Phase Sensitivity Improvement in Correlation-Enhanced Nonlinear Interferometers
Xinyun Liang,
Zhifei Yu,
Chun-Hua Yuan,
Weiping Zhang,
Liqing Chen
Affiliations
Xinyun Liang
State Key Laboratory of Precision Spectroscopy, Quantum Institute for Light and Atoms, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
Zhifei Yu
School of Physics, Hefei University of Technology, Hefei 230009, China
Chun-Hua Yuan
State Key Laboratory of Precision Spectroscopy, Quantum Institute for Light and Atoms, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
Weiping Zhang
Shanghai Branch, Hefei National Laboratory, Shanghai 201315, China
Liqing Chen
State Key Laboratory of Precision Spectroscopy, Quantum Institute for Light and Atoms, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
Interferometers are widely used as sensors in precision measurement. Compared with a conventional Mach–Zehnder interferometer, the sensitivity of a correlation-enhanced nonlinear interferometer can break the standard quantum limit. Phase sensitivity plays a significant role in the enhanced performance. In this paper, we review improvement in phase estimation technologies in correlation-enhanced nonlinear interferometers, including SU(1,1) interferometer and SU(1,1)-SU(2) hybrid interferometer, and so on, and the applications in quantum metrology and quantum sensing networks.
