We study how strong mechanical squeezing (beyond 3 dB) can be achieved through reservoir engineering in an optomechanical system which is far from the resolved-sideband regime. In our proposed setup, the effect of unwanted counter-rotating terms is suppressed by quantum interference from two auxiliary cavities. In the weak coupling regime we develop an analytical treatment based on the effective master equation approach, which allows us to obtain explicitly the condition of maximum squeezing.
@article{arxiv.1812.01242,
title = {Strong mechanical squeezing in an unresolved-sideband optomechanical system},
author = {Rong Zhang and Yinan Fang and Yang-Yang Wang and Stefano Chesi and Ying-Dan Wang},
journal= {arXiv preprint arXiv:1812.01242},
year = {2019}
}