Sum rules for the ground states of the O(1) loop model on a cylinder and the XXZ spin chain
P. Di Francesco, P. Zinn-Justin, J. -B. Zuber
Abstract
The sums of components of the ground states of the O(1) loop model on a cylinder or of the XXZ quantum spin chain at Delta=-1/2 (of size L) are expressed in terms of combinatorial numbers. The methods include the introduction of spectral parameters and the use of integrability, a mapping from size L to L+1, and knot-theoretic skein relations.
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