Qubit-assisted transduction for a detection of surface acoustic waves near the quantum limit

Atsushi Noguchi; Rekishu Yamazaki; Yutaka Tabuchi; Yasunobu Nakamura

doi:10.1103/PhysRevLett.119.180505

Qubit-assisted transduction for a detection of surface acoustic waves near the quantum limit

Quantum Physics 2017-11-08 v1

Authors: Atsushi Noguchi , Rekishu Yamazaki , Yutaka Tabuchi , Yasunobu Nakamura

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Abstract

We demonstrate ultra-sensitive 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 the MW resonator. Thermal fluctuations of the SAW resonator near the quantum limit are observed in the noise spectroscopy in the MW domain.

Keywords

surface acoustic waves quantum bit transduction quantum limit hybrid quantum system parametric coupling

Cite

@article{arxiv.1710.00467,
  title  = {Qubit-assisted transduction for a detection of surface acoustic waves near the quantum limit},
  author = {Atsushi Noguchi and Rekishu Yamazaki and Yutaka Tabuchi and Yasunobu Nakamura},
  journal= {arXiv preprint arXiv:1710.00467},
  year   = {2017}
}

Comments

5 pages, 4 figures

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