Abstract
The Green functions of the anisotropic Heisenberg model are studied by a method which was applied previously to the reduced density matrices. Integral equations are used to prove the existence of the infinite volume limit of the Green functions, and some analyticity properties with respect to the fugacity (or magnetic field), the potentials, and the complex times.
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Gruber, C.: Princeton Thesis, unpublished.
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Research supported by the National Science Foundation.
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Ginibre, J., Gruber, C. Green functions of the anisotropic Heisenberg model. Commun.Math. Phys. 11, 198–213 (1969). https://doi.org/10.1007/BF01645806
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DOI: https://doi.org/10.1007/BF01645806