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Physics Letters A

A method for solving the Kondo problem

V.M. Filyov, Paul B. Wiegmann

Published Mar 1, 1980• 60 citations
Publisher
DOI
10.1016/0375-9601(80)90494-6

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Three kinds of integrable Kondo problems in one-dimensional extended Hubbard models are studied by means of the boundary graded quantum inverse scattering method. The boundary K matrices depending on the local moments of the impurities are presented as a nontrivial realization of the graded reflection equation algebras acting in a ${(2s}_{\ensuremath{\alpha}}+1)$-dimensional impurity Hilbert space. Furthermore, these models are solved using the algebraic Bethe ansatz method, and the Bethe ansatz equations are obtained.