Calculation of accurate permanent dipole moments of the lowest $^{1,3} Σ^+$ states of heteronuclear alkali dimers using extended basis sets

Details Calculation of accurate permanent dipole moments of the lowest $^{1,3} Σ^+$ states of heteronuclear alkali dimers using extended basis sets Calculation of accurate permanent dipole moments of the lowest $^{1,3} Σ^+$ states of heteronuclear alkali dimers using extended basis sets

2005-02-10

arxiv.org/abs/quant-ph/0502059v2

Journal of Chemical Physics 122 (2005) 204302

Physics

Quantum Physics

accepted to J. Chem. Phys

Scientific paper

10.1063/1.1903944

The obtention of ultracold samples of dipolar molecules is a current challenge which requires an accurate knowledge of their electronic properties to guide the ongoing experiments. In this paper, we systematically investigate the ground state and the lowest triplet state of mixed alkali dimers (involving Li, Na, K, Rb, Cs) using a standard quantum chemistry approach based on pseudopotentials for atomic core representation, gaussian basis sets, and effective terms for core polarization effects. We emphasize on the convergence of the results for permanent dipole moments regarding the size of the gaussian basis set, and we discuss their predicted accuracy by comparing to other theoretical calculations or available experimental values. We also revisit the difficulty to compare computed potential curves among published papers, due to the differences in the modelization of core-core interaction.

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