PSEUDOPARTICLE DESCRIPTION OF THE 1D HUBBARD-MODEL ELECTRONIC TRANSPORT-PROPERTIES

We extend the pseudoparticle transport description of the Hubbard chai n to all energy scales. In particular we compute the mean value of the electric current transported by any Bethe-ansatz state and the transp ort masses of the charge carriers. We present numerical results for th e optical conductivity of the model at half-filling for values of U/t = 3 and 4. We show that these are in good agreement with the pseudopar ticle description of the finite-energy transitions involving new pseud oparticle energy bands.