Mach–Zehnder interferometer with squeezed and EPR entangled optical fields  

作　　者：于旭东 李卫 朱诗尧 张靖 

机构地区：[1]The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University [2]Collaborative Innovation Center of Extreme Optics, Shanxi University [3]Beijing Computational Science Research Center

出　　处：《Chinese Physics B》2016年第2期70-75,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2011CB921601);the National Natural Science Foundation of China(Grant Nos.11234008,11361161002,and 61571276);the Natural Science Foundation of Shanxi Province,China(Grant No.2015011007)

摘　　要：We study a scheme for Mach-Zehnder （MZ） interferometer as a quantum linear device by injecting two-mode squeezed input states into two ports of interferometer. Two-mode squeezed states can be changed into two types of in- puts for MZ interferometer： two squeezed states and Einstein-Podolsky-Rosen （EPR） entangled states. The interference patterns of the MZ interferometer vary periodically as the relative phase of the two arms of the interferometer is scanned, and are measured by the balanced homodyne detection system. Our experiments show that there are different interference patterns and periodicity of the output quantum states for two cases which depend on the relative phase of input optical fields. Since MZ interferometer can be used to realize some quantum operations, this work will have the important applications in quantum information and metrology.We study a scheme for Mach-Zehnder （MZ） interferometer as a quantum linear device by injecting two-mode squeezed input states into two ports of interferometer. Two-mode squeezed states can be changed into two types of in- puts for MZ interferometer： two squeezed states and Einstein-Podolsky-Rosen （EPR） entangled states. The interference patterns of the MZ interferometer vary periodically as the relative phase of the two arms of the interferometer is scanned, and are measured by the balanced homodyne detection system. Our experiments show that there are different interference patterns and periodicity of the output quantum states for two cases which depend on the relative phase of input optical fields. Since MZ interferometer can be used to realize some quantum operations, this work will have the important applications in quantum information and metrology.

关 键 词：quantum information INTERFEROMETERS 

分 类 号：TH744.3[机械工程—光学工程] O431.2[机械工程—仪器科学与技术]