arXiv:1911.06412 · Physical Review Letters

Mechanical Squeezing via Fast Continuous Measurement

Chao Meng, George A. Brawley, James S. Bennett, Michael Ross Vanner, Warwick P. Bowen

Published Jul 24, 2020• 41 citations

Abstract

We revisit quantum state preparation of an oscillator by continuous linear position measurement. Quite general analytical expressions are derived for the conditioned state of the oscillator. Remarkably, we predict that quantum squeezing is possible outside of both the backaction dominated and quantum coherent oscillation regimes, relaxing experimental requirements even compared to ground-state cooling. This provides a new way to generate nonclassical states of macroscopic mechanical oscillators, and opens the door to quantum sensing and tests of quantum macroscopicity at room temperature.

DOI: 10.1103/physrevlett.125.043604

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arXiv:1911.06412 · Physical Review Letters

Mechanical Squeezing via Fast Continuous Measurement

Chao Meng, George A. Brawley, James S. Bennett, Michael Ross Vanner, Warwick P. Bowen

Published Jul 24, 2020• 41 citations

arXiv HTML PDF

Abstract

DOI: 10.1103/physrevlett.125.043604

Related papers

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470

times the zero-point amplitude

x_{\rm zpf}

with a purity of about 0.0004, by means of optimal state estimation through causal Wiener filtering. The purity of the squeezed state is clearly maximized by the Wiener filter, based on precisely identified optomechanical parameters. This is the first step for measurement-based quantum control of macroscopic pendulums, e.g. generation of an entanglement state between macroscopic pendulums. Such quantum control will provide a direct insight into the quantum to classical transition and will pave the way to test semiclassical gravity and gravity sourced by macroscopic quantum oscillators.