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Emptiness formation probability of the XXZ spin-1/2 Heisenberg chain at Delta=1/2

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

hep-tharXiv:hep-th/0201134

Abstract

Using a multiple integral representation for the correlation functions, we compute the emptiness formation probability of the XXZ spin-1/2 Heisenberg chain at anisotropy Delta=1/2. We prove it is expressed in term of the number of alternating sign matrices.

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