
<br/><br> <b>[WARNING: This is a *very* experimental feature]</b> The population of the excited states
 (as defined by <Phi_I|Phi(t)> where |Phi(t)> is the many-body time-dependent state at
 time <i>t</i>, and |Phi_I> is the excited state of interest) can be approximated -- it is not clear
 how well -- by substituting for those real many-body states the time-dependent Kohn-Sham
 determinant and some modification of the Kohn-Sham ground-state determinant (<i>e.g.</i>,
 a simple HOMO-LUMO substitution, or th