Faddeev Random Phase Approximation for molecules

The Faddeev Random Phase Approximation is a Green's function technique that makes use of Faddeev-equations to couple two-particle-one-hole and two-hole-one-particle excitations to the single-particle spectrum. Solving these equations implies an infinite partial summation of the perturbation expansion of the self energy. This method goes beyond the third-order Algebraic Diagrammatic Approximation by treating both the particle-hole and particle-particle interactions at the Random Phase Approximation-level. This paper presents the first results of our calculations for diatomic molecules. (C) 2010 Elsevier B.V. All rights reserved.