Long range interactions between alkali and alkaline-earth atoms

TL;DR

This paper calculates dispersion coefficients for alkali and alkaline-earth atoms, considering ground and excited states, using advanced quantum chemistry methods to improve understanding of long-range atomic interactions.

Contribution

It provides new dispersion coefficients for alkali and alkaline-earth atoms, including excited state interactions, computed via frozen core configuration interaction methods.

Findings

Dispersion coefficients for Li-Rb and Be-Sr atoms in ground states.

Additional coefficients for mixed ground and excited states.

Enhanced data for modeling long-range atomic interactions.

Abstract

Dispersion coefficients between the alkali metal atoms (Li-Rb) and alkaline-earth metal atoms (Be-Sr) are evaluated using matrix elements computed from frozen core configuration interaction calculations. Besides dispersion coefficients with both atoms in their respective ground states, dispersion coefficients are also given for the case where one atom is in its ground state and the other atom is in a low lying excited state.