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arxiv: hep-th/9903066 · v1 · submitted 1999-03-08 · ✦ hep-th · nlin.SI· solv-int

Direct Calculation of Breather S Matrices

classification ✦ hep-th nlin.SIsolv-int
keywords boundarybreatherapproachmatricesmatrixspinbethe-ansatzbound-state
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We formulate a systematic Bethe-Ansatz approach for computing bound-state (``breather'') S matrices for integrable quantum spin chains. We use this approach to calculate the breather boundary S matrix for the open XXZ spin chain with diagonal boundary fields. We also compute the soliton boundary S matrix in the critical regime.

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