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Exact Charge Dynamics in the Supersymmetric<i><i>t</i></i>-<i><i>J</i></i>Model with Inverse-Square Interaction
The dynamical charge structure factor N ( Q ,ω) with Q smaller than the Fermi wave number is derived analytically for the one-dimensional supersymmetric t - J model with 1/ r 2 interaction. Strong spin-charge separation in dynamics is found. N ( Q ,ω) with a given electron density does …