Ultracold RbSr molecules can be formed by magnetoassociation |
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Authors: | Zuchowski Piotr S Aldegunde J Hutson Jeremy M |
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Institution: | Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK. |
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Abstract: | 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. |
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