New technologies enhance quantum cryptography

A team of Los Alamos National Laboratory scientists, in collaboration with researchers from the National Institute of Standards and Technology in Boulder, Colo., and Albion College, in Albion, Mich., have achieved quantum key distribution (QKD) at telecommunications industry wavelengths in a 50-kilometer (31 mile) optical fiber. The work could accelerate the development of QKD for secure communications in optical fibers at distances beyond current technological limits.