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1、GravityandThermodynamics//GRasGeometro-HYDRO-dynamics*B.L.Hu胡悲樂MarylandCenterforFundamentalPhysicsandJointQuantumInstitute,UniversityofMaryland,CollegePark,USADICE2010,Tuscany,Italy,Sept2010,PeyresqPhysics15,FranceJune2010,Mariofest,Rosario,ArgentinaMarch2010*“
2、GENERALRELATIVITYASGEOMETRO-HYDRODYNAMICS”InvitedtalkattheSecondSakharovInternationalConferenceLebedevPhysicalInstitute,May,1996.gr-qc/9607070[1960s:J.A.Wheeler,GeneralRelativityas“Geometro-dynamics”]Quantum/EmergentGravity:Micro/MacroStructureofSpacetimeJ.Phys
3、.Conf.Ser.174(2009)012015arXiv:0903.0878“AfterDeconstructingQuantumGravity,-WhatisGravity?WhatistheQuantum?”---CastagninoFestMarch2010Rosario,Argentina•Note:Hydrodynamicsherereferstothelongwavelengthlowenergylimitofamicro-theorydescribingthesubstructureofspacet
4、imeandmatter,NotthehydrodynamicsofconformalfieldsthroughtheAds/CFTcorrespondence.1)Quantum/EmergentGravity:Micro/MacroStructureofSpacetimeRedefiningthegoalsandtasksofQGravity.ReviewinIJMPD(Dec2010)2)WhatistherelationbetweenGravity,ThermodynamicsandQuantum?Revis
5、itinganoldtheme.Newinsights?3)WhatisGravity?WhatisQuantum?--BothconsideredfromaNEqSMviewpoint.Bothviewedasemergent(‘tHooft:QFTemergent)?InthistalkIwillsummarize1)anddiscuss2)withoutworryingabouttheQpart.ThreeParts:1.QG:WhatisQuantumGravity?EmergentGravity?Macro
6、/MicroStructureofSpacetimeQuantumGravity:MacroÆMicroEmergentGravity:MicroÆMacro2.Q-G-T:OneTrinityandTwoTriadsA.QFTandThermodynamics:BlackHole(Bekenstein-Hawking)QFTandKinematics(Unruh)70sB.Q+TÆG:Jacobson95/Padmanabhan,Verlinde2010GravityasEntropicForce.Critique
7、onVerlinde’sscheme3.GravityandThermodynamics:Myapproach/Myphilosophy:Twostages:A.Noquantum,noBHU,noholography,noquantuminformation,B.Quantumfluctuationsofthevacuumsubjectedtogeometricconstraints:EntanglementEntropy,QuantumInformation.A.Studysystemswithnegativeh
8、eatcapacity(NHC),Systemswithlongrangeinteractions(LRI),Fromself-gravitatingsystemsderiveBHTD.>>GravityisClassicalNonequilibriumPhysics<
