Amplifier is at the heart of almost all experiment carrying out the precise measurement of a weak signal. An idea amplifier should have large gain and minimum added noise simultaneously. Here, we consider the quantum measurement properties of a hybrid nonlinear cavity with the Kerr and OPA nonlinear media to amplify an input signal. We show that our hybrid-nonlinear-cavity amplifier has large gain in the single-value stable regime and achieves quantum limit unconditionally.
@article{arxiv.1605.00199,
title = {Approaching quantum-limited amplification with large gain catalyzed by hybrid nonlinear media in cavity optomechanics},
author = {Qiang Zheng and Kai Li and Yong Li},
journal= {arXiv preprint arXiv:1605.00199},
year = {2018}
}