Gauthier, Guillaume; Szigeti, Stuart; Reeves, Matthew T.; Baker, Mark; Bell, Thomas A.; Rubinsztein-Dunlop, Halina; Davis, Matthew J.; Neely, Tyler W.
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...[Show more]
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