Weak-Localization in Chaotic Versus Non-Chaotic Cavities: A Striking   Difference in the Line Shape
  We report experimental evidence that chaotic and non-chaotic scattering through ballistic cavities display distinct signatures in quantum transport. In the case of non-chaotic cavities, we observe a linear decrease in the average resistance with magnetic field which contrasts markedly with a Lorentzian behavior for a chaotic cavity. This difference in line-shape of the weak-localization peak is related to the differing distribution of areas enclosed by electron trajectories. In addition, periodic oscillations are observed which are probably associated with the Aharonov-Bohm effect through a periodic orbit within the cavities. 
A. M. Chang, H. U. Baranger, L. N. Pfeiffer, and K. W. West