Shot noise in semiclassical chaotic cavities.
We construct a trajectory-based semiclassical theory of shot noise in clean chaotic cavities. In the universal regime of vanishing Ehrenfest time tau(E), we reproduce the random matrix theory result and show that the Fano factor is exponentially suppressed as tau(E) increases. We demonstrate how our theory preserves the unitarity of the scattering matrix even in the regime of finite tau(E). We discuss the range of validity of our semiclassical approach and point out subtleties relevant to the recent semiclassical treatment of shot noise in the universal regime by Braun et al. (cond-mat/0511292).
Whitney
Robert S
RS
Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland and Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble, France.
Jacquod
Ph
P