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Active-feedback quantum control of an integrated low-frequency mechanical resonator

Physics

Active-feedback quantum control of an integrated low-frequency mechanical resonator

J. Guo, J. Chang, et al.

This groundbreaking research by Jingkun Guo, Jin Chang, Xiong Yao, and Simon Gröblacher showcases measurement-based feedback cooling in a fully integrated optomechanical device. Achieving an impressive minimal average phonon occupation confirms the quantum nature of mechanical motion, paving the way for innovative advancements in quantum-limited sensing applications.

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Playback language: English
Abstract
This paper demonstrates measurement-based feedback cooling on a fully integrated optomechanical device operating in the deep sideband-unresolved limit. Achieving a minimal average phonon occupation of 0.76 (pre-cooled with liquid helium) and 3.5 (liquid nitrogen), significant sideband asymmetry verifies the quantum character of the mechanical motion. The method and device are suitable for quantum-limited sensing applications.
Publisher
Nature Communications
Published On
Aug 05, 2023
Authors
Jingkun Guo, Jin Chang, Xiong Yao, Simon Gröblacher
Tags
feedback cooling
optomechanical device
quantum character
phonon occupation
sensing applications
mechanical motion
sideband asymmetry

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