資源描述：
《quantum_erasure_by_transverse_indistinguishability》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、QuantumerasurebytransverseindistinguishabilityP.H.SoutoRibeiro1?,S.P′adua2,andC.H.Monken21InstitutodeF′?sica,UniversidadeFederaldoRiodeJaneiro,CaixaPostal68528,RiodeJaneiro,RJ22945-970,Brazil2DepartamentodeF′?sica,UniversidadeFederaldeMinasGerais,CaixaPostal702,BeloHor
2、izonte,MG30123-970,Brazil(February1,2008)Weshowthatthe?rstexperimentwithdouble-slitsandtwinphotonsdetectedincoincidencecanbeunderstoodasaquantumeraser.The“whichpath”informationiserasedbytransverseindistinguishabilityobtainedbymeansofmode?lteringinthetwinconjugatedbeam.
3、Adelayedchoicequantumeraserbasedonthesameschemeisproposed.42.50.Ar,42.25.KbI.INTRODUCTIONII.THEDOUBLE-SLITEXPERIMENTWITHTWINPHOTONSStudyingQuantumPhysicsexperimentallyhasbecomemucheasierwiththeuseofthetwinphotonsproducedLetusbrie?yrecallthemainideabehindtheexper-inthes
4、pontaneousparametricdown-conversionprocess.imentdescribedinRef.[5].Fig.1showsasketchofManyoftheexperimentsperformedsofar,arerealiza-theset-up.Twinphotonsareproducedintheprocessoftionsofdi?erentkindsofinterferometers.Theseinter-spontaneousparametricdown-conversionandthe
5、yareferometersallowustoimproveourunderstandingofthedetectedincoincidence.Thesignalphotonispassednatureoflightandmatter.Itisconvenienttothinkthesethroughadouble-slitandtheidlerphotongoesstraightinterferometers,asdividedintwocategories:theonestothedetector.Coincidencefri
6、ngesaredetectedbydis-utilizingthelongitudinaldegreesoffreedomofthe?eldplacingtransverselythesignaldetector,whichisaftertheandtheonesutilizingitstransversedegreesoffreedom.slitsandkeepingtheidlerdetector?xed.ItwasshownWecalllongitudinalinterferometers,theonesofthethatth
7、ecoincidencepro?leexhibitedinterferencefringes,typeofMichelson’sandMach-Zehnder’sinterferometers.evenwhenintensityfringeswerenotobserved.Alargenumberofexperimentswithtwinphotonshasbeenperformedwiththem.SomeexamplesarethoseofRefs.[1–3].Thetransverseinterferometers,areth
8、eonesofthekindofthedouble-slitorYounginterferometers.SomeexamplesaregiveninRefs.[4–10].Theseinterfer-ometersareimport
