Measurement-based preparation of multimode mechanical states

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Meng, Chao
Brawley, George A
Khademi, Soroush
Bridge, Elizabeth M
Bennett, James S
Bowen, Warwick P
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2022
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Abstract

Nanomechanical resonators are a key tool for future quantum technologies, such as quantum force sensors and interfaces, and for studies of macroscopic quantum physics. The ability to prepare room temperature nonclassical states is a major outstanding challenge. It has been suggested that this could be achieved using a fast continuous measurement to break the usual symmetry between position and momentum. Here, we demonstrate this symmetry breaking and use it to prepare a thermally squeezed mechanical state. Our experiments take advantage of collective measurements on multiple mechanical modes, which we show can increase the measurement speed and improve state preparation. Theoretically, we show that this result extends to the quantum regime, relaxing the requirements to generate nonclassical states. We predict that multimode conditioning can enable room temperature quantum squeezing with existing technology. Our work paves the way toward room temperature quantum nanomechanical devices and toward their application in quantum technology and fundamental science.

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Science Advances

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8

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21

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© 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Quantum engineering systems (incl. computing and communications)

Science & Technology

Multidisciplinary Sciences

Science & Technology - Other Topics

QUANTUM CONTROL

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Meng, C; Brawley, GA; Khademi, S; Bridge, EM; Bennett, JS; Bowen, WP, Measurement-based preparation of multimode mechanical states, Science Advances, 2022, 8 (21)

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