资源描述:
《RevModPhys.17.187Field Concepts in Quantum Theory(1948)》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、REVIEWSOFMODERNPHYSICSVOLUME17,NUMBERS2AND3APRIL—JULY,1945:&ie..c.Conce~itsinQuantum'..'.&coryGUIDQBEcKC6rdobaObservatory,UniversityofC6rdoba,BuenosAires,Argentina1.INTRODUCTIONseriousdifficulties,assoonaswetrytoestablishHEpurposeofthepresentpaperisanano
2、ver-determinedphysicalpictureP(m,c,e,lt)attempttoanswerthequestion,whetherwhich,sometimes,hasbeen"denotedas"rela-tivisticquantumtheory.Thesedifficultiesariseornotfieldconcepts,introducedbyclassicalassoonaswetrytogeneralizeeitherordinaryelectrodynamics,ar
3、eessentialinordertode-scribethemicrostructureofmatterandradiation.quantummechanicsinagreementwiththetheoryItiswellknownthatquantumtheoryhasofrelativity,orifwewanttointroduceintothetheoryofradiationtheconceptofapointcharge.madetwoindependentattemptstodesc
4、ribeWeshallshowinthenextparagraph,thatthemicroscopicphenomena:onebymodifyingthelawsofelectrodynamicsbytheintr'oductionofdevelopmentofamoregeneralphysicalpicturethephotonconcept,theotherbyreformulatingdependsessentiallyonthechoiceofasetofthelawsofmechanic
5、s.BohrandRosenfeldhaveappropriatevariables.shown,thaibothofthesemodificationsof2.KINETIC,CANONICAL,ANDFIELDVARIABLESclassicaltheorycanbederivedfromonesingleprinciple,theuncertaintyprinciple,whichlimitsLetus,first,considerthevariableswhicharethe.simultane
6、ousknowledgeofcanonicconjugateimpliedinclassicalandrelativisticmechanics,quantities,indispensableforcausaldescription.orinthephysicalpicturestobedenotedasAlreadyasimpledimensionconsiderationP(m,e)andP(m,c,e).Onerealizesimmediately,shows,thatthereisroomin
7、non-relativisticthatthesevariablesarerespectivelymechanicsfortheintroductionofathirdcon-vand4,stantkinadditiontothetwoclassicalconstantsmande.Non-relativisticquantummechanicsI;.andA,.canbeconsidered,today,tobeade6nitivelyestablishedscheme.Makinguseofther
8、esultsInthefollowing,variablesofthetypevandn;ofarecentpaper,'weshalldenotethephysicalshallbecalledkineticvariables,whilevariablespicturetobeassociatedwithnon-relativisticofthetypeCandA;andthederivedquantitiesquantummechani