Boundary Critical Phenomena in SU(3) "Spin" Chains
Condensed Matter
2008-11-26 v1 High Energy Physics - Theory
Abstract
SU(3)-invariant "spin" chains with a single impurity, such as a modified exchange coupling on one link, are analyzed using boundary conformal field theory techniques. These chains are equivalent to a special case of the "tJV" model, i.e. the t-J model with a nearest neighbour repulsion added. In the continuum limit they are equivalent to two free bosons at a special value of the compactification radii. The SU(3) symmetry, which is made explicit in this formulation, provides insight into the exact solution of a non-trivial boundary critical point found earlier in another formulation of this model as a theory of quantum Brownian motion.
Cite
@article{arxiv.cond-mat/0011454,
title = {Boundary Critical Phenomena in SU(3) "Spin" Chains},
author = {Ian Affleck and Masaki Oshikawa and Hubert Saleur},
journal= {arXiv preprint arXiv:cond-mat/0011454},
year = {2008}
}
Comments
19 pages, Rev Tex