有效场论、全息原理暴胀宇宙与暗能量.ppt

《有效场论、全息原理暴胀宇宙与暗能量.ppt》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、有效场论、全息原理暴胀宇宙与暗能量EffectiveFieldTheory&HolographicPrincipleAneffectivefieldtheorythatcansaturatetheequationnecessarilyincludesmanystateswithSchwarzschildradiusmuchlargerthantheboxsize.AneffectivequantumfieldtheoryisexpectedtobecapableofdescribingasystematatemperatureT,providedthatT≤

2、Λ，solongasT≫1/L.ThermalenergyEntropyThecorrespondingSchwarzschildradiusEntropyToavoidthesedifficultiesCohen-Kaplan-NelsonproposeastrongerconstraintontheIRcutoff1/LwhichexcludesallstatesthatliewithintheirSchwarzschildradius.SincethemaximumenergydensityintheeffectivetheoryisΛ^4,theco

3、nstraintonLisThermalenergy～～SchwarzschildradiusLocalquantumfieldtheoryappearsunlikelytobeagoodeffectivelowenergydescriptionofanysystemcontainingablackhole,andshouldprobablynotattempttodescribeparticlestateswhosevolumeissmallerthantheircorrespondingSchwarzschildradius.HolographicPri

4、nciple:(Cohen-Kaplan-Nelson,PRL1999)InEffectiveFieldTheory,UVCut-offisrelatedtotheIRCut-offduetothelimitsetbytheformationofaBlackHoleEffectiveTheorydescribesallstatesofsystemexceptthosealreadycollapsedtoaBlackHole.VacuumenergydensityviaquantumfluctuationEffectiveFieldTheory&Hologra

5、phicPrincipleHolographicDarkEnergyHolographicDarkEnergyModel:DarkenergydensityisgivenbythevacuumenergydensitycausedviaquantumfluctuationCharacteristiclengthscaleofuniverseChoosingdifferentcharacteristiclengthscaleLVariousHolographicDarkEnergyModelsReviewsee:M.Li,X.-D.Li,S.Wang,Y.W

6、ang,CTP.56,525-604(2011)[arXiv:1103.5870].M.Li,Phys.Lett.B603,1(2004)[arXiv:hep-th/0403127].R.-G.Cai,Phys.Lett.B657,228-231(2007)[arXiv:0707.4049[hep-th]].ModelparameterReducedPlanckmassHolographicDarkEnergyCharacterizedbyConformal-age-likeLength(CHDE)Z.P.Huang,YLW,arXiv:1202.2590,

7、Z.P.Huang,YLW,arXiv:1202.3517 [astro-ph.CO]Conformal-age-likelengthscaleofuniverseMotivatedfrom4Dspace-timevolumeofFRWUniverseHolographicDarkEnergyCharacterizedbyConformal-age-likeLength(CHDE)FractionalenergydensityofCHDEFriedmanEquationEquationofMotionofCHDEConservationofenergyden

8、sityFriedmanequationEoSfor