Second-order temporal interference of two independent light beams at an asymmetrical beam splitter  

作　　者：Jianbin Liu Jingjing Wang Zhuo Xu 刘建彬;王婧婧;徐卓(Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education Xi＇an Jiaotong University, Xi＇an 710049, China International Center for Dielectric Research, Xi＇an Jiaotong University, Xi ＇an 710049, China)

机构地区：[1]Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education Xi'an Jiaotong University, Xi'an 710049, China [2]International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, China

出　　处：《Chinese Physics B》2017年第1期187-193,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11404255);the Doctor Foundation of Education Ministry of China(Grant No.20130201120013);the Programme of Introducing Talents of Discipline to Universities,China(Grant No.B14040);the Fundamental Research Funds for the Central Universities,China

摘　　要：The second-order temporal interference of classical and nonclassical light at an asymmetrical beam splitter is discussed based on two-photon interference in Feynman＇s path integral theory. The visibility of the second-order interference pattern is determined by the properties of the superposed light beams, the ratio between the intensities of these two light beams, and the reflectivity of the asymmetrical beam splitter. Some requirements about the asymmetrical beam splitter have to be satisfied in order to ensure that the visibility of the second-order interference pattern of nonclassical light beams exceeds the classical limit. The visibility of the second-order interference pattern of photons emitted by two independent single-photon sources is independent of the ratio between the intensities. These conclusions are important for the researches and applications in quantum optics and quantum information when an asymmetrical beam splitter is employed.The second-order temporal interference of classical and nonclassical light at an asymmetrical beam splitter is discussed based on two-photon interference in Feynman＇s path integral theory. The visibility of the second-order interference pattern is determined by the properties of the superposed light beams, the ratio between the intensities of these two light beams, and the reflectivity of the asymmetrical beam splitter. Some requirements about the asymmetrical beam splitter have to be satisfied in order to ensure that the visibility of the second-order interference pattern of nonclassical light beams exceeds the classical limit. The visibility of the second-order interference pattern of photons emitted by two independent single-photon sources is independent of the ratio between the intensities. These conclusions are important for the researches and applications in quantum optics and quantum information when an asymmetrical beam splitter is employed.

关 键 词：two-photon interference Feynman＇s path integral theory asymmetrical beam splitter 

分 类 号：O436.1[机械工程—光学工程]