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We improve the density-matrix renormalization group (DMRG) evaluation of theKubo formula for the zero-temperature linear conductance of one-dimensionalcorrelated systems.The dynamical DMRG is used to compute the linear response ofa finite system to an applied AC source-drain voltage, then the low-frequencyfinite-system response is extrapolated to the thermodynamic limit to obtain theDC conductance of an infinite system. The method is demonstrated on theone-dimensional spinless fermion model at half filling. Our method is able toreplicate several predictions of the Luttinger liquid theory such as therenormalization of the conductance in an homogeneous conductor, the universaleffects of a single barrier, and the resonant tunneling through a doublebarrier.

Density-matrix renormalization group method for the conductance of one-dimensional correlated systems using the Kubo formula