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作 者:周政[1] 安雪碧 钱泳君 陈巍[1] ZHOU Zheng;AN Xuebi;QIAN Yongjun;CHEN Wei(University of Science and Technology of China,Hefei 230026,China;AnhuiQasky Quantum Technology Co.Ltd.,Wuhu 241002,China)
机构地区:[1]中国科学技术大学,安徽合肥230026 [2]安徽问天量子科技股份有限公司,安徽芜湖241002
出 处:《无线电通信技术》2020年第6期652-657,共6页Radio Communications Technology
基 金:2019年安徽省高等学校省级质量工程项目。
摘 要:量子纠缠是量子信息研究的核心资源,是量子密码、量子隐形传态和线性光学量子计算等研究方向的基础。科研级量子纠缠源存在代价昂贵、对环境要求较为苛刻和量子光信号无法可视化等问题,严重限制了其在教学场景下的普及。针对上述问题,选取典型的I型偏硼酸钡(BBO)量子纠缠光源,对其实际器件和纠缠光源进行了建模,并利用量子态演化理论,给出了符合计数与实验系统关键器件之间的函数关系。该模型与实验数据保持了较好的一致性。这一方法和思路可推广到其他量子纠缠光源(如基于II型相位匹配晶体的量子纠缠光源)的仿真,可用于教学和科学实验装置的设计。Quantum entanglement is the core resource of quantum information research,the theoretical and experimental basis of quantum cryptography,quantum teleportation,and linear optical quantum computation.In the process of practical scientific research,education and teaching,there are many problems in the experimental device of entity quantum entanglement source,such as high cost,harsh requirements on the experimental environment,tending to be damaged with ease,and the inability to visualize the quantum optical signal.Besides,the experimental device designed for scientific experiments can not be theoretically simulated and tested.In order to solve above problems,this paper selects a typical type-I quantum entangled light source based on BBO crystal,builds a theoretical model for specific experimental devices,and uses quantum state evolution theory to give the functional relationship between coincidence counting and essential devices of the experimental system.The model is consistent with the experimental data.This method and idea can be extended to the virtual simulation of other quantum entangled light sources(such as the quantum entangled light source based on type II phase matching crystal).
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