Radial Kohn-Sham problem via integral-equation approach
Atomic and Molecular Clusters
2022-07-13 v2
Abstract
We present a numerical tool for solving the non-relativistic Kohn-Sham problem for spherically-symmetric atoms. It treats the Schr\"{o}dinger equation as an integral equation relying heavily on convolutions. The solver supports different types of exchange-correlation functionals including screened and long-range corrected hybrids. We implement a new method for treating range separation based on the complementary error function kernel. The present tool is applied in non-relativistic total energy calculations of atoms. A comparison with ultra-precise reference data[Cinal, JOMC 58, 1571 (2020)] shows a 14-digit agreement for Hartree-Fock results. We provide further benchmark data obtained with 5 different exchange-correlation functionals.
Cite
@article{arxiv.2202.00647,
title = {Radial Kohn-Sham problem via integral-equation approach},
author = {Jānis Užulis and Andris Gulans},
journal= {arXiv preprint arXiv:2202.00647},
year = {2022}
}