噪声引入对EPR导引的影响  

Influence of Introduced Noise on EPR Steering

作　　者：翟淑琴[1] 王薇 杨荣国[1] 翟泽辉[1] Zhai Shuqin;Wang Wei;Yang Rongguo;Zhai Zehui(College of Physics and Electronic Engineering, Shanxi University, Taiyuan, Shanxi 030006, Chin)

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《光学学报》2018年第4期330-335,共6页Acta Optica Sinica

基　　金：国家自然科学基金(61008006;11674205;11604190);国家自然科学基金重点项目(91536222);国家重点研发计划(2016YFA0301404);山西省"1331工程"重点学科建设计划

摘　　要：EPR(Einstein-Podolsky-Rosen)导引展现出一种不同于量子纠缠态与Bell非局域性的量子非局域性,其中单向EPR导引在量子秘密共享中尤为重要。提出了一种通过在EPR纠缠态的一方增加噪声来改变EPR导引特性的方案,在引入噪声之后,分析了导引参数与可变分束器的反射率之间的关系,并研究了EPR导引的方向由双向到单向的改变过程。该研究对非对称的量子非局域性操控以及量子信息传递过程中的量子控制具有重要意义。Einstein-Podolsky-Rosen（EPR）steering shows an intermediate type of quantum nonlocality which is distinct from both quantum entanglement and Bell＇s nonlocality,especially,one-way EPR steering has a significant influence on the secure quantum secret sharing.A scheme to effectively change the characteristic of EPR steering,which is implemented by adding noise to one part of an EPR state,is presented.With the introduction of the noise,the relationships between the steering parameters and the reflectivity of variable beam splitter are analyzed,and the change process of the EPR steering direction from two way to one way is investigated.This study is of great importance in the asymmetric quantum nonlocality control and the quantum control in the process of quantum information transmission.

关 键 词：量子光学 EPR导引 噪声 非对称性 量子信息 

分 类 号：O437[机械工程—光学工程]