SEARCH Articles Figures Tables CCSD CCSD coupled-cluster singles, doubles CCSD coupled-cluster singles, doubles approximations CCSD coupled-cluster singles, doubles calculations CCSD coupled-cluster singles, doubles triples, quadruples Calculated using coupled-cluster CCSD Cluster coupled Correlation consistent basis sets CCSD (coupled cluster singles Coupled cluster single double triple CCSD Coupled cluster single-double excitations CCSD) Coupled cluster singles and doubles (CCSD Coupled cluster singles and doubles CCSD) method Coupled cluster theory CCSD method Coupled-cluster CCSD and Coupled-cluster CCSD methods Equation of motion coupled cluster EOM-CCSD Potential energy surface coupled-cluster [CCSD