Causal Networks and Freedom of Choice in Bell’s Theorem

dc.contributor.authorAraújo, Rafael Chaves Souto
dc.contributor.authorMoreno Filho, Marcos George Magalhães
dc.contributor.authorPolino, Emanuele
dc.contributor.authorPoderini, Davide
dc.contributor.authorAgresti, Iris
dc.contributor.authorSuprano, Alessia
dc.contributor.authorBarros, Mariana Rodrigues
dc.contributor.authorCarvacho, Gonzalo
dc.contributor.authorWolfe, Elie
dc.contributor.authorCanabarro, Askery
dc.contributor.authorSpekkens, Robert W.
dc.contributor.authorSciarrino, Fabio
dc.date.accessioned2025-05-28T16:37:28Z
dc.date.available2025-05-28T16:37:28Z
dc.date.issued2021-11-03
dc.description.resumoBell’s theorem is typically understood as the proof that quantum theory is incompatible with local-hidden-variable models. More generally, we can see the violation of a Bell inequality as witnessing the impossibility of explaining quantum correlations with classical causal models. The violation of a Bell inequality, however, does not exclude classical models where some level of measurement dependence is allowed, that is, the choice made by observers can be correlated with the source generating the systems to be measured. Here, we show that the level of measurement dependence can be quantitatively upper bounded if we arrange the Bell test within a network. Furthermore, we also prove that these results can be adapted in order to derive nonlinear Bell inequalities for a large class of causal networks and to identify quantumly realizable correlations that violate them.pt_BR
dc.identifier.citationARAÚJO, Rafael Chaves Souto; MORENO FILHO, Marcos George Magalhães; POLINO, Emanuele ; PODERINI, Davide ; AGRESTI, Iris; SUPRANO, Alessia; BARROS, Mariana Rodrigues; CARVALHO, Gonzalo; WOLFE, Elie ; CANABARRO, Askery; SPEKKENS, Robert W.; SCIARRINO, Fabio. Causal Networks and Freedom of Choice in Bell?s Theorem. PRX Quantum, v. 2, p. 040323, 2021. DOI 10.1103/PRXQuantum.2.040323. Disponível em: https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuantum.2.040323. Acesso em: 19 mar. 2025.
dc.identifier.doi10.1103/PRXQuantum.2.040323
dc.identifier.issn2691-3399
dc.identifier.otherDOI 10.1103/PRXQuantum.2.040323
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/63701
dc.languageenpt_BR
dc.language.isoen
dc.publisherPRX Quantumpt_BR
dc.subjectNonlocalitypt_BR
dc.subjectNão localidadept_BR
dc.subjectQuantum entanglementpt_BR
dc.subjectEmaranhamento quânticopt_BR
dc.subjectQuantum networkspt_BR
dc.subjectRedes quânticaspt_BR
dc.titleCausal Networks and Freedom of Choice in Bell’s Theorempt_BR
dc.typearticlept_BR

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