Quantum theory of ultracold atom-ion collisions

Details Quantum theory of ultracold atom-ion collisions Quantum theory of ultracold atom-ion collisions

2008-06-25

arxiv.org/abs/0806.4002v2

Phys. Rev. A 79, 010702 (2009)

Physics

Atomic Physics

5 pages,3 figures, RevTex; minor corrections to the text, references added

Scientific paper

10.1103/PhysRevA.79.010702

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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