Josephson computer technology

A major obstacle to the further miniaturization and higher speed of computers is the dissipation on an integrated circuit chip. The use of Josephson junction devices is potentially a solution to this problem and much research was done in 1980s. Results were disappointing, mainly because of technical problems in making stable junction electrodes. Recently, however, a new approach by Japanese workers shows how these difficulties may be overcome and computers based on the Josephson effect are again the subject of much research.