### Abstract

We propose a generalization of the Baxter T-Q relation which involves more than one independent Q(u). We argue that the eigenvalues of the transfer matrix of the open XXZ quantum spin chain are given by such generalized T-Q relations, for the case that at most two of the boundary parameters {α_{-}, α_{+}, β_{-}, β_{+}} are nonzero, and the bulk anisotropy parameter has values η ≤ iπ/2, iπ/4, ....

Original language | English (US) |
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Pages (from-to) | 41-53 |

Number of pages | 13 |

Journal | Journal of Statistical Mechanics: Theory and Experiment |

Issue number | 8 |

DOIs | |

State | Published - Aug 1 2005 |

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### Keywords

- Integrable spin chains (vertex models)
- Quantum integrability (Bethe ansatz)

### ASJC Scopus subject areas

- Statistical and Nonlinear Physics
- Statistics and Probability
- Statistics, Probability and Uncertainty