Exact results for the sigma^z two-point function of the XXZ chain at Delta=1/2

Details Exact results for the sigma^z two-point function of the XXZ chain at Delta=1/2 Exact results for the sigma^z two-point function of the XXZ chain at Delta=1/2

2005-06-14

arxiv.org/abs/hep-th/0506114v1

J.Stat.Mech.0509:L09002,2005

Physics

High Energy Physics

High Energy Physics - Theory

8 pages

Scientific paper

10.1088/1742-5468/2005/09/L09002

We propose a new multiple integral representation for the correlation function of the XXZ spin-1/2 Heisenberg chain in the disordered regime. We show that for Delta=1/2 the integrals can be separated and computed exactly. As an example we give the explicit results up to the lattice distance m=8. It turns out that the answer is given as integer numbers divided by 2^[(m+1)^2].

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