First ab initio potentials, transition dipoles, and scattering rates for Al+ with Rb and Sr predict slow radiative charge transfer and molecular ion formation, with branching ratios favoring the ground molecular state.
Optical Traps for sympathetic Cooling of Ions with ultracold neutral Atoms
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abstract
We report the trapping of ultracold neutral $ \text{Rb}$ atoms and $ \text{Ba}^+ $ ions in a common optical potential in absence of any radiofrequency (RF) fields. We prepare $ \text{Ba}^+ $ at $ 370 ~ \mu K $ and demonstrate efficient sympathetic cooling by $100 ~ \mu K $ after one collision. Our approach is currently limited by the $ \text{Rb}$ density and related three-body losses, but it overcomes the fundamental limitation in RF traps set by RF-driven, micromotion-induced heating. It is applicable to a wide range of ion-atom species, and may enable novel ultracold chemistry experiments and complex many-body dynamics.
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physics.atom-ph 1years
2019 1verdicts
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Interactions and charge transfer dynamics of an Al$^+$ ion immersed in ultracold Rb and Sr atoms
First ab initio potentials, transition dipoles, and scattering rates for Al+ with Rb and Sr predict slow radiative charge transfer and molecular ion formation, with branching ratios favoring the ground molecular state.