Effect of ion-trap parameters on energy distributions of ultra-cold atom-ion mixtures

摘要: The holy grail of ion-neutral systems is reaching the s-wave scattering regime. However, most these have a fundamental lower collision energy limit which higher than this This arises from time-dependant trapping potential ion, Paul trap. In work, we studied both theoretically and experimentally, way trap parameters affect distribution an ion that immersed in bath ultra-cold atoms. Heating rates distributions are calculated for various by molecular dynamics (MD) simulation takes into account attractive atom-ion potential. deviation thermal one discussed. Using MD simulation, heating different combinations also investigated. addition, performed measurements ground-state cooled $\ ^{88}$Sr$^+$ cloud ^{87}$Rb atoms, over wide range parameters, compare our results to simulation. Both experiment reveal no significant change slightly global observed, relative