Quantitative Acoustic Models for Superfluid Circuits

Guillaume Gauthier, Stuart S. Szigeti, Matthew T. Reeves, Mark Baker, Thomas A. Bell, Halina Rubinsztein-Dunlop, Matthew J. Davis, Tyler W. Neely

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)

    Abstract

    We experimentally realize a highly tunable superfluid oscillator circuit in a quantum gas of ultracold atoms and develop and verify a simple lumped-element description of this circuit. At low oscillator currents, we demonstrate that the circuit is accurately described as a Helmholtz resonator, a fundamental element of acoustic circuits. At larger currents, the breakdown of the Helmholtz regime is heralded by a turbulent shedding of vortices and density waves. Although a simple phase-slip model offers qualitative insights into the circuit's resistive behavior, our results indicate deviations from the phase-slip model. A full understanding of the dissipation in superfluid circuits will thus require the development of empirical models of the turbulent dynamics in this system, as have been developed for classical acoustic systems.

    Original languageEnglish
    Article number260402
    JournalPhysical Review Letters
    Volume123
    Issue number26
    DOIs
    Publication statusPublished - 27 Dec 2019

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