The Role of the Central Element in the Quantum Algebra Underlying the Twisted XXZ Chain
M. R-Monteiro, I. Roditi, L. M. C. S. Rodrigues, S. Sciuto
Abstract
We study the relationship among the XXZ Heisenberg model and three models obtained from it by various transformations. In particular, we emphasize the role of a non trivial central element tZ in the underlying algebra and its relationship with the twisted boundary conditions, SN+1=t NS1.
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