Integrable Models Associated to Classical Representations of U_q(\widehat{sl(n)})

Details Integrable Models Associated to Classical Representations of U_q(\widehat{sl(n)}) Integrable Models Associated to Classical Representations of U_q(\widehat{sl(n)})

1996-09-23

arxiv.org/abs/cond-mat/9609220v1

Physics

Condensed Matter

16 pages, Report DFTUZ 94-11

Scientific paper

We describe a representation for $U_q(\widehat{sl(n)})$, when $q$ is not a root of unity, based on the fundamental representation of $sl(n)$. As $U_q(sl(n))$ has a Hopf algebra structure with a non-commutative co-product, we look for a intertwine matrix $R$ that relates two possible definitions of that co-product. We solve cases for $n=2$ and $n=3$, and then we generalize for any $n$. We obtain the hamiltonian associated to such matrix $R$, corresponding to a multi-state chain. As the case for $n=2$ corresponds to the XXZ model with spin $1/2$, for $n>2$ we have the generalization of the XXZ model to $sl(n)$. We show the case for $n=3$ and its solution by Bethe ansatz.

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