Quantum superconductor-metal transition in a proximity array

A theory of the zero-temperature superconductor-metal transition is developed for an array of superconductive islands (of size d) coupled via a disordered two-dimensional conductor with the dimensionless conductance g = h/e2 R□ >> 1. At T = 0 macroscopically superconductive state of the array with lattice spacing b >> d is destroyed at g < gc ∼ 0.1 ln2 (b/d). At high temperatures the normal-state resistance between neighboring islands at b = bc is much smaller than RQ = h/4e2. (5. superconductor-metal-insulator transitions)