Enhancement of Decoherence by Chaotic-like Behavior

We demonstrate by use of a simple one-dimensional model of a square barrier imbedded in an infinite potential well that decoherence is enhanced by chaotic-like behavior. We, moreover, show that the transition h → 0 is singular. Finally it is argued that the time scale on which decoherence occurs depends on the degree of complexity of the underlying quantum mechanical system, i.e., more complex systems decohere relatively faster than less complex ones.