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25 April 2024

» arxiv » 0708.4342

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Form-factors in the Baxter-Bazhanov-Stroganov model I: Norms and matrix element
G. von Gehlen ; N. Iorgov ; S. Pakuliak ; V. Shadura ; Yu. Tykhyy ;
Date:	2 Sep 2007
Abstract:	We continue our investigation of the Z_N-Baxter-Bazhanov-Stroganov model using the method of separation of variables [nlin/0603028]. In this paper we calculate the norms and matrix elements of a local Z_N-spin operator between eigenvectors of the auxiliary problem. For the norm the multiple sums over the intermediate states are performed explicitly. In the case N=2 we solve the Baxter equation and obtain form-factors of the spin operator of the periodic Ising model on a finite lattice.
Source:	arXiv, 0708.4342
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