  String theory proves to be an imperative tool to explore the critical
behavior of the quantum dissipative system. We discuss the quantum particles
moving in two dimensions, in the presence of a uniform magnetic field, subject
to a periodic potential and a dissipative force, which are described by the
dissipative Wannier-Azbel-Hofstadter (DWAH) model. Using string theory
formulation of the model, we find that the elementary excitations of the system
at the generic points of the off-critical regions, in the zero temperature
limit are quons, which satisfy q-deformed statistics.
