Acoustic spontaneous emission by a superconducting qubit

ORAL

Abstract

Superconducting circuits are a versatile tool in developing hybrid quantum platforms, including interfacing with the bulk acoustic waves (BAWs) of pristine crystalline substrates [1]. Recent experimental work has shown that transmons have a reduced lifetime in the presence of piezoelectric thin films used to transduce microwave photons into phonons [2]. Here, we have designed a qubit architecture that extends the qubit's lifetime (T1) by an order of magnitude as compared to the previous quantum acoustic BAW device [2].
With these improvements and an increase in the electro-mechanical coupling, we observe weak dispersive interactions between the qubit and phonon. Furthermore, we measure the qubit's acoustic density of states to investigate the role of electro-mechanical coupling in limiting coherence.
[1] Y. Chu, et al. Science (2017)
[2] Y. Chu, et al. Nature (2018)

*We acknowledge support from the US Dept of Energy Grant Nr. DE-SC0019406

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Presenters

  • Vijay Jain

    • Yale University

Authors

  • Vijay Jain

    • Yale University

  • Chan U Lei

    • Yale University
    • Applied Physics, Yale University

  • Taekwan Yoon

    • Yale University

  • Yanni Dahmani

    • Yale University

  • Nikolay V. Gnezdilov

    • Yale University

  • Vladislav Kurilovich

    • Yale University
    • Departments of Applied Physics and Physics, Yale University

  • Luigi Frunzio

    • Applied Physics Department, Yale University
    • Yale University
    • Applied Physics, Yale University
    • Department of Applied Physics and Physics, Yale University

  • Leonid Glazman

    • Yale University
    • Departments of Applied Physics and Physics, Yale University

  • Peter Rakich

    • Yale University

  • Robert J Schoelkopf

    • Yale University
    • Applied Physics, Yale University
    • Department of Applied Physics and Physics, Yale University