Physical nonlinear aspects of classical and quantum q-oscillators
  The classical limit of quantum q-oscillators suggests an interpretation of the deformation as a way to introduce non linearity. Guided by this idea, we considered q-fields, the partition fumction, and compute a consequence on specific heat and second order correlation function of the q-oscillator which may serve for experimental checks for the non linearity. 
V.I.Man'ko G.Marmo, S.Solimeno, F.Zaccaria