More randomness from a prepare-and-measure scenario with independent devices
Abstract
How to generate genuine quantum randomness from untrusted devices is an important problem in quantum information processing. Inspired by previous work on a self-testing quantum random number generator [T. Lunghi et al., Phys. Rev. Lett. 114, 150501 (2015)], we present a method to generate quantum randomness from a prepare-and-measure scenario with independent devices. In existing protocols, the quantum randomness depends only on a witness value (e.g., Clauser-Horne-Shimony-Holt value), which is calculated with the observed probabilities. Differently, here all the observed probabilities are directly used to calculate the min-entropy in our method. Through numerical simulation, we find that the min-entropy of our proposed scheme is higher than that in the previous work when a typical untrusted Bennett-Brassard 1984 (BB84) setup is used. Consequently, thanks to the proposed method, more genuine quantum random numbers may be obtained than before.
Keywords
Cite
@article{arxiv.1604.01915,
title = {More randomness from a prepare-and-measure scenario with independent devices},
author = {Han Yun-Guang and Yin Zhen-Qiang and Li Hong-Wei and Chen Wei and Wang Shuang and Guo Guang-Can and Han Zheng-Fu},
journal= {arXiv preprint arXiv:1604.01915},
year = {2016}
}
Comments
8 pages, 3 figures