Computation of dynamical correlation functions of heisenberg chains in a magnetic field |
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Authors: | Caux Jean-Sébastien Maillet Jean Michel |
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Institution: | Institute for Theoretical Physics, University of Amsterdam, The Netherlands. |
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Abstract: | We compute the momentum- and frequency-dependent longitudinal spin structure factor for the spin-1/2 XXZ Heisenberg spin chain in a magnetic field, using exact determinant representations for form factors on the lattice. Multiparticle (i.e., multispinon) contributions are computed numerically throughout the Brillouin zone, yielding saturation of the sum rule to high precision. |
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