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, Qi≈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. This approach promises a facile and flexible experimental approach to quantum acoustics and hybrid quantum systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 21, 2020
- Source ID
- 10.1063/5.0023827
Entities
People
- A. Bienfait
- Andrew Cleland
- C. R. Conner
- Etienne Dumur
- Gregory Peairs
- H-S Chang
- Joel Grebel
- Kevin J Satzinger
- M-H Chou
- Rhys G Povey
- Y. P. Zhong
Organizations
- Air Force Office of Scientific Research
- Argonne National Laboratory
- Army Research Office
- National Science Foundation
- University of Chicago