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arxiv: cond-mat/0412062 · v1 · submitted 2004-12-02 · ❄️ cond-mat.stat-mech · hep-th

Integral representation of the density matrix of the XXZ chain at finite temperatures

classification ❄️ cond-mat.stat-mech hep-th
keywords chaindensityfiniteformulaintegralmatrixfieldinfinitely
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We present an integral formula for the density matrix of a finite segment of the infinitely long spin-1/2 XXZ chain. This formula is valid for any temperature and any longitudinal magnetic field.

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