%0 Journal Article
%T Double-Pole Approximation in Time-Dependent Density Functional Theory
%A H. Appel
%A E. K. U. Gross
%A K. Burke
%J Physics
%D 2005
%I arXiv
%R 10.1002/qua.20964
%X A simple approximate solution to the linear response equations of time-dependent density functional theory (TDDFT) is given. This extends the single-pole approximation (SPA) to two strongly-coupled poles. The analysis provides both an illustration of how TDDFT works when strong exchange-correlation effects are present and insight into such corrections. For example, interaction can cause a transition to vanish entirely from the optical spectrum.
%U http://arxiv.org/abs/cond-mat/0510396v1