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arXiv 2005.09268math-phcond-mat.stat-mechmath.MPnlin.SI
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可积$O(n)$自旋链的关联函数

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

G. A. P. Ribeiro

摘要:

研究了可积$O(n)$自旋链在热力学极限下的关联函数。讨论了与$O(n)$自旋链有关的密度矩阵的量子Knizhnik Zamolodchikov型泛函方程的求解问题。我们给出了明确的解决方案,两个网站的密度矩阵元的$O(n)$,然后评估$n=3,4,\dots,8$的情况下,在零温度。

英文摘要:

We study the correlation functions of the integrable $O(n)$ spin chain in the thermodynamic limit. We addressed the problem of solving functional equations of the quantum Knizhnik Zamolodchikov type for density matrix related to the $O(n)$ spin chain. We give the explicit solution for two-sites density matrix elements for the $O(n)$ which are then evaluated for the $n=3,4,\dots,8$ cases at zero temperature.

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