Journal
PHYSICAL REVIEW A
Volume 79, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.010702
Keywords
atom-ion collisions; calcium; charge exchange; numerical analysis; optical lattices; positive ions; quantum theory; resonant states; sodium
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Funding
- Office of Naval Research
- Polish Government 2007-2010
- European Commission
- National Science Foundation
- Smithsonian Astrophysical Observatory
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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 Ca-40(+)+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 charge-neutral ultracold systems.
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