Quantum randomness protected against detection loophole attacks
Date
2021-01Author
Mironowicz, Piotr
Cañas, Gustavo
Cariñe, Jaime
Gómez, Esteban S.
Barra, Johanna F.
Cabello, Adán
Guilherme B., Xavier
Lima, Gustavo
Pawłowski, Marcin
Publisher
Quantum Information ProcessingDescription
ArticleMetadata
Show full item recordAbstract
Device and semi-device-independent private quantum randomness generators are crucial for applications requiring private randomness. However, they are vulnerable to
detection inefficiency attacks and this limits severely their usage for practical purposes. Here, we present a method for protecting semi-device-independent private
quantum randomness generators in prepare-and-measure scenarios against detection
inefficiency attacks. The key idea is the introduction of a blocking device that adds
failures in the communication between the preparation and measurement devices. We
prove that, for any detection efficiency, there is a blocking rate that provides protection against these attacks. We experimentally demonstrate the generation of private
randomness using weak coherent states and standard avalanche photo-detectors.