简介:ViolationsofBellinequality,Cauchy-Schwarzinequalityandentanglementinatwo-modethree-levelatomicsystemareinvestigated.Itisshownthattherearesomestates,whichareentangledbutdonotviolateBellinequalityinthissystem.Moreover,therelationsofviolationsofBellinequality,Cauchy-Schwarzinequality,andentanglementarediscussedindetail.