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 non-classical states of macroscopic mechanical oscillators, and opens the door to quantum sensing and tests of quantum macroscopicity at room temperature.
@article{arxiv.1911.06412,
title = {Mechanical squeezing via fast continuous measurement},
author = {Chao Meng and George A. Brawley and James S. Bennett and Michael R. Vanner and Warwick P. Bowen},
journal= {arXiv preprint arXiv:1911.06412},
year = {2020}
}