  We consider the effect of electron-phonon interactions on edge states in
quantum Hall systems with a single edge branch. The presence of electron-phonon
interactions modifies the single-particle propagator for general quantum Hall
edges, and, in particular, destroys the Fermi liquid even at integer filling.
The effect of the electron-phonon interactions may be detected experimentally
in the AC conductance or in the tunneling conductance between integer quantum
Hall edges.
