在两个分离NV色心之间实现纠缠和量子态传递的有效方案李蓬勃*，张剑西安交通大学应用物理系，西安710049摘要：提出了实现两个分离NVcenter之间纠缠态以及量子态传递的有效方案。这个方案利用两个回音壁模式的球型介质微腔作为中介，而这两个球型介质微腔可以通过倏逝场或者光纤锥波导耦合。我们从理论上推到出了制约此体系演化的有效哈密顿量，并证明了在一定条件下基于此耦合体系可以实现两个NVcenter之间的纠缠态以及量子信息的传递。关键词：量子光学；氮空穴色心；纠缠态；量子信息传递：O437Efficientschemeforentangledstateandquantuminformationtransferbetweentwospatiallyseparatednitrogen-vacancycentersLiPengbo*,Zhang激anDepartmentofAppliedPhysics,Xi’an激aotongUniversity,Xi’an710049Abstract:Anefficientschemeisproposedtoachieveentanglementandquantuminformationtransferbetweentwoseparatednitrogenvacancy(NV)centerswithtwowhispering-gallery-mode(WGM)microresonators,whicharecoupledeitherbytheevanescentfieldsoftheWGMorbyanopticalfiber-taperwaveguide.Owingtotheexcellentcharacteristicsofthecoupledsystem,aneffectiveHamiltonianisderivedtheoretically,withwhichthepreparationofentangledstateandexchangeofinformationbetweentheNVcenterscanbeachievedunderappropriateconditions.Keywords:quantumoptics;Entangledstates;quantuminformationtransfer;NVcenters0IntroductionQuantumentanglementisoneofthemostfascinatingaspectsofquantumtheory.En-tangledstatesarenowwidelyusedforfundamentaltestsofquantummechanicsandplayan基金项目：SpecializedResearchFundfortheDoctoralProgramofHigherEducation(20110201120035)---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---作者简介：Correspondenceauthor：LiPengbo(1981-),male,associateprofessor,majorresearchdirection：quantumoptics.-1----本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---irreplaceableroleinquantuminformationscience,suchasquantumcryptography[1],quan-tumcomputation[2,3],quantumteleportation[4].Alargenumberofdifferentsystemshavebeeninvestigatedtocontrollablyprepareentangledstatesofmatterandimplementquantuminformationtransfer,amongwhichnegativelychargedNVcentersindiamondhaverecentlybecomealeadingsolid-statespinsystemforquantuminformationprocessing[5].Thecompos-itesystem,inwhichNVcentersindiamondarecoupledtoaWGMmicroresonator,takestheadvantageofbothsidesofNVcentersandWGMmicroresonators,i.e.,theexceptionalspinpropertiesofNVcentersandtheultrahighqualityfactorandsmallmodevolumeofWGMmicroresonators.Therefore,theapplicationofthissolidstatecavityQEDsysteminquantumstateengineeringandquantuminformationprocessingisofgreatinterest.SeveralschemesforrealizationofentanglementandquantuminformationtransferwithNVcenterscoupledtoasinglemicroresonatorhavebeenproposed[6,7,8].Inthiswork,weproposeadifferentapproachtoachieveentanglementandquantuminfor-mationtransferbetweentwospatiallyseparatedNVcenterswithtwoWGMmicroresonators,whicharecoupledeitherbytheevanescentfieldsoftheWGM,orbyanopticalfiber-taperwaveguide.Weshowthataneffectivedipole-dipoleinteractionbetweentheNVcentersmedi-atedbythecoupledWGMscanbeobtained.ThisnonlocalinteractioncombinedwithlasersisusedtoinduceRamantransitionsbetweentwocentersviatheexchangeofvirtualphotons.WediscusshowtorealizeentanglementandtransferarbitraryquantuminformationencodedinspinstatesoftheelectronicgroundtripletfromoneNVcentertotheotherbasedonthisscheme.Thisproposalcouldbeimplementedinadeterministicfashion,thusrequiringnomea-surementsonc...