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A fusion for the periodic Temperley–Lieb algebra and its continuum limit

Abstract : The equivalent of fusion in boundary conformal field theory (CFT) can be realized quite simply in the context of lattice models by essentially glueing two open spin chains. This has led to many developments, in particular in the context of chiral logarithmic CFT. We consider in this paper a possible generalization of the idea to the case of bulk conformal field theory. This is of course considerably more difficult, since there is no obvious way of merging two closed spin chains into a big one. In an earlier paper, two of us had proposed a " topological " way of performing this operation in the case of models based on the affine Temperley-Lieb (ATL) algebra, by exploiting the associated braid group representation and skein relations. In the present work, we establish—using, in particular, Frobenius reciprocity—the resulting fusion rules for standard modules of ATL in the generic as well as partially degenerate cases. These fusion rules have a simple interpretation in the continuum limit, where they correspond to the glueing of the right moving component of one conformal field with the left moving component of the other.
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Submitted on : Wednesday, March 21, 2018 - 11:26:22 AM
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Azat Gainutdinov, Jesper Jacobsen, Hubert Saleur. A fusion for the periodic Temperley–Lieb algebra and its continuum limit. Journal of High Energy Physics, Springer Verlag (Germany), 2018, pp.117. ⟨10.1007/JHEP11(2018)117⟩. ⟨cea-01739633⟩

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