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《Deterministic and Storable Single-Photon Source Based on a Quantum Memory》由會員上傳分享，免費在線閱讀，更多相關內容在學術論文-天天文庫。
1、PHYSICALREVIEWLETTERSweekendingPRL97,173004(2006)27OCTOBER2006DeterministicandStorableSingle-PhotonSourceBasedonaQuantumMemoryShuaiChen,1Yu-AoChen,1ThorstenStrassel,1Zhen-ShengYuan,1,2,*BoZhao,11,31,2,Jo¨rgSchmiedmayer,andJian-WeiPan1PhysikalischesInstitut,Ruprecht-Karls-Universita¨tHeidel
2、berg,Philosophenweg12,69120Heidelberg,Germany2DepartmentofModernPhysicsandHefeiNationalLaboratoryforPhysicalSciencesatMicroscale,UniversityofScienceandTechnologyofChina,Hefei,Anhui230026,China3AtominstitutderO¨sterreichischenUniversita¨ten,TU-Wien,A-1020Vienna,Austria(Received4July2006;pub
3、lished27October2006)Asingle-photonsourceisrealizedwithacoldatomicensemble(87Rbatoms).Asingleexcitation,writteninanatomicquantummemorybyRamanscatteringofalaserpulse,isretrieveddeterministicallyasasinglephotonatapredeterminedtime.Itisshownthattheproductionrateofsinglephotonscanbeenhancedcons
4、iderablybyafeedbackcircuitwhilethesingle-photonqualityisconserved.Suchasingle-photonsourceiswellsuitedforfuturelarge-scalerealizationofquantumcommunicationandlinearopticalquantumcomputation.DOI:10.1103/PhysRevLett.97.173004PACSnumbers:32.80.Pj,03.67.Hk,42.50.DvAlthoughweakcoherentbeamscanb
5、eusedasapseudoindicatedbythedetectionofacorrespondingRamanpho-single-photonsource,theadventofquantuminformationton.Thisinformationisusedasfeedbacktostoptheprocessing(QIP)hasplacedstringentrequirementsonsequence,andfurtherontostartthenextprocess,forsinglephotonseitherondemandorheralded[1].I
6、npar-example,toconvertthespinexcitationbackintoasingleticular,linearopticalquantumcomputation[2]dependsonphoton.Suchasequencecanbetakenashavingafeedfor-theavailabilityofsuchsingle-photonsources.Thesingle-wardabilityforthedeterministicallyconvertedsinglephotonnatureguaranteesunconditionalse
7、curityandhighphoton.ef?ciencyinquantumcryptography[3].Differentap-Recently,signi?cantexperimentalprogresseshavebeenproacheshavebeenattemptedinthelastdecadetodevelopachievedindemonstrationofquantumstorageandsingle-anon-demandsingle-photonsource,suchasquantumdot
