Wave-function entropy and dynamical-symmetry breaking in the interacting boson model

Details Wave-function entropy and dynamical-symmetry breaking in the interacting boson model Wave-function entropy and dynamical-symmetry breaking in the interacting boson model

1998-02-25

arxiv.org/abs/chao-dyn/9802024v1

Nonlinear Sciences

Chaotic Dynamics

32 pages (RevTeX), 11 figures (PS)

Scientific paper

10.1103/PhysRevE.58.387

The degree of chaos in the Interacting Boson Model (IBM-1) is compared with what we call the "dynamical-symmetry content" of the system. The latter is represented by the information entropy of the eigenfunctions with respect to bases associated with dynamical symmetries of the IBM-1, and expresses thus the localization of actual eigenfunctions in these symmetry bases. The wave-function entropy is shown to be a sensitive tool for monitoring the processes of a single dynamical-symmetry breaking or transitions between two and more symmetries. For the IBM-1 hamiltonians studied here, the known features related to chaos, namely the dependence of chaotic measures on the hamiltonian parameters (position in the Casten triangle) and on the angular momentum, turn out to be correlated with the behaviour of the wave-function entropy. PACs 21.60.Fw; 05.45.+b

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