Diagrammatic perturbation theory: An application to the LiH and FH molecules using a universal even-tempered basis set

Abstract

Diagrammatic many-body perturbation theory is applied to the ground states of the LiH and FH molecules at their respective equilibrium nuclear geometries. The same universal even-tempered basis set of Slater exponential functions is employed in each calculation. 94.0% and 82.3% of the correlation energy is recovered in LiH and FH, respectively.