One-Body Equation

This equation has at least two exact solutions. Thus, both the set of RDM s obtained in a Hartree-Fock HF) calculation and that obtained from a FCI one fulfill exactly this effective one-body equation. Unfortunately, the iterative method sketched above converged to the HF solution in all the cases tested. This may be due to the fact that in our algorithm, the correlation effects are estimated through a renormalization procedure, which may not be sufBciently accurate in the first order case. To improve this aspect is one of the motivations of our present line of work. 

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