Computation of dynamical correlation functions of Heisenberg chains in a field

Details Computation of dynamical correlation functions of Heisenberg chains in a field Computation of dynamical correlation functions of Heisenberg chains in a field

2005-02-15

arxiv.org/abs/cond-mat/0502365v1

Phys.Rev.Lett. 95 (2005) 077201

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 14 figures

Scientific paper

10.1103/PhysRevLett.95.077201

We compute the momentum- and frequency-dependent longitudinal spin structure
factor for the one-dimensional spin-1/2 $XXZ$ Heisenberg spin chain in a
magnetic field, using exact determinant representations for form factors on the
lattice. Multiparticle contributions are computed numerically throughout the
Brillouin zone, yielding saturation of the sum rule to high precision.

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