Finite temperature density matrix and two-point correlations in the antiferromagnetic XXZ chain

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...

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Bibliographic Details
Published inarXiv.org
Main Authors Göhmann, Frank, Hasenclever, Nils P, Seel, Alexander
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 29.09.2005
Subjects
Antiferromagnetism
Chains
Density
Integrals
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0509765