DYNAMICAL-SYMMETRY CONTENT OF TRANSITIONAL IBM-1 HAMILTONIANS

The localization of the IBM-1 eigenstates in bases corresponding to va rious dynamical symmetries of the model is quantified by the informati on entropy of the wave functions. Apart from the three standard limits , also two additional symmetries, following from phase ambiguities of the SU(3) and SO(6) generators, are considered. It is shown that the d egree of the eigenfunction localization in the symmetry bases is corre lated with the previously-found chaotic measures inside the Casten tri angle. (C) 1998 Elsevier Science B.V.