation [DMR-1420709]
- NSF [PHY-1511696]
- Grainger Fellowship
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We report on the formation of a stable quantum degenerate mixture of fermionic Li-6 and bosonic Cs-133 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.
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