费恩曼物理学讲义（第3卷）（英文版）

　　Agreattriumphoftwentieth-centuryphysics，thetheoryofquantummechanics，isnownearly40yearsold，yetwehavegenerallybeengivingourstudentstheirintroductorycourseinphysics(formanystudents，theirlast)withhardlymorethanacasualallusiontothiscentralpartofourknowledgeofthephysicalworld.Weshoulddobetterbythem.Theselecturesareanattempttopresentthemwiththebasicandessentialideasofthequantummechanicsinawaythatwould，hopefully，becomprehensible.Theapproachyouwillfindhereisnovel，particularlyatthelevelofasophomorecourse，andwasconsideredverymuchanexperiment.Afterseeinghoweasilysomeofthestudentstaketoit，however，Ibelievethattheexperimentwasasuccess.Thereis，ofcourse，roomforimprovement，anditwillcomewithmoreexperienceintheclassroom.Whatyouwillfindhereisarecordofthatfirstexperiment..
　　Inthetwo-yearsequenceoftheFeynmanLecturesonPhysicswhichweregivenfromSeptember1961throughMay1963fortheintroductoryphysicscourseatCaltech，theconceptsofquantumphysicswerebroughtinwhenevertheywerenecessaryforanunderstandingofthephenomenabeingdescribed.Inaddition，thelasttwelvelecturesofthesecondyearweregivenovertoamorecoherentintroductiontosomeoftheconceptsofquantummechanics.Itbecameclearasthelecturesdrewtoaclose，however，thatnotenoughtimehadbeenleftforthequantummechanics.Asthematerialwasprepared，itwascontinuallydiscoveredthatotherimportantandinterestingtopicscouldbetreatedwiththeelementarytoolsthathadbeendeveloped.TherewasalsoafearthatthetoobrieftreatmentoftheSchrodingerwavefunctionwhichhadbeenincludedinthetwelfthlecturewouldnotprovideasufficientbridgetothemoreconventionaltreatmentsofmanybooksthestudentsmighthopetoread.Itwasthereforedecidedtoextendtheserieswithsevenadditionallectures;theyweregiventothesophomoreclassinMayof1964.Theselecturesroundedoutandextendedsomewhatthematerialdevelopedintheearlierlectures.

Feynman et al,Thees are the lectures in physics that I gave last year and the year before to the freshman and sophomore classes at Caltech.The lectures are,of course,not verbatim-they have been edited,sometimes extensively and sometimes lessso.The lecture

CHAPTER1.QUANTUM BEHAVIOR.
CHAPTER2.THE RELATION OF WAVE AND PARTICLE VIEWPOINTS
CHAPTER3.PROBABILITY AMPLITUDES
CHAPTER4.IDENTICAL PARTICLES
CHAPTER5.SPI NONE
CHAPTER6.SPIN ONE-HtLF
CHAPTER7.THE DEPENDENCE OFAMPLITUDES ON TIME
CHAPTER8.THE HnMILTONIAN MATRIX
CHAPTER9.THE AMMONIA MASER
CHAPTER10.OTHER TwO-STATE SYSTEMS
CHAPTER11.MoPE TwO-STATE SYSTEMS
CHAPTER12.THE HYPERFINE SPLITTING IN HYDROGEN
CHAPTER13.PROPAGATION IN A CRYSTAL LATTICE
CHAPTER14.SEMICONDUCTORS
CHAPTER15.THE INDEPENDENT PARTICLE APPROXIMATION
CHAPTER16.THE DEPENDENCE OF AMPLITUDES ON POSITION
CHAPTER17.SYMMETRY AND CONSERVATION LAWS
CHAPTER18.ANGULAR MOMENTUM
CHAPTER19.THE HYDROGEN ATOM AND THE PERIODIC TABLE
CHAPTER20.OPERATORS
CHAPTER21.THE SCHRtDINGER EQUATION IN A CLASSICAL CONTEXT:A SEMINARONSUPERCONDUCTIVITY
FEYNMAN’SEPILOGUE
APPENDIX
INDEX