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1、ThispageintentionallyleftblankQuantumProcesses,Systems,andInformationAnewandexcitingapproachtothebasicsofquantumtheory,thisundergraduatetextbookcontainsextensivediscussionsofconceptualpuzzlesandover800exercisesandproblems.Beginningwiththreeelementary“qubit”system
2、s,thebookdevelopstheformalismofquantumtheory,addressesquestionsofmeasurementanddistinguishability,andexploresthedynamicsofquantumsystems.Inadditiontothestandardtopicscoveredinothertextbooks,italsocoverscommunicationandmeasurement,quantumentanglement,entropyandthe
3、rmodynamics,andquantuminformationprocessing.Thistextbookgivesabroadviewofquantumtheorybyemphasizingdynamicalevolution,andexploringconceptualandfoundationalissues.Itfocusesoncontemporarytopics,includingmeasurement,timeevolution,opensystems,quantumentanglement,andt
4、heroleofinformation.BenjaminSchumacherisProfessorofPhysicsatKenyonCollege.Hecoinedtheterm“qubit”andinventedquantumdatacompression,amongothercontributionstoquantuminformationtheory.MichaelD.WestmorelandisProfessorofMathematicsatDenisonUniversity.Trainedasanalgebra
5、ist,formanyyearshehasresearchednonstandardlogics,modelsofcomputation,andquantuminformationtheory.Theauthorsarelong-timeresearchcollaboratorsandhavemadenumerousjointcontri-butionstoquantumchannelcapacitytheoremsandotheraspectsofquantuminformationscience.QuantumPro
6、cesses,Systems,andInformationBENJAMINSCHUMACHERKenyonCollegeMICHAELD.WESTMORELANDDenisonUniversityCAMBRIDGEUNIVERSITYPRESSCambridge,NewYork,Melbourne,Madrid,CapeTown,Singapore,SãoPaulo,Delhi,Dubai,TokyoCambridgeUniversityPressTheEdinburghBuilding,CambridgeCB28RU,
7、UKPublishedintheUnitedStatesofAmericabyCambridgeUniversityPress,NewYorkwww.cambridge.orgInformationonthistitle:www.cambridge.org/9780521875349©B.SchumacherandM.Westmoreland2010Thispublicationisincopyright.Subjecttostatutoryexceptionandtotheprovisionofrelevantcoll
8、ectivelicensingagreements,noreproductionofanypartmaytakeplacewithoutthewrittenpermissionofCambridgeUniversityPress.Firstpublishedinprintformat2010ISBN-13978-0-