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Bulletin of the American Physical Society

Ultracold collisions of molecular radicals with alkali-metal atoms in a magnetic field

Masato Morita, Jacek A. Kłos, Piotr Szymon Żuchowski, Timur V. Tscherbul

Published Oct 28, 2016• 0 citations
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We investigate the interactions between ultracold alkali-metal atoms and closed-shell atoms using electronic structure calculations on the prototype system Rb+Sr. There are molecular bound states that can be tuned across atomic thresholds with a magnetic field and previously neglected terms in the collision Hamiltonian that can produce zero-energy Feshbach resonances with significant widths. The largest effect comes from the interaction-induced variation of the Rb hyperfine coupling. The resonances may be used to form paramagnetic polar molecules if the magnetic field can be controlled precisely enough.