Correlation functions of integrable $O(n)$ spin chains

G. A. P. Ribeiro

Published 2020-05-19Version 1

We study the correlation functions of the integrable $O(n)$ spin chain in the thermodynamic limit. We derived functional equations of the quantum Knizhnik Zamolodchikov type for the density matrix. We give the explicit solution for two-site correlations for the $O(n)$ for the $n=3,4,\dots,8$ cases at zero temperature.