  By viewing the non-equilibrium transport setup as a quantum open system, we
propose a reduced-density-matrix based quantum transport formalism. At the
level of self-consistent Born approximation, it can precisely account for the
correlation between tunneling and the system internal many-body interaction,
leading to certain novel behavior such as the non-equilibrium Kondo effect. It
also opens a new way to construct time-dependent density functional theory for
transport through large-scale complex systems.
