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Published September 2, 2016 | Submitted + Published + Supplemental Material
Journal Article Open

Quantum Nondemolition Measurement of a Quantum Squeezed State Beyond the 3 dB Limit


We use a reservoir engineering technique based on two-tone driving to generate and stabilize a quantum squeezed state of a micron-scale mechanical oscillator in a microwave optomechanical system. Using an independent backaction-evading measurement to directly quantify the squeezing, we observe 4.7±0.9 dB of squeezing below the zero-point level surpassing the 3 dB limit of standard parametric squeezing techniques. Our measurements also reveal evidence for an additional mechanical parametric effect. The interplay between this effect and the optomechanical interaction enhances the amount of squeezing obtained in the experiment.

Additional Information

© 2016 American Physical Society. Received 27 May 2016; published 30 August 2016. This work is supported by funding provided by the Institute for Quantum Information and Matter, a NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation (Grant No. NSF-IQIM 1125565), by the Defense Advanced Research Projects Agency (Grant No. DARPA-QUANTUM HR0011-10-1-0066), by the NSF (Grants No. NSF-DMR 1052647 and No. NSF-EEC 0832819), and by the Semiconductor Research Corporation and Defense Advanced Research Project Agency (DARPA) through STARnet Center for Function Accelerated nanoMaterial Engineering. J. S. was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT Future Planning (Grants No. 2016R1C1B2014713 and No. 2016R1A5A1008184). A. C., F. M., and A. K. acknowledge support from the DARPA ORCHID program through a grant from AFOSR, F. M. and A. K. from ITN cQOM and the ERC OPTOMECH, and A. C. from NSERC.

Attached Files

Published - PhysRevLett.117.100801.pdf

Submitted - 1605.08148v2.pdf

Supplemental Material - supp_v2.pdf


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August 20, 2023
October 20, 2023