Smith, Richard C.; Lawson, J.O. - In: Physica A: Statistical Mechanics and its Applications 83 (1975) 3, pp. 505-518
A modified Green's function determination of the conduction and insulator limit conductivities of the one-dimensional, half-filled band, Hubbard model is presented in a simplified version to avoid the difficulties which are encountered in some instances in utilizing commutator Green's functions...