Nano-acoustic resonator with ultralong phonon lifetime
Abstract
The energy damping time in a mechanical resonator is critical to many precision metrology applications, such as timekeeping and force measurements. We present measurements of the phonon lifetime of a microwave-frequency, nanoscale silicon acoustic cavity incorporating a phononic bandgap acoustic shield. Using pulsed laser light to excite a colocalized optical mode of the cavity, we measured the internal acoustic modes with single-phonon sensitivity down to millikelvin temperatures, yielding a phonon lifetime of up to τ_(ph,0) ≈ 1.5 seconds (quality factor Q = 5 × 10¹⁰) and a coherence time of τ_(coh,0) ≈ 130 microseconds for bandgap-shielded cavities. These acoustically engineered nanoscale structures provide a window into the material origins of quantum noise and have potential applications ranging from tests of various collapse models of quantum mechanics to miniature quantum memory elements in hybrid superconducting quantum circuits.
Additional Information
© 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works https://www.sciencemag.org/about/science-licenses-journal-article-reuse. This is an article distributed under the terms of the Science Journals Default License. Received for publication May 10, 2020. Accepted for publication October 5, 2020. This work was supported by the ARO Quantum Opto-Mechanics with Atoms and Nanostructured Diamond MURI program (grant N00014-15-1-2761), the ARO-LPS Cross-Quantum Systems Science and Technology program (grant W911NF-18-1-0103), the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (grant PHY-1733907) with support of the Gordon and Betty Moore Foundation, and the Kavli Nanoscience Institute at Caltech. H.R. gratefully acknowledges support from the National Science Scholarship from A*STAR, Singapore. Author contributions: G.S.M., H.R., J.D.C., and O.P. came up with the concept and planned the experiment. G.S.M., H.R., J.L., H.Z., and J.D.C. performed the device design and fabrication. G.S.M. and H.R. performed the measurements. G.S.M., H.R., J.L., A.S., M.M., and O.P. analyzed the data. All authors contributed to the writing of the manuscript. Competing interests: G.S.M, H.R., J.L., A.S., M.M., and O.P. acknowledge two related patent applications that draw on the work presented in this article: U.S. Patent Application no. 16/293,457, "Techniques for Bidirectional Transduction of Quantum Level Signals Between Optical and Microwave Frequencies Using a Common Acoustic Intermediary"; U.S. Patent Application no. 16/293,455, "Techniques for Transduction and Storage of Quantum Level Signals". J.L. is also affiliated with Anyon Computing Inc., Pasadena, CA 91101, USA. Data and materials availability: Data and data analysis code are available through Zenodo (31). All other data that support the findings of this study are in the main text and supplementary materials.Attached Files
Submitted - 1901.04129.pdf
Supplemental Material - abc7312_MacCabe_SM.pdf
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Additional details
- Alternative title
- Phononic bandgap nano-acoustic cavity with ultralong phonon lifetime
- Eprint ID
- 92300
- Resolver ID
- CaltechAUTHORS:20190115-155728077
- N00014-15-1-2761
- Office of Naval Research (ONR)
- W911NF-18-1-0103
- Army Research Office (ARO)
- Institute for Quantum Information and Matter (IQIM)
- PHY-1733907
- NSF
- Gordon and Betty Moore Foundation
- Kavli Nanoscience Institute
- Agency for Science, Technology and Research (A*STAR)
- Created
-
2019-01-16Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Institute for Quantum Information and Matter, Kavli Nanoscience Institute