Year: 2016
Type: article
Abstract: We propose and analyze a new approach based on parity-time (PT) symmetric microcavities with balanced gain and loss to enhance the performance of cavity-assisted metrology. We identify the conditions under which PT-symmetric microcavities allow us to improve sensitivity beyond what is achievable in loss-only systems. We discuss the application of PT-symmetric microcavities to the detection of mechanical motion, and show that the sensitivity is significantly enhanced near the transition point from unbroken- to broken-PT regimes. Our results open a new direction for PT-symmetric physical systems and it may find use in ultrahigh precision metrology and sensing.
Source: Physical Review Letters
Authors: Zhong-Peng Liu, Jing Zhang, Şahin Kaya Özdemir, Bo Peng, Hui Jing, Xin-You Lü, Chun-Wen Li, Lan Yang, Franco Nori, Yu-xi Liu
Language: Latvian
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: John Templeton Foundation, National Natural Science Foundation of China, Tsinghua University, Tsinghua National Laboratory for Information Science and Technology, Japan Society for the Promotion of Science, RIKEN, National Key Research and Development Program of China, Air Force Office of Scientific Research, Army Research Office
OpenAlex ID: W2273068609