Abstract
We perform the atomic-structure calculations by means of the optimized effective potential (OEP) method. The expression for the correlation energy is developed on the basis of the density functional perturbation theory. The third- and higher-order perturbation terms are renormalized into the constant factor multiplied by the Møller–Plesset second-order (MP2) perturbation energy. Exchange and correlation energies for He and Ne atoms are much improved as compared with those of the conventional local density approximation and those of the OEP-MP2 calculations.
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