Computation of dynamical correlation functions of Heisenberg chains in a field
classification
❄️ cond-mat.str-el
cond-mat.stat-mechhep-th
keywords
fieldheisenbergspinbrillouinchainchainscomputationcompute
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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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