Graded reflection equation algebras and integrable Kondo impurities in the one-dimensional t-J model Original Research Article

Integrable Kondo impurities in two cases of the one-dimensional t-J model are studied by means of the boundary Z2-graded quantum inverse scattering method. The boundary K-matrices depending on the local magnetic moments of the impurities are presented as non-trivial realizations of the reflection equation algebras in an impurity Hilbert space. Furthermore, these models are solved by using the algebraic Bethe ansatz method and the Bethe ansatz equations are obtained.