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Extended integrability regime for the supersymmetric U model

Jon Links

cond-mat.str-elarXiv:cond-mat/9903274

Abstract

An extension of the supersymmetric U model for correlated elctrons is given and integrability is established by demonstrating that the model can be constructed through the Quantum Inverse Scattering Method using an R-matrix without the difference property. Some general symmetry properties of the model are discussed and from the Bethe ansatz solution an expression for the energies is presented.

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