Journal
PHYSICAL REVIEW LETTERS
Volume 119, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.180505
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Funding
- JSPS KAKENHI [26220601]
- JST PRESTO [JPMJPR1429, JPMJPR1667]
- JST ERATO [JPMJER1601]
- Grants-in-Aid for Scientific Research [26220601] Funding Source: KAKEN
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We demonstrate ultrasensitive measurement of fluctuations in a surface-acoustic-wave (SAW) resonator using a hybrid quantum system consisting of the SAW resonator, a microwave (MW) resonator, and a superconducting qubit. The nonlinearity of the driven qubit induces parametric coupling, which up-converts the excitation in the SAW resonator to that in theMWresonator. Thermal fluctuations of the SAW resonator near the quantum limit are observed in the noise spectroscopy in the MW domain.
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