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Characterization of Flux Trapping in and Fabrication of Large-Scale Superconductor Circuits Using AC-Biased Shift Registers With 108500 Josephson Junctions
A variety of superconductor integrated circuits comprising six ac-powered SFQ shift registers with a total of 27078 bits and 108500 Josephson junctions (JJs) per 5 mm x 5 mm chip have been designed, fabricated, and tested to characterize flux trapping, fabrication process yield, and parameter spread. The six 4513-bit registers …