简介:Quantumcomputingrequiresultracoldionsinagroundvibrationalstate,whichisachievedbysidebandcooling.WereportourrecenteffortstowardstheLamb-Dickeregimewhichisaprerequisiteofsidebandcooling.Wefirstanalysethepossibleimperfectioninourlineariontrapsetupandthendemonstratehowtosuppresstheimperfectionbycompensatingtheexcessmicromotionoftheions.Theions,afterthemicromotioncompensation,areestimatedtobeveryclosetotheDoppler-coolinglimit.