Reflection K-Matrices for 19-Vertex Models

Details Reflection K-Matrices for 19-Vertex Models Reflection K-Matrices for 19-Vertex Models

1999-06-08

arxiv.org/abs/solv-int/9906003v1

Nucl. Phys. B 558 [PM] 637-667

Physics

Condensed Matter

Statistical Mechanics

35 pages, LaTex

Scientific paper

10.1016/S0550-3213(99)00456-3

We derive and classify all regular solutions of the boundary Yang-Baxter equation for 19-vertex models known as Zamolodchikov-Fateev or $A_{1}^{(1)}$ model, Izergin-Korepin or $A_{2}^{(2)}$ model, sl(2|1) model and osp(2|1) model. We find that there is a general solution for $A_{1}^{(1)}$ and sl(2|1) models. In both models it is a complete K-matrix with three free parameters. For the $A_{2}^{(2)}$ and osp(2|1) models we find three general solutions, being two complete reflection K-matrices solutions and one incomplete reflection K-matrix solution with some null entries. In both models these solutions have two free parameters. Integrable spin-1 Hamiltonians with general boundary interactions are also presented. Several reduced solutions from these general solutions are presented in the appendices.

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