Integrable generalised spin ladder models
arXiv:cond-mat/0005453
Abstract
We present two new integrable spin ladder models which posses three general free parameters besides the rung coupling J. Wang's systems based on the SU(4) and SU(3/1) symmetries can be obtained as special cases. The models are exactly solvable by means of the Bethe ansatz method.
6 pages, LaTex