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• W2013574350 abstract "Alkaline-earth-metal atoms in their lowest $(mathrm{nsnp})$ ${}^{3}{P}_{2}$ state are exceptionally long lived and can be trapped magnetically. The nonspherical atomic structure leads to anisotropic long-range interactions between two metastable alkaline-earth-metal atoms. The anisotropy affects the rotational motion of the diatomic system and couples states of different rotational quantum numbers. This paper develops a tensorial decomposition of the most important long-range interaction operators, and a systematic inclusion of molecular rotations, in the presence of an external magnetic field. This analysis illuminates the nature of the coupling between the various degrees of freedom. The consequences are illustrated by application to a system of practical interest: metastable ${}^{88}mathrm{Sr}.$ Using atomic parameters determined in a nearly ab initio calculation, we compute adiabatic potential-energy curves. The anisotropic interatomic interaction, in combination with the applied magnetic field, is demonstrated to induce the formation of a long-range molecular potential well. This curve correlates to two fully polarized, low-field seeking atoms in a rotational s-wave state. The coupling among molecular rotational states controls the existence of the potential well, and its properties vary as a function of magnetic-field strength, thus allowing the scattering length in this state to be tuned. The scattering length of metastable ${}^{88}mathrm{Sr}$ displays a resonance at a field of 339 G." @default.
• W2013574350 created "2016-06-24" @default.
• W2013574350 creator A5024085206 @default.
• W2013574350 creator A5060707857 @default.
• W2013574350 date "2003-06-25" @default.
• W2013574350 modified "2023-10-16" @default.
• W2013574350 title "Tensorial analysis of the long-range interaction between metastable alkaline-earth-metal atoms" @default.
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• W2013574350 doi "https://doi.org/10.1103/physreva.67.062713" @default.
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