Phase dependent current statistics in short-arm Andreev interferometer
arXiv:cond-mat/0311176 · doi:10.1103/PhysRevB.70.064507
Abstract
We calculate analytically the current statistics for a short diffusive wire between the normal reservoir and a short superconductor-normal metal-superconductor (SNS) junction, at arbitrary applied voltages and temperatures. The cumulant-generating function oscillates with the phase difference across the junction, approaching the normal-state value at . At T=0 and at the applied voltage much smaller than the proximity gap , the current noise doubles and the third current cumulant is 4 times larger with respect to their values in the normal state; at they acquire large excess components. At the gap edge, , the effective transferred charge defined through and approaches and , respectively, which makes doubtful the interpretation of these quantities as physical elementary transferred charge. At , shows a non-monotonous voltage dependence with a dip near .
13 pages, to be published in Proc. NATO ARW "Quantum Transport in Metallic and Hybrid Nanostructures", StPetersburg, 2003
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