Soliton S matrices for the critical A_{N-1}^(1) chain

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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12 pages, LaTeX; v2. contains ``Note Added'' and 1 more reference

Scientific paper

10.1016/S0370-2693(99)00873-4

We compute by Bethe Ansatz both bulk and boundary hole scattering matrices
for the critical A_{N-1}^(1) quantum spin chain. The bulk S matrix coincides
with the soliton S matrix for the A_{N-1}^(1) Toda field theory with imaginary
coupling. We verify our result for the boundary S matrix using a generalization
of the Ghoshal-Zamolodchikov boundary crossing relation.

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