Ergodicity of Random-Matrix Theories: The Unitary Case
arXiv:cond-mat/9912458 · doi:10.1103/PhysRevLett.84.2833
Abstract
We prove ergodicity of unitary random-matrix theories by showing that the autocorrelation function with respect to energy or magnetic field strength of any observable vanishes asymptotically. We do so using Efetov's supersymmetry method, a polar decomposition of the saddle-point manifold, and an asymptotic evaluation of the boundary terms generated in this fashion.
4 pages