COULOMB INTERACTION DURING COHERENT TRANSPORT OF ELECTRONS IN QUANTUMWIRES

A model is found whereby the Coulomb interaction during electron trans port in quantum wires of finite length with current-lead contacts can be taken into account exactly (within the framework of the bosonizatio n method). It is established that the charge density distribution alon g a wire in the case of the real Coulomb interaction is strongly diffe rent from the Luttinger liquid model, where the interaction is assumed to be short-ranged. The charge density near the contacts is found to be much higher than in the model with a short-range interaction, but a way from the contacts the two densities are closer to each other. (C) 1998 American Institute of Physics.