Metrology with $\mathcal{PT}$-symmetric cavities: Enhanced sensitivity near the $\mathcal{PT}$-phase transition
Quantum Physics
2016-09-14 v1
Abstract
We propose and analyze a new approach based on parity-time () symmetric microcavities with balanced gain and loss to enhance the performance of cavity-assisted metrology. We identify the conditions under which -symmetric microcavities allow to improve sensitivity beyond what is achievable in loss-only systems. We discuss its application to the detection of mechanical motion, and show that the sensitivity is significantly enhanced in the vicinity of the transition point from unbroken- to broken- regimes. We believe that our results open a new direction for -symmetric physical systems and it may find use in ultra-high precision metrology and sensing.
Keywords
Cite
@article{arxiv.1510.05249,
title = {Metrology with $\mathcal{PT}$-symmetric cavities: Enhanced sensitivity near the $\mathcal{PT}$-phase transition},
author = {Zhong-Peng Liu and Jing Zhang and Şahin Kaya Özdemir and Bo Peng and Hui Jing and Xin-You Lü and Chun-Wen Li and Lan Yang and Franco Nori and Yu-xi Liu},
journal= {arXiv preprint arXiv:1510.05249},
year = {2016}
}