### Abstract

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.

Original language | English |
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Journal | Journal of Physics A: Mathematical and General |

Volume | 32 |

Issue number | 20 |

DOIs | |

Publication status | Published - 21 May 1999 |

### Keywords

- hep-th
- nlin.SI
- solv-int

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## Cite this

Doikou, A., & I. Nepomechie, R. (1999). Direct calculation of breather S matrices.

*Journal of Physics A: Mathematical and General*,*32*(20). https://doi.org/10.1088/0305-4470/32/20/301