Dynamical correlation functions of the XXZ model at finite temperature

Details Dynamical correlation functions of the XXZ model at finite temperature Dynamical correlation functions of the XXZ model at finite temperature

2007-03-13

arxiv.org/abs/cond-mat/0703319v4

J.Phys.A40:7523-7542,2007

Physics

Condensed Matter

Statistical Mechanics

22 pages, v4: typos corrected, published version

Scientific paper

10.1088/1751-8113/40/27/007

Combining a lattice path integral formulation for thermodynamics with the solution of the quantum inverse scattering problem for local spin operators, we derive a multiple integral representation for the time-dependent longitudinal correlation function of the spin-1/2 Heisenberg XXZ chain at finite temperature and in an external magnetic field. Our formula reproduces the previous results in the following three limits: the static, the zero-temperature and the XY limits.

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