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1、PhysicsReports497(2010)1–40ContentslistsavailableatScienceDirectPhysicsReportsjournalhomepage:www.elsevier.com/locate/physrepEntangledphotonsandquantumcommunicationZhen-ShengYuana,b,?,Xiao-HuiBaoa,b,Chao-YangLua,JunZhanga,Cheng-ZhiPenga,Jian-WeiPana,b,?aHefeiNationalLaboratoryforPh
2、ysicalSciencesatMicroscaleandDepartmentofModernPhysics,UniversityofScienceandTechnologyofChina,Hefei,Anhui230026,ChinabPhysikalischesInstitut,Universit?tHeidelberg,Philosophenweg12,69120Heidelberg,GermanyarticleinfoabstractArticlehistory:Thisarticlereviewstheprogressofquantumcommun
3、icationthatutilizesphotonicen-Accepted15July2010tanglement.Westartwithasurveyofvariousmethodsforgeneratingentangledphotons,Availableonline24July2010followedbyanintroductionofthetheoreticalprinciplesandtheexperimentalimplemen-editor:J.Eichlertationsofquantumkeydistribution.Wethenmov
4、eontoadiscussionofmoreinvolvedquantumcommunicationprotocolsincludingquantumdensecoding,teleportationandquantumcommunicationcomplexity.Afterthat,wereviewtheprogressinfree-spacequantumcommunication,decoherence-freesubspace,andquantumrepeaterprotocolswhichareessentialingredientsforlon
5、g-distancequantumcommunication.Practicalre-alizationsofquantumrepeaters,whichrequireaninterfacebetweenphotonsandquan-tummemories,arediscussedbriefly.Finally,wedrawconcludingremarksconsideringthetechnicalchallenges,andputforwardanoutlookonfurtherdevelopmentsofthisfield.?2010Elsevier
6、B.V.Allrightsreserved.Contents1.Introduction.............................................................................................................................................................................................22.Thecreationofentangledphotons.................
7、.......................................................................................................................................42.1.Spontaneousparametricdown-conversioninnonlinearmedia..........................................................................................
8、...42.2.Momentumentangleme
