期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.123603
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资金
- Laboratory of Physical Sciences through Army Research Office [W911NF-14-1-0563]
- Air Force Office of Scientific Research (AFOSR) MURI Grant [FA9550-15-1-0029]
- US-Israel Binational Science Foundation [2012148]
- NSF MRSEC Grant [1119826]
- Packard Fellowship in Science and Engineering
High-frequency mechanical resonators subjected to low thermal phonon occupancy are easier to be prepared to the ground state by direct cryogenic cooling. Their extreme stiffness, however, poses a significant challenge for external interrogations. Here we demonstrate a superconducting cavity piezoelectromechanical system in which multiple modes of a bulk acoustic resonator oscillating at 10 GHz are coupled to a planar microwave superconducting resonator with a cooperativity exceeding 2 x 10(3), deep in the strong coupling regime. By implementation of the noncontact coupling scheme to reduce mechanical dissipation, the system exhibits excellent coherence characterized by a frequency-quality-factor product of 7.5 x 10(15) Hz. Interesting dynamics of classical temporal oscillations of the microwave energy is observed, implying the coherent conversion between phonons and photons. The demonstrated high-frequency cavity piezoelectromechanics is compatible with superconducting qubits, representing an important step towards hybrid quantum systems.
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