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1、ModernQuantumMechanicsRevisedEditionJ.J.SakuraiLate,UniversityofCalifornia,LosAngelesSanFuTuan,EditorUniversityofHawai�Manoa•......Addison-WesleyPublishingCompanyReading,Massachusetts•MenloPark,California•NewYorkDonMills,Ontario·Wokingham,England·Amsterdam·BonnSydney•Singapore•Tokyo•M
2、adrid•SanJuan•Milan•ParisSponsoringEditor:StuartW.JohnsonAssistantEditor:JenniferDugganSeniorProductionCoordinator:AmyWillcuttManufacturingManager:RoyLoganLibraryofCongressCataloging-in-PublicationDataSakurai,J.J.(JunJohn),1933-1982.Modernquantummechanics/J.J.Sakurai;SanFuTuan,editor.
3、Rev.ed.p.cm.Includesbibliographicalreferencesandindex.ISBN0-201-53929-21.Quantumtheory.I.Tuan,SanFu,1932-.II.Title.QC174.12.S251994530.1'2-dc2093-17803CIPCopyright©1994byAddison-WesleyPublishingCompany,Inc.Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsyst
4、em,ortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofthepublisher.PrintedintheUnitedStatesofAmerica.5678910-MA-9695ForewordJ.J.SakuraiwasalwaysaverywelcomeguesthereatCERN,forhewasoneofthoseraretheoriststowhom
5、theexperimentalfactsareevenmoreinterestingthanthetheoreticalgameitself.Nevertheless,hedelightedintheoreticalphysicsandinitsteaching,asubjectonwhichheheldstrongopinions.Hethoughtthatmuchtheoreticalphysicsteachingwasbothtoonarrowandtooremotefromapplication:"...weseeanumberofsophisticate
6、d,yetuneducated,theoreticianswhoareconversantintheLSZformalismoftheHeisenbergfieldoperators,butdonotknowwhyanexcitedatomradiates,orareignorantofthequantumtheoreticderivationofRayleigh'slawthataccountsforthebluenessofthesky."Andheinsistedthatthestudentmustbeabletousewhathasbeentaught:"
7、Thereaderwhohasreadthebookbutcannotdotheexerciseshaslearnednothing."HeputtheseprinciplestoworkinhisfinebookAdvancedQuantumMechanics(1967)andinInvariancePrinciplesandElementaryParticles(1964),bothofwhichhavebeenverymuchu�edintheCERNlibrary.Thisnewbook,ModernQuantumMechanics,shouldbeuse
8、deven