### 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 X X Z spin chain with diagonal boundary fields. We also compute the soliton boundary S matrix in the critical regime.

Original language | English (US) |
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Pages (from-to) | 3663-3680 |

Number of pages | 18 |

Journal | Journal of Physics A: Mathematical and General |

Volume | 32 |

Issue number | 20 |

DOIs | |

State | Published - May 21 1999 |

### ASJC Scopus subject areas

- Statistical and Nonlinear Physics
- Mathematical Physics
- Physics and Astronomy(all)

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## Cite this

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

*Journal of Physics A: Mathematical and General*,*32*(20), 3663-3680. https://doi.org/10.1088/0305-4470/32/20/301