  Universal chiral Luttinger liquid behavior has been predicted for fractional
quantum Hall edge states, but so far has not been observed experimentally in
semiconductor-based two-dimensional electron gases. One likely cause of this
absence of universality is the generic occurrence of edge reconstruction in
such systems, which is the result of a competition between confinement
potential and Coulomb repulsion. We show that due to a completely different
mechanism of confinement, edge reconstruction can be avoided in graphene, which
allows for the observation of the predicted universality.
