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Computation of dynamical correlation functions of Heisenberg chains in a field

J. -S. Caux 1 Jean Michel Maillet 2 
1 IFTA - Institute for Theoretical Physics [Amsterdam]
2 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
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.
Keywords : spin chain Correlation functions Bethe ansatz Quantum integrable models
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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00266558
Contributor : Jean Michel Maillet Connect in order to contact the contributor
Submitted on : Monday, March 24, 2008 - 10:17:44 PM
Last modification on : Friday, November 13, 2020 - 3:28:04 PM

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J. -S. Caux, Jean Michel Maillet. Computation of dynamical correlation functions of Heisenberg chains in a field. Physical Review Letters, American Physical Society, 2005, 95 (077201), pp.077201. ⟨10.1103/PhysRevLett.95.077201⟩. ⟨ensl-00266558⟩

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