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Cluster perturbation theory. I. Theoretical foundation for a coupled cluster target state and ground-state energies 

Pawlowski, Filip; Olsen, Jeppe; Jorgensen, Poul; 0000-0002-5928-2140 (2020-05-20)
We introduce a new class of perturbation models-the cluster perturbation (CP) models-where the major drawbacks of Moller-Plesset perturbation theory and coupled cluster perturbation theory have been eliminated. In CP theory, ...