Quantum integrable family of generalized Hubberd models with twisted Yangian symmetry

A strongly correlated electron system in the line of the recently proposed generalized Hubberd models as candidates for high Tc-superconductors is considered. The model along with a whole class of such systems are shown to be completely integrable with explicit quantum R-matrices and the Lax operators. Inspite of novelties in the Bethe ansatz solution, the results do not deviate much from that of the standard Hubberd model and confirms the Luttinger like behavior of spin-charge separation. However, the symmetry of the model is changed to a recently discovered twisted Yangian symmetry.