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arXiv · 1507.04565

Reduction of Electronic Wavefunctions to Kohn-Sham Effective Potentials

Ilya G. Ryabinkin·Sviataslau V. Kohut·Viktor N. Staroverov
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Abstract

A method for calculating the Kohn--Sham exchange-correlation potential, $v_\text{XC}(\mathbf{r})$, from a given electronic wavefunction is devised and implemented. It requires on input one- and two-electron density matrices and involves construction of the generalized Fock matrix. The method is free from numerical limitations and basis-set artifacts of conventional schemes for constructing $v_\text{XC}(\mathbf{r})$ in which the potential is recovered from a given electron density, and is simpler than various many-body techniques. The chief significance of this development is that it allows one to directly probe the functional derivative of the true exchange-correlation energy functional and to rigorously test and improve various density-functional approximations.

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Ilya G. Ryabinkin, Sviataslau V. Kohut, Viktor N. Staroverov. 2015-07-16. Reduction of Electronic Wavefunctions to Kohn-Sham Effective Potentials. https://doi.org/10.1103/physrevlett.115.083001

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