Coulomb blockade in Anderson junction without time-dependent density functional theory

Above the Kondo temperature, the Kohn-Sham zero-bias conductance of an Anderson junction completely misses the Coulomb blockade. Within a simple model for the spectral function, we deduce a parameterization for both the onsite exchange-correlation potential and the bias drop as a function of the site occupation. We show our parametrization is accurate for all correlation strengths. We argue that this drop is due to nonlocal effects in static DFT, rather than due to dynamical time-dependent DFT effects.