Quartz-superconductor quantum electromechanical system

Woolley, M. J., Emzir, M. F., Milburn, G. J., Jerger, M., Goryachev, M., Tobar, M. E. and Fedorov, A. (2016) Quartz-superconductor quantum electromechanical system. Physical Review B, 93 22: . doi:10.1103/PhysRevB.93.224518

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Author Woolley, M. J.
Emzir, M. F.
Milburn, G. J.
Jerger, M.
Goryachev, M.
Tobar, M. E.
Fedorov, A.
Title Quartz-superconductor quantum electromechanical system
Journal name Physical Review B   Check publisher's open access policy
ISSN 1550-235X
2469-9950
2469-9969
Publication date 2016-06-01
Year available 2016
Sub-type Article (original research)
DOI 10.1103/PhysRevB.93.224518
Open Access Status File (Publisher version)
Volume 93
Issue 22
Total pages 17
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2017
Language eng
Formatted abstract
We propose and analyze a quantum electromechanical system composed of a monolithic quartz bulk acoustic wave oscillator coupled to a superconducting transmon qubit via an intermediate LC electrical circuit. Monolithic quartz oscillators offer unprecedentedly high effective masses and quality factors for the investigation of mechanical oscillators in the quantum regime. Ground-state cooling of such mechanical modes via resonant piezoelectric coupling to an LC circuit, which is itself sideband cooled via coupling to a transmon qubit, is shown to be feasible. The fluorescence spectrum of the qubit, containing motional sideband contributions due to the couplings to the oscillator modes, is obtained and the imprint of the electromechanical steady state on the spectrum is determined. This allows the qubit to function both as a cooling resource for, and transducer of, the mechanical oscillator. The results described are relevant to any hybrid quantum system composed of a qubit coupled to two (coupled or uncoupled) thermal oscillator modes.
Keyword Quantum electromechanical system
Monolithic quartz bulk acoustic wave oscillator
LC electrical circuit
Mechanical oscillator
Quantum regime
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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