SQUID

The SQUID design (two Josephson junctions) is the fundamental architecture underlying not just quantum computers but all quantum technologies including quantum radar, astronomical detectors, and potentially classified surveillance systems. The speaker notes that China's 'quantum radar' and various detection arrays likely use this same SQUID-based architecture. This suggests a convergence of quantum technologies around Josephson junction physics, with applications spanning computing, sensing, communication, and potentially weapon systems.