We propose a method to decouple the nanomechanical resonator in optomechanical systems from the environmental noise by introducing a chaotic coherent feedback loop. We find that the chaotic controller in the feedback loop can modulate the dynamics of the controlled optomechanical system and induce a broadband response of the mechanical mode. This broadband response of the mechanical mode will cut off the coupling between the mechanical mode and the environment and thus suppress the environmental noise of the mechanical modes. As an application, we use the protected optomechanical system to act as a quantum memory. It's shown that the noise-decoupled optomechanical quantum memory is efficient for storing information transferred from coherent or squeezed light.
@article{arxiv.1504.04817,
title = {Noise suppression of on-chip mechanical resonators by chaotic coherent feedback},
author = {Nan Yang and Jing Zhang and Hui Wang and Yu-xi Liu and Re-Bing Wu and Lian-qing Liu and Chun-Wen Li and Franco Nori},
journal= {arXiv preprint arXiv:1504.04817},
year = {2015}
}