Title: Measurements of a quantum bulk acoustic resonator using a superconducting qubit

Abstract

Phonon modes at microwave frequencies can be cooled to their quantum ground state using conventional cryogenic refrigeration, providing a convenient way to study and manipulate quantum states at the single phonon level. Phonons are of particular interest because mechanical deformations can mediate interactions with a wide range of different quantum systems, including solid-state defects, superconducting qubits, and optical photons when using optomechanically active constructs. Phonons, thus, hold promise for quantum-focused applications as diverse as sensing, information processing, and communication. Here, we describe a piezoelectric quantum bulk acoustic resonator (QBAR) with a 4.88 GHz resonant frequency, which, at cryogenic temperatures, displays large electromechanical coupling strength combined with a high intrinsic mechanical quality factor, Q_i ≈ 4.3 × 10⁴. Using a recently developed flip-chip technique, we couple this QBAR resonator to a superconducting qubit on a separate die and demonstrate the quantum control of the mechanics in the coupled system. Furthermore, this approach promises a facile and flexible experimental approach to quantum acoustics and hybrid quantum systems.

Authors:

Chou, M. -H.  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-5646-4272"

Dumur, É.  ^[2];

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• Search DOE PAGES for ORCID "0000-0001-8010-9580"

Zhong, Y. P. ^[1]; Peairs, G. A.  ^[3];

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• Search DOE PAGES for ORCID "0000-0001-9958-9975"

Bienfait, A. ^[4]; Chang, H. -S.  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-9681-6108"

Conner, C. R.  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-6875-2298"

Grebel, J.  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-5272-5260"

Povey, R. G.  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-3382-3287"

Satzinger, K. J.  ^[5];

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• Search DOE PAGES for ORCID "0000-0001-5865-0813"

Cleland, A. N.  ^[2]

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• Search DOE PAGES for ORCID "0000-0003-4981-4294"

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+ Show Author Affiliations

1. Univ. of Chicago, IL (United States)
2. Univ. of Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
3. Univ. of Chicago, IL (United States); Univ. of California, Santa Barbara, CA (United States)
4. Univ. of Chicago, IL (United States); Univ. Claude Bernard, Lyon (France)
5. Univ. of Chicago, IL (United States); Univ. of California, Santa Barbara, CA (United States); Google, Santa Barbara, CA (United States)

Publication Date:

Mon Dec 21 00:00:00 EST 2020

Research Org.:

Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); U.S. Army Research Laboratory; Air Force Research Laboratory (AFRL), Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); Argonne National Laboratory, Laboratory Directed Research and Development (LDRD)

OSTI Identifier:

1797929

Alternate Identifier(s):

OSTI ID: 1737862

Grant/Contract Number:  

AC02-06CH11357; LDRD 2017-092-N0

Resource Type:

Accepted Manuscript

Journal Name:

Applied Physics Letters

Additional Journal Information:

Journal Volume: 117; Journal Issue: 25; Journal ID: ISSN 0003-6951

Publisher:

American Institute of Physics (AIP)

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Cryogenics; Quantum mechanical systems and processes; Phonons; Acoustic resonators; Microwave frequencies; Flip chip