On the symmetry of excitations in SU(2) Bethe Ansatz systems
arXiv:cond-mat/9812415
Abstract
Using the XXX Heisenberg chain as an example, based on the symmetry properties of the eigenstates with respect to reversing all the spins we argue, that the basic SU(2) symmetry of the model is inherited by the excitations with slight modifications only.
6 pages, latex