(Sorry for my bad English.) I learned something about Schrodinger's equation and 2 and 3 dimensions, as well particle confined in a box and the behavior of the atoms using Schrodinger's analysis. But I don't understand why a superposition of states is necessary* in the Schrodinger's cat experiment. Also, I would like to know how the wave functions must be added for the cat. Would we add the wave functions for each atom that makes the cat one-by-one? *Would it be necessary in order to the wave functions become more localized?