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Correlation functions of the XXZ spin-1/2 Heisenberg chain at the free fermion point from their multiple integral representations

N. Kitanine, J. M. Maillet, N. A. Slavnov, V. Terras

hep-tharXiv:hep-th/0203169

Abstract

Using multiple integral representations, we derive exact expressions for the correlation functions of the spin-1/2 Heisenberg chain at the free fermion point.

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