双光子纠缠实验教学系统的搭建与应用  

Construction and application of the two-photon entanglement system

作　　者：王伟[1] 刘国超[1] 傅兆瑢 王晨冰 李智[1] 张朝晖[1] WANG Wei;LIU Guo-chao;FU Zhao-rong;WANG Chen-bing;LI Zhi;ZHANG Zhao-hui(School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院,北京100871

出　　处：《物理实验》2022年第2期1-8,共8页Physics Experimentation

摘　　要：双光子纠缠实验教学系统主要涉及双光子纠缠态的制备、测量和分析,可以直观展示量子纠缠概念,排除局域隐变量假设.介绍了双光子纠缠系统的工作原理、纠缠态的制备和测量方法,搭建了双光子纠缠实验教学系统.该系统利用自发参量下转换效应制备出双光子偏振纠缠态并进行测量,性能稳定可靠.实验包含符合测量和复杂光路设计、调节等内容,有助于学生理解量子光学和非线性光学的基本概念,也锻炼了学生的动手能力和实验探究能力.The two-photon entanglement system mainly includes the preparation,measurement and analysis of two-photon entanglement states,which can intuitively display the concept of quantum entanglement and exclude the hypothesis of local hidden variables.The working principle of two-photon entanglement system,the preparation and measurement method of entanglement state were introduced,and a two-photon entanglement experimental teaching system was set up.The two-photon polarization entangled state was prepared and measured by using the spontaneous parametric down-conversion effect.The system was stable.The experimental teaching included experimental methods and techniques such as measurement and complex optical path design and adjustment,which could help students to understand the basic concepts of quantum optics and nonlinear optics,and also exercise students’hands-on ability and experimental exploration ability.

关 键 词：双光子纠缠 量子纠缠 BELL不等式 非线性光学 

分 类 号：O413[理学—理论物理]