The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields

Details The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields

2008-07-11

arxiv.org/abs/0807.1907v1

Physics

Atomic Physics

8 pages, 6 figures

Scientific paper

10.1103/PhysRevA.78.033434

We investigate the energy levels of heteronuclear alkali metal dimers in levels correlating with the lowest rotational level of the ground electronic state, which are important in efforts to produce ground-state ultracold molecules. We use density-functional theory to calculate nuclear quadrupole and magnetic coupling constants for RbK and RbCs and explore the hyperfine structure in the presence of electric and magnetic fields. For nonrotating states, the zero-field splittings are dominated by the electron-mediated part of the nuclear spin-spin coupling. They are a few kHz for RbK isotopologs and a few tens of kHz for RbCs isotopologs.

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