Transmission Eigenvalue Densities and Moments in Chaotic Cavities from Random Matrix Theory

Details Transmission Eigenvalue Densities and Moments in Chaotic Cavities from Random Matrix Theory Transmission Eigenvalue Densities and Moments in Chaotic Cavities from Random Matrix Theory

2008-01-19

arxiv.org/abs/0801.3026v3

J. Phys. A: Math. Theor. 41 (2008) 122004 (Fast Track Communication)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Slight extension of the published version. One reference added; main result (16) simplified

Scientific paper

We point out that the transmission eigenvalue density and higher order correlation functions in chaotic cavities for an arbitrary number of incoming and outgoing leads $(N_1,N_2)$ are analytically known from the Jacobi ensemble of Random Matrix Theory. Using this result and a simple linear statistic, we give an exact and non-perturbative expression for moments of the form $<\lambda_1^m>$ for $m>-|N_1-N_2|-1$ and $\beta=2$, thus improving the existing results in the literature. Secondly, we offer an independent derivation of the average density and higher order correlation functions for $\beta=2,4$ which does not make use of the orthogonal polynomials technique. This result may be relevant for an efficient numerical implementation avoiding determinants.

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