Quantum fluctuations: Enhancement or suppression of chaos?
  We have studied the effects of quantum fluctuations on dynamical behavior by using squeezed state approach. Our numerical results of the kicked harmonic oscillator demonstrate qualitatively and quantitatively that quantum fluctuations can not only enhance chaos but also suppress classical diffusion. In addition, the squeezed state approach also gives a simple picture of dynamical localization. 
Bambi Hu, Baowen Li, Jie Liu and Ji-Lin Zhou (Department of Physics   and Centre for Nonlinear Studies, Hong Kong Baptist Un...