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    Two-Photon Comb Technique Supports 20-km Distribution for Quantum Communication

    Article obtained from Photonics RSS Feed.

    In telecom networks connected by fiber optic cable, transmitted photons tend to be absorbed by the material that comprises the cable after traveling just a few kilometers. To prevent the signal from deteriorating, repeaters are placed at regular intervals of the cable to amplify the signal.

    Efforts to transmit photons over a quantum internet will face a similar challenge. Professor Tomoyuki Horikiri and colleagues at Yokohama National University are tackling this issue by developing a new source of entangled photons.

    While entangled photons could be used to transfer information, long-distance quantum communication could suffer from optical fiber losses, with entangled photons becoming disentangled due to interaction with their…

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    Aug, 31 2020 |

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