Bethe-AnsatzSolution of the Anderson Model of a Magnetic Impurity with Orbital Degeneracy

A model for Ce impurities is considered, consisting of the $4f^0$ singlet and a multiplet of total angular momentum $j$ of the $4f^1$ configuration hybridized with conduction states of the metal ($U\to \infty$ limit of Anderson's model). The model is solved by a Bethe Ansatz and exact expressions for ground-state properties, e.g., valence, spin and charge susceptibilities, and resistivity, are given.