Semiclassical theory of current correlations in chaotic dot-superconductor systems
arXiv:cond-mat/0207585 · doi:10.1103/PhysRevB.66.201306
Abstract
We present a semiclassical theory of current correlations in multiterminal chaotic dot-superconductor junctions, valid in the absence of the proximity effect in the dot. For a dominating coupling of the dot to the normal terminals and a nonperfect dot-superconductor interface, positive cross correlations are found between currents in the normal terminals. This demonstrates that positive cross correlations can be described within a semiclassical approach. We show that the semiclassical approach is equivalent to a quantum mechanical Green's function approach with suppressed proximity effect in the dot.
5 pages, 3 figures
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