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

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

2004-12-02

arxiv.org/abs/cond-mat/0412062v1

J.Phys. A38 (2005) 1833-1842

Physics

Condensed Matter

Statistical Mechanics

12 pages, Latex

Scientific paper

10.1088/0305-4470/38/9/001

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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