The finite temperature density matrix and two-point correlations in the antiferromagnetic XXZ chain
The finite temperature density matrix and two-point correlations in the antiferromagnetic XXZ chain
复制标题
反铁磁XXZ链中的有限温度密度矩阵和两点相关性
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Seel
中科院分区：
文献类型：
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作者：
F. Göhmann;Nils P. Hasenclever;A. Seel
我们导出了反铁磁XXZ链中两点相关函数积分公式的有限温度版本。推导是基于描述长度为m的有限链段的密度矩阵元素的求和。在这种情况下，我们还提供了密度矩阵基本积分公式的证明，该公式在先前的出版物中提出。
We derive finite temperature versions of integral formulae for the two-point correlation functions in the antiferromagnetic XXZ chain. The derivation is based on the summation of density matrix elements characterizing a finite chain segment of length m. On this occasion we also supply a proof of the basic integral formula for the density matrix presented in an earlier publication.