  Questions on the nature of edge reconstruction and "where does the current
flow" in the quantum Hall effect (QHE) have been debated for years. Moreover,
the recent observation of proliferation of "upstream" neutral modes in the
fractional QHE raised doubts about the present models of edge channels. In this
article we focus on hole-conjugate states, nu=2/3 and nu=3/5, and present a new
picture of their edge reconstruction. For example, while the present model for
nu=2/3 consists of a single downstream charge channel with conductance 2/3
e^2/h and an upstream neutral mode, we show that the current is carried by two
separate downstream edge channels, each with conductance 1/3 e^2/h, accompanied
by upstream neutral mode(s). We find that if the two downstream channels are
not equilibrated, inter-mode equilibration (via particle exchange) takes place
over a distance of microns, with the two channels effectively behaving as a
single channel. Moreover, the inter-channel equilibration is accompanied by an
excitation of upstream neutral modes. In turn, the counter-propagating neutral
modes, moving in close proximity to the charge modes, fragment into propagating
charges, inducing thus downstream current fluctuations with zero net current -
a novel mechanism for non-equilibrium noise. This unexpected edge
reconstruction underlines the need for better understanding of edge
reconstruction and energy transport in all fractional QHE states.
