China achieves tamper-proof quantum communication over 100km with single atoms
AI Summary
Chinese researchers at the University of Science and Technology of China, led by Pan Jianwei, have achieved a breakthrough in quantum encryption. They demonstrated device-independent quantum key distribution (DI-QKD) over 100km of optical fiber using individual rubidium atoms trapped in laser beams at separate network nodes. This method creates secure quantum links using single photons and generates shared secret keys for encryption by comparing the atoms' states. The significance lies in its security, as it remains effective even if the devices are flawed or tampered with, addressing vulnerabilities in existing quantum communication systems. This experiment bridges the gap between theoretical DI-QKD and practical, real-world applications.
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