Computation of dynamical correlation functions of Heisenberg chains in a field

J. -S. Caux; J. -M. Maillet

doi:10.1103/physrevlett.95.077201

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Computation of dynamical correlation functions of Heisenberg chains in a field

J. -S. Caux·J. -M. Maillet

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Abstract

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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J. -S. Caux, J. -M. Maillet. 2005-02-15. Computation of dynamical correlation functions of Heisenberg chains in a field. https://doi.org/10.1103/physrevlett.95.077201

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