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1、6938tp.indd18/14/081:42:10PMThispageintentionallyleftblankAshokDasUniversityofRochester,USAWorldScientificNEWJERSEY•LONDON•SINGAPORE•BEIJING•SHANGHAI•HONGKONG•TAIPEI•CHENNAI6938tp.indd28/14/081:42:10PMPublishedbyWorldScientificPublishingCo.Pte.Ltd.5TohTuckLink,S
2、ingapore596224USAoffice:27WarrenStreet,Suite401-402,Hackensack,NJ07601UKoffice:57SheltonStreet,CoventGarden,LondonWC2H9HEBritishLibraryCataloguing-in-PublicationDataAcataloguerecordforthisbookisavailablefromtheBritishLibrary.LECTURESONQUANTUMFIELDTHEORYCopyright
3、©2008byWorldScientificPublishingCo.Pte.Ltd.Allrightsreserved.Thisbook,orpartsthereof,maynotbereproducedinanyformorbyanymeans,electronicormechanical,includingphotocopying,recordingoranyinformationstorageandretrievalsystemnowknownortobeinvented,withoutwrittenpermi
4、ssionfromthePublisher.Forphotocopyingofmaterialinthisvolume,pleasepayacopyingfeethroughtheCopyrightClearanceCenter,Inc.,222RosewoodDrive,Danvers,MA01923,USA.Inthiscasepermissiontophotocopyisnotrequiredfromthepublisher.ISBN-13978-981-283-285-6ISBN-10981-283-285-8
5、ISBN-13978-981-283-286-3(pbk)ISBN-10981-283-286-6(pbk)PrintedinSingapore.Lakshmi-LeconQuanFieldTheory.pmd112/15/2008,3:51PMToMyfriendsandcollaboratorsJosifandSusumuandtoEvercaringandcharmingKironandMomoThispageintentionallyleftblankPrefaceOverthepastseveralyears
6、Ihavetaughtatwo-semestergraduatecourseonquantumfieldtheoryattheUniversityofRochester.Inthiscoursetheideasofquantumfieldtheoryaredevelopedinatraditionalmannerthroughcanonicalquantization.Thisbookconsistsofmylecturesinthiscourse.AtRochester,wealsoteachaseparatecours
7、eonquantumfieldtheorybasedonthepathintegralapproachandmylecturesinthatcoursehavealreadybeenpublishedbyWorldScientificinA.Das,FieldTheory:APathIntegralApproach(SecondEdition),WorldScientific,Singapore(2006).Thematerialinthepresentbookshouldbethoughtofascomple-mentar
8、ytothisearlierbook.Infact,inthepresentlectures,thereisnoattempttodevelopthepathintegralmethods,ratherweusetheresultsfrompathintegralswithabriefdiscussionwhenneeded.Th
