Physics – Condensed Matter
Scientific paper
1995-04-25
Physics
Condensed Matter
33 pages, 7 postscript figures, the presented abstract is shortened in comparison to the abstract of the paper
Scientific paper
10.1051/jp1:1995111
The parametric correlations of the transmission eigenvalues $T_i$ of a $N$-channel quantum scatterer are calculated assuming two different Brownian motion ensembles. The first one is the original ensemble introduced by Dyson and assumes an isotropic diffusion for the $S$-matrix. The second Brownian motion ensemble assumes for the transfer matrix $M$ an isotropic diffusion yielded by a multiplicative combination law. We review the qualitative differences between transmission through two weakly coupled quantum dots and through a disordered line and we discuss the mathematical analogies between the Fokker-Planck equations of the two Brownian motion models.
Frahm Klaus
Pichard Jean-Louis
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