  Coupled quantum Hall edge channels show intriguing non-trivial modes, for
example, charge and neutral modes at Landau level filling factors 2 and 2/3. We
propose an appropriate and effective model with Coulomb interaction and
disorder-induced tunneling characterized by coupling capacitances and tunneling
conductances, respectively. This model explains how the transport eigenmodes,
within the interaction- and disorder-dominated regimes, change with the
coupling capacitance, tunneling conductance, and measurement frequency. We
propose frequency- and time-domain transport experiments, from which eigenmodes
can be determined using this model.
