Experimental investigation of a regime of Wigner ergodicity in microwave rough billiards - art. no. 046208

We study experimentally a new regime of Wigner ergodicity [K.M. Frahm and D .L. Shepelyansky, Phys. Rev. Lett. 79, 1833 (1997)] in a microwave rough bi lliard. We show that in the Wigner regime, eigenstates are extended over th e whole energy surface but have a strongly peaked nonergodic structure The Shannon width of the eigenstate distributions is calculated to estimate the ir spreads and to find their departure from the ergodic distributions.