Semiclassical theory of current correlations in chaotic dot-superconductor systems
P. Samuelsson, M. Büttiker
DOI 10.1103/PhysRevB.66.201306 · Physical Review B
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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.
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