EXACT RESULTS FOR THE LEVEL DENSITY AND 2-POINT CORRELATION-FUNCTION OF THE TRANSMISSION-MATRIX EIGENVALUES IN QUASI-ONE-DIMENSIONAL CONDUCTORS

We study transport properties of phase-coherent quasi-one-dimensional disordered conductors in the diffusive regime, in terms of the eigenva lue distribution of the two-terminal transmission matrix. Using an exp ansion in inverse powers of the classical conductance, we calculate th e average transmission eigenvalue density and the two-point correlatio n function for fluctuations in the density. A formula for the average value and the variance of a general linear statistic on the transmissi on eigenvalues is obtained. Our results confirm an earlier hypothesis, based on random-matrix theory, that fluctuations are universal in the diffusive regime and ultimately determined by level repulsion.