paper

Nested Bethe ansatz for `all' open spin chains with diagonal boundary conditions

arXiv:0902.0321 · doi:10.1088/1751-8113/42/20/205203

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.

40 pages; examples of Bethe vectors added; Bethe equations for U_q(gl(2/2)) added; misprints corrected

References in corpus (4)

Cited by in corpus (23)