Figure presents HHG spectra for H 2 computed using TDKS simulations with both the LRC-ωPBE functional as well as TDHF theory. In this first set of numerical control experiments, no CAP is applied and the laser field is the same impulse field that was used for the stability tests, with a total time propagation of 1,500 a.u.. Neither spectrum in Fig. conveys much of the known characteristics of a high-harmonic spectrum, in concurrence with previous TD-CIS simulations when no correction for the unbound states is applied. Only the first three harmonics are well resolved in the DFT spectrum and only the first two harmonics in the HF spectrum.