Long-distance continuous-variable quantum key distribution by controlling excess noise

By Duan Huang, Peng Huang, Da-kai Lin, Guihua Zeng. Scientific Reports, 2016

364 citations recorded by the source corpus.

Quantum cryptography founded on the laws of physics could revolutionize the way in which communication information is protected. Significant progresses in long-distance quantum key distribution based on discrete variables have led to the secure quantum communication in real-world conditions being available. However, the alternative approach implemented with continuous variables has not yet reached the secure distance beyond 100 km. Here, we overcome the previous range limitation by controlling system excess noise and report such a long distance continuous-variable quantum key distribution experiment. Our result paves the road to the large-scale secure quantum communication with continuous variables and serves as a stepping stone in the quest for quantum network.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/6904ef50e1882278a8a93ef1e4206be1e64c9275

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In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Continuous‐Variable Quantum Key Distribution with Gaussian Modulation—The Theory of Practical Implementations (2017, background): “For example, a few papers so far successfully demonstrated long-distance CV-QKD with a non-zero key over a channel length of 80 to 100 km [17, 21].”
Long-distance continuous-variable quantum key distribution over 202.81 km fiber (2020, background): “For comparison, we also show previous state-of-the-art experimental results [11, 21] and we compare the values and the scaling of our rates with the PLOB bound [24], i.”