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

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

2005-09-29

arxiv.org/abs/cond-mat/0509765v1

J.Stat.Mech.0510:P10015,2005

Physics

Condensed Matter

Statistical Mechanics

35 pages

Scientific paper

10.1088/1742-5468/2005/10/P10015

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.

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