Abstract:
We carry out numerical diagonalization for much larger systems than before by restricting the fractional
quantum Hall (FQH) edge excitations to a basis that is exact for a short-range interaction and very
accurate for the Coulomb interaction. This enables us to perform substantial tests of the predicted
universality of the edge physics. Our results suggest the possibility that the behavior of the FQH edge is
intrinsically nonuniversal, even in the absence of edge reconstruction, and therefore may not bear a sharp
and unique relation to the nature of the bulk FQH state.
