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Boundary Critical Phenomena in SU(3) "Spin" Chains

Ian Affleck·Masaki Oshikawa·Hubert Saleur
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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.

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Ian Affleck, Masaki Oshikawa, Hubert Saleur. 2000-11-27. Boundary Critical Phenomena in SU(3) "Spin" Chains. https://doi.org/10.1088/0305-4470%2F34%2F6%2F301

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