基于相位噪声情况下远程制备任意四比特团簇态的方案设计.pdf

本科生毕业论文论文题目基于相位噪声情况下远程制备任意四比特团簇态的方案设计姓名张路指导教师姓名姜敏学院名称电子信息学院年级/专业2014级通信工程论文提交日期2018年5月苏州大学本科生毕业设计（论文）中文摘要在相位噪声情况下，本文提出了一种以团簇态为量子信道的远程制备任意四比特团簇态的方案，同时分析相位噪声对远程制备的影响。在远程制备方案中，发送者知道待制备量子态的全部信息，通过使用事件建立的共享纠缠和一些经典通信来传输已知量子状态。本文考虑到理想和噪声两种情况，分别构造纯态和混合态的量子信道，巧妙地通过选取合适的测量基，帮助接收者Bob制备所需的目标态。最后，通过保真度来分析量子通信过程中输入态和输出态的相似程度。研究表明，相位噪声情况下输出态的保真度仅取决于幅度因子和噪声参数，而与相位噪声中的相位因子无关。此外，不同的测量基也会导致接收方获得不同的输出状态。关键词：量子态制备，团簇态，量子噪声，保真度1苏州大学本科生毕业设计（论文）AbstractInthecaseofphasenoise,thispaperproposesaschemetoremotelyprepareanarbitraryfour-bitclusterstateusingaclusterstateasaquantumchannel,andanalyzestheinfluenceofphasenoiseonremotepreparationatthesametime.IntheRSPscheme,thesenderknowsalltheinformationofthequantumstatetobeprepared,andtransmitstheknownquantumstatethroughtheuseofevent-createdsharedentanglementandsomeclassicalcommunications.Weconsiderboththeidealandthenoiseconditionstoconstructthepureandmixedstatequantumchannelsrespectively,andhelpthereceiverBobtopreparethedesiredtargetstatebyselectinganappropriatemeasurementbase.Finally,thedegreeofsimilaritybetweentheinputstateandtheoutputstateinthequantumcommunicationprocessisanalyzedbyfidelity.Studieshaveshownthatthefidelityoftheoutputstateinthecaseofphasenoisedependsonlyontheamplitudefactorandthenoiseparameter,butnotonthephasefactorinthephasenoise.Inaddition,differentmeasurementbasescanalsoenablethereceivertoobtaindifferentoutputstates.Keywords:statepreparation,clusterstate,quantumnoise,fidelity2苏州大学本科生毕业设计（论文）目录中文摘要.....................................................................................................................1Abstract......................................................................................................................2前言.............................................................................................................................41绪论.........................................................................................................................51.1研究背景.....................................