Circuit quantum acoustodynamics with surface acoustic waves

Riccardo Manenti (), Anton F. Kockum, Andrew Patterson, Tanja Behrle, Joseph Rahamim, Giovanna Tancredi, Franco Nori and Peter J. Leek ()
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Riccardo Manenti: University of Oxford
Anton F. Kockum: Center for Emergent Matter Science, RIKEN
Andrew Patterson: University of Oxford
Tanja Behrle: University of Oxford
Joseph Rahamim: University of Oxford
Giovanna Tancredi: University of Oxford
Franco Nori: Center for Emergent Matter Science, RIKEN
Peter J. Leek: University of Oxford

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract The experimental investigation of quantum devices incorporating mechanical resonators has opened up new frontiers in the study of quantum mechanics at a macroscopic level. It has recently been shown that surface acoustic waves (SAWs) can be piezoelectrically coupled to superconducting qubits, and confined in high-quality Fabry–Perot cavities in the quantum regime. Here we present measurements of a device in which a superconducting qubit is coupled to a SAW cavity, realising a surface acoustic version of cavity quantum electrodynamics. We use measurements of the AC Stark shift between the two systems to determine the coupling strength, which is in agreement with a theoretical model. This quantum acoustodynamics architecture may be used to develop new quantum acoustic devices in which quantum information is stored in trapped on-chip acoustic wavepackets, and manipulated in ways that are impossible with purely electromagnetic signals, due to the 105 times slower mechanical waves.

Date: 2017
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DOI: 10.1038/s41467-017-01063-9

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