Sound Propagation and Correlation of Quantum Degenerate $^{133}$Cs-$^6$Li Bose-Fermi Mixtures

ORAL

Abstract

We investigate interactions and dynamics of Bose-Einstein condensates(BECs) of $^{133}$Cs atoms immersed in degenerate Fermi gases(DFGs) of $^6$Li atoms. At quantum degeneracy, the interplay between particle-hole excitations of DFGs and phonon excitations of the BECs gives rise to a variety of interesting phenomenon. Based on in-situ imaging and optical potential projection, we excite and image sound propagation in the Bose-Fermi mixtures with tunable interactions across an interspecies Feshbach resonance. Surprisingly, stable sound propagation is observed across the resonance. Furthermore, we develop fast dual species in situ imaging to study correlations of bosonic and fermionic fields in the presence of strong interspecies interactions.

*This work was supported by the National Science Foundation under Grant No. PHY1511696 and PHY-2103542, by the Air Force Office of Scientific Research under award number FA9550-21-1-0447, and by the National Science Foundation Graduate Research Fellowship under Grant No. DGE 1746045.

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Publication: Observation of sound propagation in a strongly interacting Bose-Fermi mixture
Krutik Patel, Geyue Cai, Henry Ando, Cheng Chin
ArXiv:2205.14518

Presenters

  • Geyue Cai

    • University of Chicago

Authors

  • Geyue Cai

    • University of Chicago

  • Henry Ando

    • University of Chicago

  • Krutik S Patel

    • University of Chicago

  • Michael Rautenberg

    • Heidelberg University

  • Sarah McCusker

    • University of Chicago

  • Cheng Chin

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