Enhanced phase estimation with coherently boosted two-mode squeezed beams and its application to optical gyroscopes

作     者：Xiao-Qi Xiao Elisha S. Matekole Jiankang Zhao Guihua Zeng Jonathan P. Dowling Hwang Lee 

作者机构：Department of Communication Engineering Shanghai Dianji University Shanghai 200240 China Hearne Institute for Theoretical Physics and Department of Physics and Astronomy Louisiana State University Baton Rouge Louisiana 70803 USA State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Sensing and Navigation Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200030 China National Institute of Information and Communications Technology Tokyo 184-8795 Japan NYU-ECNU Institute of Physics at NYU Shanghai Shanghai 200062 China CAS-Alibaba Quantum Computing Laboratory USTC Shanghai 201315 China 

出 版 物：《Physical Review A》 (Phys. Rev. A)

年 卷 期：2020年第102卷第2期

页      面：022614-022614页

核心收录：

基　　金：National Science Foundation, NSF, (1838435) National Science Foundation, NSF Air Force Office of Scientific Research, AFOSR Army Research Office, ARO, (W911NF-17-1-0541) Army Research Office, ARO 

主　　题：Quantum metrology 

摘      要：Quantum techniques, developed in recent decades, provide new approaches to achieving high-precision measurements beyond the classical bounds. In this paper, we theoretically demonstrate a metrology method for improving the sensitivity of the interferometric optical gyroscope, robust against the loss, by using coherent-light stimulated two-mode squeezed beams as the light source. The detection protocol is based on a simple intensity measurement, and the quantum noise is far below the shot-noise limit. The enhancement factors for different coherent light fields are analyzed in detail. Additionally, the influence of loss during the propagation in the optical path is studied, and the conditions for achieving sub-shot-noise measurement sensitivity are obtained. We also find that the phase sensitivity of the proposed gyroscope scheme becomes closer to the quantum Cramér-Rao bound with increasing of the photon number of the coherent beams.