Superconducting circuits set world’s first 3.8M density with 10x thinner wires

Imec has set a world record by packing 3.8 million Josephson junctions into one square centimeter of superconducting circuit, while also producing wires just 30 nanometers wide, about 10 times thinner than conventional superconducting wires. These breakthroughs could help build denser, more energy-efficient computing systems for data centers and beyond. The circuits still require extremely low temperatures to work, which remains a key challenge for wider adoption.