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Quantum communication lies at the heart of unconditionally secure communication as well as quantum internet, which find potential applications such as distributed quantum computing and very-long-baseline telescope. We are developing a quantum network consisting of intracity or intercity user nodes in the metropolitan area that are capable of operating quantum and classical communication in parallel. We are also developing advanced quantum technologies for boosting the performance of our quantum communication network, including single-photon sources, entangled-photon sources, quantum frequency converters, quantum memories, and single-photon detectors.
A quantum communication network in the metropolitan area
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Co-PI
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Ite A. Yu (National Tsing-Hua University)
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Yong-Fan Chen (National Tsing-Hua University)
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Shiang-Yu Wang (Academia Sinica)
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Che-Ming Li (National Cheng Kung University)
Intercity quantum key distribution
We have demonstrated the first intercity quantum key distribution (QKD) in Taiwan using a commercial fiber. The QKD allows us to create and distribute secure keys at a few kbps over 10 kilometers and an overall loss of 6 dB. Together with the star-type quantum network that we demonstrated last year, it paves the way for developing a nationwide quantum network.
Left panel: Illustration of long-distance encrypted communication using the intercity quantum key distribution.
Right panel: Illustration of intercity fiber.