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Quantum computing: Japan takes step toward light-based technology

NTT, University of Tokyo and Riken aim for full-fledged system by 2030

"Squeezed light" is sent through optical fibers for quantum information processing.

TOKYO -- A Japanese team of scientists on Wednesday announced a key step in the development of a quantum computer using photons, or particles of light, that eliminates the need for an ultracold environment used to cool existing machines.

The team including Nippon Telegraph and Telephone, the University of Tokyo and Japan's Riken research institute has developed a high-performance source of "squeezed light" used to transmit information in optical quantum computing.

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