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Observation of a Degenerate Fermi Gas Trapped by a Bose-Einstein Condensate

B. J. DeSalvo, Krutik Patel, Jacob Johansen, and Cheng Chin
Phys. Rev. Lett. 119, 233401 – Published 7 December 2017
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Abstract

We report on the formation of a stable quantum degenerate mixture of fermionic Li6 and bosonic Cs133 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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  • Received 19 June 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.233401

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Synopsis

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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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Authors & Affiliations

B. J. DeSalvo, Krutik Patel, Jacob Johansen, and Cheng Chin

  • James Franck Institute, Enrico Fermi Institute, and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA

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Issue

Vol. 119, Iss. 23 — 8 December 2017

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