Cold magnetically trapped 2Dg scandium atoms. I. Interaction potential

Tijs Karman, Xi Chu, Gerrit C. Groenenboom

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We present a first principles description of the interaction of two ground-state scandium atoms. Scandium has a 2Dg ground state. Thirty molecular states correlate to the lowest dissociation limit of the dimer. In the short range, potential energy curves are calculated using second-order n-electron valence state perturbation theory. The first-order long-range interaction is calculated at the complete active space self-consistent field level. We determine the second-order long-range dispersion interaction from atomic dynamic polarizabilities at imaginary frequencies. These polarizabilities are calculated using time-dependent density functional theory. We merge the short-range approach with the long-range model to obtain a physical description of the 30 potential energy curves correlating to the 2Dg+2Dg limit. Diabatic potentials are presented that can be used in quantum scattering calculations, in order to study Zeeman relaxation of ultracold scandium atoms.

Original languageEnglish
Article number052701
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
StatePublished - Nov 5 2014


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