Nested Bethe ansatz for `all' open spin chains with diagonal boundary conditions
Abstract
We present in an unified and detailed way the nested Bethe ansatz for open spin chains based on Y(gl(\fn)), Y(gl(\fm|\fn)), U_{q}(gl(\fn)) or U_{q}(gl(\fm|\fn)) (super)algebras, with arbitrary representations (i.e. `spins') on each site of the chain and diagonal boundary matrices (K^+(u),K^-(u)). The nested Bethe anstaz applies for a general K^-(u), but a particular form of the K^+(u) matrix. The construction extends and unifies the results already obtained for open spin chains based on fundamental representation and for some particular super-spin chains. We give the eigenvalues, Bethe equations and the form of the Bethe vectors for the corresponding models. The Bethe vectors are expressed using a trace formula.
Keywords
Cite
@article{arxiv.0902.0321,
title = {Nested Bethe ansatz for `all' open spin chains with diagonal boundary conditions},
author = {S. Belliard and E. Ragoucy},
journal= {arXiv preprint arXiv:0902.0321},
year = {2015}
}
Comments
40 pages; examples of Bethe vectors added; Bethe equations for U_q(gl(2/2)) added; misprints corrected