Quasiclassical theory of superconductivity: interfering paths

Abstract

We apply the method of two-point quasiclassical Green's function to geometries where the trajectories include interfering paths and loops. For a system of two superconducting layers separated by partially transparent interface, corrections to the quasiclassical solutions for the Green's function are explicitly found as well as the deviation from the normalization condition.

16 pages, 14 figures; Accepted for publication in Phys. Rev. B

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