The Supersymmetric t-J Model with a Boundary
نویسنده
چکیده
An open supersymmetric t-J chain with boundary fields is studied by means of the Bethe Ansatz. Ground state properties for the case of an almost half-filled band and a bulk magnetic field are determined. Boundary susceptibilities are calculated as functions of the boundary fields. The effects of the boundary on excitations are investigated by constructing the exact boundary S-matrix. From the analytic structure of the boundary S-matrices one deduces that boundary bound states are formed for sufficiently strong boundary fields. PACS numbers: 71.27.+a 75.10.Jm ∗e-mail: [email protected]
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