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1、QuantumFieldTheoryofMany-bodySystemsThispageintentionallyleftblankQuantumFieldTheoryofMany-bodySystemsFromtheOriginofSoundtoanOriginofLightandElectronsXiao-GangWenDepartmentofPhysics,MITOXPORDUNIVERSITYPRESSOXFORDUNIVERSITYPRESSGreatClarendonStreet,OxfordOX26DPOxford
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4、orhavebeenassertedDatabaserightOxfordUniversityPress(maker)Firstpublished2004Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyformorbyanymeans,withoutthepriorpermissioninwritingofOxfordUniversityPress,orasexpresslyp
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7、iThispageintentionallyleftblankPREFACEThequantumtheoryofcondensedmatter(i.e.solidsandliquids)hasbeendomi-natedbytwomainthemes.Thefirstoneisbandtheoryandperturbationtheory.ItislooselybasedonLandau'sFermiliquidtheory.ThesecondthemeisLandau'ssymmetry-breakingtheoryandre
8、normalizationgrouptheory.Condensedmattertheoryisaverysuccessfultheory.Itallowsustounderstandthepropertiesofalmostallformsofmatter.O