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arXiv 0705.2716hep-thcond-mat.str-el
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磁场中XXZ链有限温度关联函数的因式分解

Factorization of the finite temperature correlation functions of the XXZ chain in a magnetic field

Herman E. Boos, Frank Göhmann, Andreas Klümper, Junji Suzuki

摘要:

我们提出了一个猜想的密度矩阵的有限段的XXZ链耦合到一个热浴和一个恒定的纵向磁场。它指出,非齐次密度矩阵,设想为一个映射,其中每个本地运营商的热期望值,可以写为一个运营商的指数的迹构成的某些monodromy矩阵的元素的加权迹有关的$U_q (\hat{\mathfrak{sl}}_2)$和只有两个超越函数属于一点的功能和邻居,分别。我们的猜想意味着XXZ链的所有静态关联函数都是这两个函数及其导数的多项式,其系数为纯代数原点。

英文摘要:

We present a conjecture for the density matrix of a finite segment of the XXZ chain coupled to a heat bath and to a constant longitudinal magnetic field. It states that the inhomogeneous density matrix, conceived as a map which associates with every local operator its thermal expectation value, can be written as the trace of the exponential of an operator constructed from weighted traces of the elements of certain monodromy matrices related to $U_q (\hat{\mathfrak{sl}}_2)$ and only two transcendental functions pertaining to the one-point function and the neighbour correlators, respectively. Our conjecture implies that all static correlation functions of the XXZ chain are polynomials in these two functions and their derivatives with coefficients of purely algebraic origin.

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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