Phonon-Josephson resonances in atomtronic circuits
arXiv:1607.06590 · doi:10.1103/PhysRevA.94.033603
Abstract
We study the resonant excitation of sound modes from Josephson oscillations in Bose-Einstein condensates. From the simulations for various setups using the Gross-Pitaevskii mean-field equations and Josephson equations we observe additional tunneling currents induced by resonant phonons. The proposed experiment may be used for spectroscopy of phonons as well as other low-energy collective excitations in Bose-Einstein condensates. We also argue that the observed effect may mask the observation of Shapiro resonances if not carefully controlled.
arXiv comment8 pages, 11 figures. Updated to match the published version
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