Dephasing processes in quantum hall wires

Abstract

We study the effects of phase-breaking scattering processes on the electron conductance of quantum wires in strong magnetic fields. Our treatment makes use of the nonequilibrium Keldysh formalism and the self-consistent Born approximation for the many-body interactions. The differential conductance is carried out numerically by means of continued fractions and renormalization techniques within a tight-binding framework. We provide a unified description of dissipative and dissipationless currents, with clear crossovers from one to the other regime.