非破坏测量的多粒子纠缠纯化方案-论文.pdf

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1、2014年7月安徽大学学报(自然科学版)July2014第38卷第4期JournalofAnhuiUniversity(NaturalScienceEdition)V01．38No．4doi：10．3969／j．issn．1000-2162．2014．04．008ThepurificationschemeofmultiphotonentanglementStJatJeb■ased一onquant‘umnond一emol一i‘ti‘on(QND)measurementYANFei，HUANGFeng(DepartmentofMathematicsandPhysics，AnhuiJia

2、nzhuUniversity，Hefei230601，China)Abstract：Basedonquantumnondemolition(QND)measurementsofphotonnumbers，amuhiphotonpolarizationentanglementpurificationschemewasproposedinthispaper．BecausetheWstatewasthebasisvectorofthenewmixedtripartiteentangledstate，wecalleditthemixedWstate．Here，theQNDdetectors

3、actednotonlyastheCNOToperationsbutassinglephotonnumberdetectors．Itwouldgreatlyreducethecomplexityoftherealizationofthepurificationscheme．AllthesemeritssuggestedthatthepurificationschemeforthemixedWstatescouldberealizedwiththecurrenttechnology．Keywords：quantumnondemolitionmeasurement；mixedWstat

4、e；cross—Kerrnonlinearity；quantumpurificationCLCnumber：0413Documentcode：AArticleID：1000—2162(2014)O4—0045—07非破坏测量的多粒子纠缠纯化方案严飞，黄凤(安徽建筑大学数理系，安徽合肥230601)摘要：提出了一种基于非破坏测量的多粒子纠缠混合态纯化方案．由于w态是该混合纠缠态的基本组成元素，所以称之为混合w纠缠态．利用交叉克尔非线性介质的字称检测功能和光子计数功能，实现了无须联合Bell态测量和复杂的单光子探测技术的混合w态纠缠纯化方案，从而降低了纠缠纯化的复杂性，有利于实现纠缠纯

5、化过程．关键词：量子非破坏测量；混合w态；交叉克尔非线性效应；量子纯化ReceiVeddate：2013-09—05Foundationitem：SupportedbyNationalNaturalScienceFoundationofChina(10704001，61073048，10905024，11005029)；theKeyProjectofChineseMinistryofEducation(210092)；theChinaPostdoctoralScienceFoundation(20110490825)；theKeyProgramoftheEducationDepar

6、tmentofAnhuiProvince(KJ2012A020，KJ2010A287，KJ2014A046，2010SQRL153ZD)；theDoctoralResearchFoundationofAnhuiJianzhuUniversity(K02630)；the“211Project”ofAnhuiUniversity(33190019)；thePersonnelDepartmentofAnhuiProvince；AnhuiKeyLaboratoryofInformationMaterialsandDevices(AnhuiUniversity)Author’Sbrief：Y

7、ANFei(1985一)，male，borninLujiangofAnhuiProvince，lecturerofAnhuiJianzhuUniversity，Ph．D．安徽大学学报(自然科学版)第38卷0IntroductionEntanglementpresentedbySchrodingerisacriticalmanifestationofquantummechanics．Duringthepastyears，quantumentanglementplayed