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

被引：0
作者：
Duan Huang
Peng Huang
Dakai Lin
Guihua Zeng
机构：
[1] State Key Laboratory of Advanced Optical Communication Systems and Networks and Center of Quantum Information Sensing and Processing,
[2] Shanghai Jiao Tong University,undefined
[3] College of Information Science and Technology,undefined
[4] Northwest University,undefined
来源：
Scientific Reports | / 6卷
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摘要：
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.
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