Perturbation Theory on Top of Optimized Effective Potential Method

P. Sule

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Perturbation Theory on Top of Optimized Effective Potential Method

P. Sule

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Abstract

We present a perturbative approach within the scope of Kohn-Sham density functional theory (DFT). The method is based on the exact exchange-only optimized effective potential method, and correlation is included via perturbation expansion using Rayleigh-Schrodinger (RS) perturbation theory (PT). The correlation potential is constructed from Moller-Plesset formulation of RS calculations. This naturally leads to a new iterative scheme when finite order perturbation theory is employed. The new iterative procedure can be taken as a self-consistent parameter-free DFT PT, and, as such, provides correlation energy which is explicitly functional of the self-consistent orbitals, eigenvalues and also of the exchange-correlation potential.

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P. Sule. 1999-07-20. Perturbation Theory on Top of Optimized Effective Potential Method. https://arxiv.org/abs/physics/9907031

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