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On Integrable Quantum Group Invariant Antiferromagnets

R. Cuerno, G. Sierra, C. Gomez

hep-tharXiv:hep-th/9205109

Abstract

A new open spin chain hamiltonian is introduced. It is both integrable (Sklyanin`s type K matrices are used to achieve this) and invariant under Uε(sl(2)) transformations in nilpotent irreps for ε3=1. Some considerations on the centralizer of nilpotent representations and its representation theory are also presented.

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