Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions

Wilson, Kali E. and Guttridge, Alexander and Liu, I-Kang and Segal, Jack and Billam, Thomas P. and Parker, Nick G. and Proukakis, N. P. and Cornish, Simon L. (2021) Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions. Physical Review Research, 3 (3). 033096. ISSN 2643-1564 (https://doi.org/10.1103/PhysRevResearch.3.033096)

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Abstract

We probe the collective dynamics of a quantum degenerate Bose-Bose mixture of Cs-133 and Yb-174 with attractive interspecies interactions. Specifically, we excite vertical center-of-mass oscillations of the Cs condensate. We observe significant damping for the Cs dipole mode, due to the rapid transfer of energy to the larger Yb component and the ensuing acoustic dissipation. Numerical simulations based on coupled Gross-Pitaevskii equations provide excellent agreement with experiment and additionally reveal the possibility of late-time revivals (beating), which are found to be highly sensitive to the Cs and Yb atom number combinations. By further tuning the interaction strength of Cs using a broad Feshbach resonance, we explore the stability of the degenerate mixture. We observe collapse of the Cs condensate mediated by the attractive Cs-Yb interaction when a(Cs) < 50 a(0), well above the single-species collapse threshold, in good agreement with simulations.

  • Item type:Article
    ID code:77858
    Dates:
    Date
    Event
    1 September 2021
    Published
    27 July 2021
    Published Online
    9 June 2021
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:22 Sep 2021 10:31
    Last modified:09 Apr 2024 02:41
    URI:https://strathprints.strath.ac.uk/id/eprint/77858
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