COMPLETE SOLUTION OF THE XXZ-MODEL ON FINITE RINGS. DYNAMICAL STRUCTURE FACTORS AT ZERO TEMPERATURE.
Abstract
The finite size effects of the dynamical structure factors in the XXZ-model are studied in the euclidean time (τ)-representation. Away from the critical momentum p=π finite size effects turn out to be small except for the large τ limit. The large finite size effects at the critical momentum p=π signal the emergence of infrared singularities in the spectral (ω)-representation of the dynamical structure factors.
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