Ground state correlations and Hartree-Fock using exp(S) method

The authors use the exp(S) coupled cluster expansion together with the Argonne-V8 potential to generate the HF single particle wave functions and the correlation operator S in a large configuration space (>30{Dirac_h}{omega}). This gives a complete description of the correlated ground state which can be used to calculate observables such as densities and excited states. The authors discuss the approximations and truncations made. They show the one- and the two-body density for {sup 16}O.