We calculate the phase diagram of an integrable anisotropic 3-leg quantum spin tube connected to the su(8) algebra. We find several quantum phase transitions for antiferromagnetic rung couplings. Their locations are calculated exactly from the Bethe Ansatz solution and we discuss the nature of each of the different phases.
@article{arxiv.cond-mat/9911074,
title = {Phase diagram of the su(8) quantum spin tube},
author = {J. de Gier and M. T. Batchelor and M. Maslen},
journal= {arXiv preprint arXiv:cond-mat/9911074},
year = {2009}
}