Magnetic quantum objects in superconductors, so-called “fluxons,” are particularly suitable for the storage and processing of data bits. Computer circuits based on fluxons could be operated with significantly higher speed while dissipating much less heat. Physicists working with Wolfgang Lang at the University of Vienna and their colleagues at the Johannes-Kepler-University Linz have developed a “quantum egg carton” with a novel and simple method. They realized a stable and regular arrangement of hundreds of thousands of fluxons—a groundbreaking development for circuits based on fluxons. The results appear in the journal Physical Review Applied of the American Physical Society.