On the interaction of NH($X^{3}Σ^{-}$) molecules with rubidium atoms: implications for sympathetic cooling and the formation of extremely polar molecules

Details On the interaction of NH($X^{3}Σ^{-}$) molecules with rubidium atoms: implications for sympathetic cooling and the formation of extremely polar molecules On the interaction of NH($X^{3}Σ^{-}$) molecules with rubidium atoms: implications for sympathetic cooling and the formation of extremely polar molecules

2003-07-18

arxiv.org/abs/cond-mat/0307466v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures, minor reference error corrected

Scientific paper

10.1103/PhysRevLett.92.163202

The Rb-NH interaction is investigated as a prototype for interactions between alkali metal atoms and stable molecules. For spin-aligned Rb and NH that interact on a quartet surface ($^4A''$), the interaction is relatively weak, with a well depth of 0.078 eV. However, there are also doublet surfaces of ion-pair character that are very much deeper (well depth 1.372 eV) and may be important for atom - molecule collision rates. Similar deeply bound ion-pair states are likely to exist for other alkali atom -- molecule pairs. It is shown that a transition to a dipolar superfluid phase will be easier to achieve for low-mass than for high-mass species.

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