The VSCF modals are functions of a single coordinate and the density for a mode m is simply obtained as the norm square of the modal function, |ϕ m s m (q m )| 2 . The densities of the VSCF states vary over space and the eigenstates of higher energy have a wider distribution of the wave function as a function of the coordinate. In the ADGA algorithm, the default is to use an average density determined as an average over the N modals lowest-energy eigenstates