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arXiv · 0806.4002

Quantum theory of ultracold atom-ion collisions

Zbigniew Idziaszek·Tommaso Calarco·Paul S. Julienne·Andrea Simoni
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Abstract

We study atom-ion scattering in the ultracold regime. To this aim, an analytical model based on the multichannel quantum defect formalism is developed and compared to close-coupled numerical calculations. We investigate the occurrence of magnetic Feshbach resonances focusing on the specific 40Ca+ - Na system. The presence of several resonances at experimentally accessible magnetic fields should allow the atom-ion interaction to be precisely tuned. A fully quantum-mechanical study of charge exchange processes shows that charge-exchange rates should remain small even in the presence of resonance effects. Most of our results can be cast in a system-independent form and are important for the realization of the charge-neutral ultracold systems.

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Zbigniew Idziaszek, Tommaso Calarco, Paul S. Julienne, Andrea Simoni. 2008-12-19. Quantum theory of ultracold atom-ion collisions. https://doi.org/10.1103/physreva.79.010702

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