Semiclassical theory of current correlations in chaotic dot-superconductor systems

P. Samuelsson, M. Büttiker
2002 Physical Review B (Condensed Matter)  
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
more » ... s equivalent to a quantum mechanical Green's function approach with suppressed proximity effect in the dot.
doi:10.1103/physrevb.66.201306 fatcat:gjp2b7fcffc6nmrxmq2cvu4hyy