How to Improve Functionals in Density Functional Theory? —Formalism and Benchmark Calculation—
We proposed in Ref. [J. Phys. B 39, 13120 (2019)] a way to improve energy density functionals in the density functional theory based on the combination of the inverse Kohn-Sham method and the density functional perturbation theory. In this proceeding, we mainly focus on the results for the Ar and Kr atoms.