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Title:
Symmetries and degeneracies of quantum spin chains
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Abstract:
The spectrum of a quantum spin chain can have degeneracies, which can be understood from the model’s symmetries. We consider here the symmetries and degeneracies of anisotropic integrable open spin chains, which are associated to affine Lie algebras $\hat g$. These spin chains have quantum group symmetries corresponding to removing one node from the $\hat g$ Dynkin diagram. Based on recent work with A. Retore (arXiv 1802.04864) and R. Pimenta (arXiv 1805.10144).
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