Successful Demonstration of Quantum Tele-amplification

The National Institute of Information and Communications Technology (NICT, President: Dr. Masao Sakauchi), in collaboration with Seoul National University, has invented and demonstrated a scheme, called “quantum tele-amplification”, that realizes noiseless teleportation of optical signals with an amplification gain between nodes in an optical network. This scheme can be used both for extending a distance of quantum cryptography and for processing signals to beat the capacity limit of optical communications, establishing a common foundation to long-distance quantum cryptography and low-power high-capacity communications. This result will be published in the June 2013 issue of “Nature Photonics”. This research was partly supported by the Quantum Information Processing Project in the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program) in Japan, and by a National Research Foundation of Korea grant (No. 2010-0018295).

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