Experimental device-independent certified randomness generation with an instrumental causal structure

Autor(es)

Agresti, Iris ^[1] ; Poderini, Davide ^{[1, 2]} ; Guerini, Leonardo ^[3] ; Mancusi, Michele ^{[1, 2]} ; Carvacho, Gonzalo ^{[1, 2]} ; Aolita, Leandro ^[4] ; Cavalcanti, Daniel ^[5] ; Chaves, Rafael ^{[6, 7]} ; Sciarrino, Fabio ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Sapienza Univ Roma, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome - Italy

^[2] Chaves, Rafael, Univ Fed Rio Grande do Norte, Sch Sci \& Technol, BR-59078970 Natal, RN, Brazil.Agresti, Iris, Sapienza Univ Roma, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome - Italy

^[3] Univ Estadual Paulista, Int Ctr Theoret Phys, South Amer Inst Fundamental Res, Inst Fis Teor, R Dr Bento T Ferraz 271, BR-01140070 Sao Paulo - Brazil

^[4] Univ Fed Rio de Janeiro, Inst Fis, Caixa Postal 68528, BR-21941972 Rio De Janeiro, RJ - Brazil

^[5] Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, E-08860 Barcelona - Spain

^[6] Univ Fed Rio Grande do Norte, Sch Sci & Technol, BR-59078970 Natal, RN - Brazil

^[7] Univ Fed Rio Grande do Norte, Int Inst Phys, POB 1613, BR-59078970 Natal, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COMMUNICATIONS PHYSICS; v. 3, n. 1 JUN 18 2020.
• Citações Web of Science: 1

Resumo

The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers, a central challenge for a plethora of fields. Bell non-local correlations obtained by measurements on entangled states allow for the generation of bit strings whose randomness is guaranteed in a device-independent manner, i.e. without assumptions on the measurement and state-generation devices. Here, we generate this strong form of certified randomness on a new platform: the so-called instrumental scenario, which is central to the field of causal inference. First, we theoretically show that certified random bits, private against general quantum adversaries, can be extracted exploiting device-independent quantum instrumental-inequality violations. Then, we experimentally implement the corresponding randomness-generation protocol using entangled photons and active feed-forward of information. Moreover, we show that, for low levels of noise, our protocol offers an advantage over the simplest Bell-nonlocality protocol based on the Clauser-Horn-Shimony-Holt inequality. Random number generation has applications spanning several sectors, from scientific research to cryptography, with the intrinsic random nature of quantum physics allows to obtain truly random sequences. The authors present a proof-of principle implementation of a device-independent random number generator protocol, whose effectiveness is certified by quantum instrumental correlations, which also ensures privacy with respect to any quantum adversarial attack. (AU)

• Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
• Beneficiário: Nathan Jacob Berkovits
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
• Processo FAPESP: 18/04208-9 - Simulabilidade da medida quântica e aplicações a não-localidade de Bell
• Beneficiário: Leonardo Guerini de Souza
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado