Conductance oscillations in interacting mesoscopic systems with multiple energy levels: Quantum interference

Abstract

By means of the equation of motion Green function method, the Meir-Wingreen-Lee theory of strongly interacting quantum dots with two energy levels is generalized to multiple energy levels in the self-consistent field approximation. It is found that both the conductance and magnetization display periodic oscillations in tunneling through an interacting mesoscopic system in an applied magnetic field. In particular, it is shown that oscillations in the conductance directly reflect quantum interference. Our results display qualitative agreement with experimental observations.