摘要
不同用户之间的信息操控关联性在安全量子通信中具有重要的意义。EPR导引是安全量子网络中必要的资源,即一方可以利用共享的纠缠来导引相距遥远的另一方。提出一种基于纠缠交换的量子开关方案,在两个空间分离的EPR纠缠交换过程中,设置一个可调谐分束器作为控制开关,观察了EPR导引方向与可调谐分束器反射率的依赖关系,并研究了不同用户之间导引方向的操控。该方案对安全量子通讯具有参考价值。
The information manipulation relevance among different users has profound significance in secure quantum communication.EPR steering,which means that one party can steer the state of a distant party by exploiting shared entanglement,is an important resource in a secure quantum network.In this work,we present a quantum switch scheme based on entanglement swapping,in which a tunable beam splitter is set as a control switch during the swapping of two space-separated EPR entangled states.The dependence of the EPR steering direction on the reflectivity of tunable beam splitter is observed,and the control of steering direction among different users is investigated.The proposed scheme has reference value for secure quantum communication.
作者
翟淑琴
袁楠
刘奎
Zhai Shuqin;Yuan Nan;Liu Kui(College of Physics and Electronic Engineering Shanxi University,Taiyuan Shanxi030006 China;State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Shanxi University,Taiyuan Shanxi030006 China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2021年第16期197-203,共7页
Acta Optica Sinica
基金
国家自然科学基金(12074233,91536222,11674205)
国家973计划(2016YFA0301404)
山西省自然科学基金(201801D121121)。
关键词
量子光学
EPR导引
量子开关
不对称性
纠缠交换
量子通讯
quantum optics
EPR steering
quantum switch
asymmetry
entanglement swapping
quantum communications
