3 years ago

High-Speed Device-Independent Quantum Random Number Generation without a Detection Loophole.

High-Speed Device-Independent Quantum Random Number Generation without a Detection Loophole.
Qiang Zhang, Yuan Cao, Cheng-Zhi Peng, Hao Li, Weijun Zhang, Yang Liu, Jiaqiang Zhong, Xiongfeng Ma, Sheng-Cai Shi, Jian-Wei Pan, Jingyun Fan, Lixing You, Luo-Kan Chen, Zhen Wang, Yu-Ao Chen, Yu-Huai Li, Ming-Han Li, Xiao Yuan, Qi Zhao, Tianyi Peng
Quantum mechanics provides the means of generating genuine randomness that is impossible with deterministic classical processes. Remarkably, the unpredictability of randomness can be certified in a manner that is independent of implementation devices. Here, we present an experimental study of device-independent quantum random number generation based on a detection-loophole-free Bell test with entangled photons. In the randomness analysis, without the independent identical distribution assumption, we consider the worst case scenario that the adversary launches the most powerful attacks against the quantum adversary. After considering statistical fluctuations and applying an 80  Gb×45.6  Mb Toeplitz matrix hashing, we achieve a final random bit rate of 114  bits/s, with a failure probability less than 10^{-5}. This marks a critical step towards realistic applications in cryptography and fundamental physics tests.

Publisher URL: http://doi.org/10.1103/PhysRevLett.120.010503

DOI: 10.1103/PhysRevLett.120.010503

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