Development of algebraic techniques for the atomic open-shell MBPT(3)
Development of algebraic techniques for the atomic open-shell MBPT(3)
The atomic third-order open-shell many-body perturbation theory is developed. Special attention is paid to the generation and algebraic analysis of terms of the wave operator and the effective Hamiltonian as well. Making use of occupation-number representation and intermediate normalization, the third-order derivations are worked out by employing a computational software …