Ab initio experimental violation of Bell inequalities

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dc.contributor.authorPoderini, Davide
dc.contributor.authorPolino, Emanuele
dc.contributor.authorRodari, Giovanni
dc.contributor.authorSuprano, Alessia
dc.contributor.authorAraújo, Rafael Chaves Souto
dc.contributor.authorSciarrino, Fabio
dc.date.accessioned2025-04-22T18:47:17Z
dc.date.available2025-04-22T18:47:17Z
dc.date.issued2022-02-28
dc.description.resumoThe violation of a Bell inequality is the paradigmatic example of device-independent quantum information: The nonclassicality of the data is certified without the knowledge of the functioning of devices. In practice, however, all Bell experiments rely on the precise understanding of the underlying physical mechanisms. Given that, it is natural to ask: Can one witness nonclassical behavior in a truly black-box scenario? Here, we propose and implement, computationally and experimentally, a solution to this ab initio task. It exploits a robust automated optimization approach based on the stochastic Nelder-Mead algorithm. Treating preparation and measurement devices as black boxes, and relying on the observed statistics only, our adaptive protocol approaches the optimal Bell inequality violation after a limited number of iterations for a variety photonic states, measurement responses, and Bell scenarios. In particular, we exploit it for randomness certification from unknown states and measurements. Our results demonstrate the power of automated algorithms, opening a venue for the experimental implementation of device-independent quantum technologiespt_BR
dc.identifier.citationPODERINI, Davide; POLINO, Emanuele; RODARI, Giovanni; SUPRANO, Alessia; ARAUJO, Rafael Chaves Souto; SCIARRINO, Fabio. Ab initio experimental violation of Bell inequalities. Physical Review Research, v. 4, p. 013159, 2022. DOI 10.1103/PhysRevResearch.4.013159. Disponível em: https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.4.013159. Acesso em: 18 mar. 2025.pt_BR
dc.identifier.doihttps://doi.org/10.1103/PhysRevResearch.4.013159
dc.identifier.issne2643-1564
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/63497
dc.languagept_BRpt_BR
dc.publisherPhysical Review Researchpt_BR
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectNonlocalitypt_BR
dc.subjectOptical quantum information processingpt_BR
dc.subjectProcessamento óptico de informações quânticaspt_BR
dc.subjectQuantum correlations in quantum informationpt_BR
dc.subjectCorrelações quânticas em informação quânticapt_BR
dc.titleAb initio experimental violation of Bell inequalitiespt_BR
dc.typearticlept_BR

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