基于弱非线性实现非破坏性测量两光子Bell态及三光子Greenberger-Horne-Zeilinger态  

Quantum nondemolition measurement of two-photon Bell-state and three-photon Greenberger-Horne-Zeilinger-state based on weak nonlinearities

作　　者：丁东[1,2] 闫凤利[2] 

机构地区：[1]华北科技学院基础部,北京101601 [2]河北师范大学物理科学与信息工程学院,石家庄050024

出　　处：《物理学报》2013年第10期27-31,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10971247);河北省自然科学基金(批准号:A2012205013,A2010000344);中央高校基本科研业务费专项资金(批准号:2011B025)资助的课题~~

摘　　要：基于弱非线性及线性光学元件提出非破坏性测量两光子Bell态及三光子Greenberger-Horne-Zeilinger(GHZ)态方案.方案中,首先应用光束分束器及交叉克尔非线性介质对两光子Bell态进行对称性分析,进而结合控制非门提出三光子分析方案实现对八个三光子GHZ态完全且非破坏性区分.The scheme for quantum nondemolition measurement of two-photon Bell-state and three-photon Greenberger-Horne-Zeilinger（GHZ）-state is proposed based on weak nonlinearities and linear-optics elements.We first describe a scheme of the symmetry analyzer for two-photon Bell-state by using beam splitters and cross-Kerr nonlinear medium.According to this symmetry analyzer for twophoton Bell-state and the controlled-NOT gates we construct a three-photon state analyzer which can completely and nondestructively discriminate eight three-photon GHZ states.

关 键 词：BELL态测量 Greenberger-Horne-Zeilinger态测量 弱非线性 量子非破坏性测量 

分 类 号：O431.2[机械工程—光学工程]