Integrable Impurity Model with Spin and Flavour: Model Inspired by   Resonant Tunneling in Quantum Dot
  We introduce an integrable impurity model in which both electrons and impurity have spin and flavour degrees of freedom. This model is a generalization of the multi-channel Kondo model and closely related with resonant tunneling through quantum dot. The Hamiltonian is exactly diagonalized by means of the Bethe ansatz. 
Osamu Tsuchiya, Ikuo Ichinose, Yasuyuki Kayama (U. of Tokyo Komaba)