The paper presents a broad vision of a future global quantum internet, with original conceptual proposals like QTCP and quantum sneakernet, while explicitly acknowledging that much of its content is review.
2-GHz clock quantum key distribution over 260 km of standard telecom fiber
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abstract
We report a demonstration of quantum key distribution (QKD) over a standard telecom fiber exceeding 50 dB in loss and 250 km in length. The differential phase shift QKD protocol was chosen and implemented with 2 GHz system clock rate. By careful optimization of the 1-bit delayed Faraday-Michelson interferometer and the use of the super-conducting single photon detector (SSPD), we achieved a quantum bit error rate below 2% when the fiber length was no more than 205 km, and of 3.45% for the 260 km length fiber with 52.9 dB loss. We also improved the quantum efficiency of SSPD to obtain high key rate for 50 km length.
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quant-ph 1years
2025 1verdicts
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The Quantum Internet (Technical Version)
The paper presents a broad vision of a future global quantum internet, with original conceptual proposals like QTCP and quantum sneakernet, while explicitly acknowledging that much of its content is review.