### Abstract

We propose a Bethe-ansatz-type solution of the open spin-1/2 integrable XXZ quantum spin chain with general integrable boundary terms and bulk anisotropy values iπ/(p+1), where p is a positive integer. All six boundary parameters are arbitrary, and need not satisfy any constraint. The solution is in terms of generalized T-Q equations, having more than one Q function. We find numerical evidence that this solution gives the complete set of 2^{N} transfer matrix eigenvalues, where N is the number of spins.

Original language | English (US) |
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Article number | P08006 |

Journal | Journal of Statistical Mechanics: Theory and Experiment |

Issue number | 8 |

DOIs | |

State | Published - Aug 1 2006 |

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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