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- W4317941948 abstract "Quantum-dot-based single-photon sources are key assets for quantum information technology, supplying on-demand scalable quantum resources for computing and communication. However, longlasting issues such as limited long-term stability and source brightness have traditionally impeded their adoption in real-world applications. Here, we realize a quantum key distribution field trial using true single photons across an 18-km-long dark fibre, located in the Copenhagen metropolitan area, using an optimized, state-of-the-art, quantum-dot single-photon source frequency-converted to the telecom wavelength. A secret key generation rate of >2 kbits/s realized over a 9.6 dB channel loss is achieved with a polarization-encoded BB84 scheme, showing remarkable stability for more than 24 hours of continuous operation. Our results highlight the maturity of deterministic single-photon source technology while paving the way for advanced single-photon-based communication protocols, including fully device-independent quantum key distribution, towards the goal of a quantum internet." @default.
- W4317941948 created "2023-01-25" @default.
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- W4317941948 date "2023-01-23" @default.
- W4317941948 modified "2023-10-16" @default.
- W4317941948 title "Quantum Key Distribution using Deterministic Single-Photon Sources over a Field-Installed Fibre Link" @default.
- W4317941948 doi "https://doi.org/10.48550/arxiv.2301.09399" @default.
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