The Temperley-Lieb algebra and its generalizations in the Potts and XXZ models

Abstract

We discuss generalizations of the Temperley-Lieb algebra in the Potts and XXZ models. These can be used to describe the addition of different types of integrable boundary terms. We use the Temperley-Lieb algebra and its one-boundary, two-boundary, and periodic extensions to classify different integrable boundary terms in the 2, 3, and 4-state Potts models. The representations always lie at critical points where the algebras becomes non-semisimple and possess indecomposable representations. In the one-boundary case we show how to use representation theory to extract the Potts spectrum from an XXZ model with particular boundary terms and hence obtain the finite size scaling of the Potts models. In the two-boundary case we find that the Potts spectrum can be obtained by combining several XXZ models with different boundary terms. As in the Temperley-Lieb case there is a direct correspondence between representations of the lattice algebra and those in the continuum conformal field theory.

49 pages

References in corpus (3)

• Magic in the spectra of the XXZ quantum chain with boundaries at Delta=0 and Delta=-1/2
• One-boundary Temperley-Lieb algebras in the XXZ and loop models
• Loops, matchings and alternating-sign matrices

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