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Title

Megahertz-Rate Semi-Device-Independent Quantum Random Number Generators Based on Unambiguous State Discrimination

Authors
Esposito, William
Published in Physical Review Applied. 2017, vol. 7, no. 5, p. 054018
Abstract An approach to quantum random number generation based on unambiguous quantum state discrimination is developed. We consider a prepare-and-measure protocol, where two nonorthogonal quantum states can be prepared, and a measurement device aims at unambiguously discriminating between them. Because the states are nonorthogonal, this necessarily leads to a minimal rate of inconclusive events whose occurrence must be genuinely random and which provide the randomness source that we exploit. Our protocol is semi-device-independent in the sense that the output entropy can be lower bounded based on experimental data and a few general assumptions about the setup alone. It is also practically relevant, which we demonstrate by realizing a simple optical implementation, achieving rates of 16.5 Mbits/s. Combining ease of implementation, a high rate, and a real-time entropy estimation, our protocol represents a promising approach intermediate between fully device-independent protocols and commercial quantum random number generators.
Keywords RandomnessQuantum random number generator
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Research groups Groupe Zbinden
Groupe Brunner
Project FNS: 200021-159592, QSIT
Citation
(ISO format)
BRASK, Jonatan et al. Megahertz-Rate Semi-Device-Independent Quantum Random Number Generators Based on Unambiguous State Discrimination. In: Physical Review Applied, 2017, vol. 7, n° 5, p. 054018. https://archive-ouverte.unige.ch/unige:94510

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Deposited on : 2017-05-29

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