SEARCH Articles Figures Tables Cluster coupled Clustering space Coupled Fock space Coupled-cluster theory Fock-space Couplings spacing Fock space Fock space multireference coupled-cluster Fock space multireference coupled-cluster method Fock-Space Coupled Cluster Approach Fock-space coupled cluster method Fock-space coupled cluster method equations Fock-space coupled cluster method ionization potentials Fock-space multireference coupled cluster theory