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arXiv 2104.06269cond-mat.stat-mechhep-thmath-phmath.MP
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可积人脸模型中的密度矩阵

Density matrices in integrable face models

Holger Frahm, Daniel Westerfeld

摘要:

利用可积相互作用圆形面(IRF或面)模型的局部玻尔兹曼权的性质,我们用广义传递矩阵表示局部算子。这允许在这些模型的非均匀概括中推导用于减少的密度矩阵的离散函数方程。我们应用这些方程来研究各种固对固类型的IRF模型和非阿贝尔$\bm{su(2)_3}$或Fibonacci任意子的量子链的密度矩阵。与六顶点模型类似,我们发现连续点序列的约化密度矩阵可以被“因式分解”,即用系数与模型参数无关的最近邻算子表示。显式表达式提供了多达三个相邻网站的关联函数。

英文摘要:

Using the properties of the local Boltzmann weights of integrable interaction-round-a-face (IRF or face) models we express local operators in terms of generalized transfer matrices. This allows for the derivation of discrete functional equations for the reduced density matrices in inhomogeneous generalizations of these models. We apply these equations to study the density matrices for IRF models of various solid-on-solid type and quantum chains of non-Abelian $\bm{su(2)_3}$ or Fibonacci anyons. Similar as in the six vertex model we find that reduced density matrices for a sequence of consecutive sites can be 'factorized', i.e.\ expressed in terms of nearest-neighbour correlators with coefficients which are independent of the model parameters. Explicit expressions are provided for correlation functions on up to three neighbouring sites.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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