期刊
NUCLEAR PHYSICS B
卷 892, 期 -, 页码 1-20出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysb.2015.01.003
关键词
-
资金
- Sao Paulo Research Foundation (FAPESP) [2014/09832-1]
The modified algebraic Bethe ansatz, introduced by Cramp6 and the author [8], is used to characterize the spectral problem of the Heisenberg XXZ spin-1/2 chain on the segment with lower and upper triangular boundaries. The eigenvalues and the eigenvectors are conjectured. They are characterized by a set of Bethe roots with cardinality equal to N the length of the chain and which satisfies a set of Bethe equations with an additional term. The conjecture follows from exact results for small chains. We also present a factorized formula for the Bethe vectors of the Heisenberg XXZ spin-1/2 chain on the segment with two upper triangular boundaries. (C) 2015 The Author. Published by Elsevier B.V.
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