Field Theory of mesoscopic fluctuations in superconductor/normal-metal systems
Altland A., Simons B.D., Taras-Semchuk D.
PACS: 05.40.+j, 72.80.Ng, 73.23.-b, 74.40.+k
Thermodynamic and transport properties of normal disordered conductors are strongly influenced by the proximity of a superconductor. A cooperation between mesoscopic coherence and Andreev scattering of particles from the superconductor generates new types of interference phenomena. We introduce a field theoretic approach capable of exploring both averaged properties and mesoscopic fluctuations of superconductor/normal-metal systems. As an example the method is applied to the study of the level statistics of a SNS-junction.