Experimental realization of device-independent quantum randomness expansion [article]

Ming-Han Li, Xingjian Zhang, Wen-Zhao Liu, Si-Ran Zhao, Bing Bai, Yang Liu, Qi Zhao, Yuxiang Peng, Jun Zhang, Yanbao Zhang, William J. Munro, Xiongfeng Ma, Qiang Zhang (+2 others)
<span title="2019-12-24">2019</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Randomness expansion where one generates a longer sequence of random numbers from a short one is viable in quantum mechanics but not allowed classically. Device-independent quantum randomness expansion provides a randomness resource of the highest security level. Here we report the first experimental realization of device-independent quantum randomness expansion secure against quantum side information established through quantum probability estimation. We generate 5.47×10^8 quantum-proof random
more &raquo; ... bits while consuming 4.39×10^8 bits of entropy, expanding our store of randomness by 1.08×10^8 bits at a latency of about 12.5 hours, with a total soundness error 4.6×10^-10. Device-independent quantum randomness expansion not only furthers our understanding of randomness but also sets a solid base to bring quantum-certifiable random bits into realistic applications.
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1902.07529v2">arXiv:1902.07529v2</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/liwhkgs47neyrmw5kb5o5cdavy">fatcat:liwhkgs47neyrmw5kb5o5cdavy</a> </span>
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