Fusion Operators in the Generalized $τ^{(2)}$-model and Root-of-unity Symmetry of the XXZ Spin Chain of Higher Spin

Details Fusion Operators in the Generalized $τ^{(2)}$-model and Root-of-unity Symmetry of the XXZ Spin Chain of Higher Spin Fusion Operators in the Generalized $τ^{(2)}$-model and Root-of-unity Symmetry of the XXZ Spin Chain of Higher Spin

2006-07-11

arxiv.org/abs/cond-mat/0607258v3

J.Phys.A40:1481-1512,2007

Physics

Condensed Matter

Statistical Mechanics

Latex 33 Pages; Typos and errors corrected, New improved version by adding explanations for better presentation. Terminology i

Scientific paper

10.1088/1751-8113/40/7/005

We construct the fusion operators in the generalized $\tau^{(2)}$-model using the fused $L$-operators, and verify the fusion relations with the truncation identity. The algebraic Bethe ansatz discussion is conducted on two special classes of $\tau^{(2)}$ which include the superintegrable chiral Potts model. We then perform the parallel discussion on the XXZ spin chain at roots of unity, and demonstrate that the $sl_2$-loop-algebra symmetry exists for the root-of-unity XXZ spin chain with a higher spin, where the evaluation parameters for the symmetry algebra are identified by the explicit Fabricius-McCoy current for the Bethe states. Parallels are also drawn to the comparison with the superintegrable chiral Potts model.

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