An information-entropic study of correlated densities of the water molecule

The Shannon entropy of the water molecule was calculated at different correlation levels including full configuration interaction (CI) for the D95 basis set. The results show that an analysis of both the position and momentum space entropy yields insights into the characteristics of different correlated methods from the density perspective and provides an alternative way of interpreting the wave function. Various changes in the electronic densities intrinsic to these correlation methods are also related to concepts within the information entropy framework.