A scalar two-level boson model to study the IBM phase diagram in the Casten triangle
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We introduce a simple two-level boson model with the same energy surface as the Q-consistent Interacting Boson Model Hamiltonian. The model can be diagonalized for large number of bosons and the results used to check analytical finite-size corrections to the energy gap and the order parameter in the critical region. \
6 pages, 6 figures, published version
6 pages, 6 figures, published version