Key points are not available for this paper at this time.
In a recent Letter Phys. Rev. Lett. 67, 664 (1991) we found semiclassical propagation to be remarkably accurate in the chaotic stadium billiard long after classical fine structure had developed on a scale much smaller than. We give a complete account of that work and derive an approximate time scale for the validity of the semiclassical approximation as a function of.
Tomsovic et al. (Fri,) studied this question.