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Self-testing quantum random-number generator based on an energy bound

par Rusca, Davide;Van Himbeeck, Thomas ;Martin, Anthony;Brask Bohr, Jonatan;Shi, Weixu;Pironio, Stefano ;Brunner, Nicolas;Zbinden, Hugo
Référence Physical Review A, 100, 6, 062338
Publication Publié, 2019-12

Article révisé par les pairs

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Résumé :

We introduce a scheme for a self-testing quantum random-number generator and demonstrate it experimentally. Compared to the fully device-independent model, our scheme requires an extra natural assumption, namely, that the mean number of photons of the signal optical modes is bounded. The scheme is self-testing, as it allows the user to verify in real time the correct functioning of the setup, hence guaranteeing the continuous generation of certified random bits. The scheme is based on a prepare-and-measure setup, which we implement in a proof-of-principle experiment using only off-the-shelf optical components. The randomness generation rate is 1.25 Mbits/s, comparable to commercial solutions. Overall, we believe that this scheme achieves a promising trade-off between the required assumptions, ease of implementation and performance.