Squeezed state dynamics of kicked quantum systems
  We study kicked quantum systems by using the squeezed state approach. Taking the kicked quantum harmonic oscillator as an example, we demonstrate that chaos in an underlying classical system can be enhanced as well as suppressed by quantum fluctuations. Three different energy diffusions are observed in the kicked quantum harmonic oscillator, namely, localization, linear diffusion, and quadratic diffusion. 
Bambi Hu, Baowen Li, Jie Liu, and Ji-Lin Zhou (Department of Physics   and Center for Nonlinear Studies, Hong Kong Baptist U...