Experimental test of quantum causal influences

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dc.contributor.authorAgresti, Iris
dc.contributor.authorPoderini, Davide
dc.contributor.authorPolacchi, Beatrice
dc.contributor.authorMiklin, Nikolai
dc.contributor.authorGachechiladze, Mariami
dc.contributor.authorSuprano, Alessia
dc.contributor.authorPolino, Emanuele
dc.contributor.authorMilani, Giorgio
dc.contributor.authorCarvacho, Gonzalo
dc.contributor.authorAraújo, Rafael Chaves Souto
dc.contributor.authorSciarrino, Fabio
dc.date.accessioned2025-04-22T18:36:23Z
dc.date.available2025-04-22T18:36:23Z
dc.date.issued2022-02-25
dc.description.resumoSince Bell’s theorem, it is known that local realism fails to explain quantum phenomena. Bell inequality violations manifestly show the incompatibility of quantum theory with classical notions of cause and effect. As recently found, however, the instrumental scenario—a pivotal tool in causal inference—allows for nonclassicality signatures going beyond this paradigm. If we are not limited to observational data and can intervene in our setup, then we can witness quantum violations of classical bounds on the causal influence among the involved variables even when no Bell-like violation is possible. That is, through interventions, the quantum behavior of a system that would seem classical can be demonstrated. Using a photonic setup—faithfully implementing the instrumental causal structure and switching between observation and intervention run by run—we experimentally witness such a nonclassicality. We also test quantum bounds for the causal influence, showing that they provide a reliable tool for quantum causal modelingpt_BR
dc.identifier.citationGRESTI, Iris; PODERINI, Davide; POLACCHI, Beatrice; MIKLIN, Nikolai; GACHECHILADZE, Mariami; SUPRANO, Alessia; POLINO, Emanuele; MILANI, Giorgio; CARVACHO, Gonzalo; ARAUJO, Rafael Chaves Souto; SCIARRINO, Fabio. Experimental test of quantum causal influences. SCIENCE ADVANCES, v. 8, p. 022426, 2022. DOI 10.1126/sciadv.abm1515. Disponível em: https://www.science.org/doi/10.1126/sciadv.abm1515. Acesso em: 18 mar. 2025.pt_BR
dc.identifier.doihttp://dx.doi.org/10.1126/sciadv.abm1515
dc.identifier.issne2375-2548
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/63496
dc.languagept_BRpt_BR
dc.publisherSciance Advancespt_BR
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/deed.en
dc.subjectinfluências causais quânticaspt_BR
dc.subjectquantum causal influencespt_BR
dc.subjectTeoria quânticapt_BR
dc.subjectQuantum theorypt_BR
dc.subjectViolações quânticaspt_BR
dc.subjectQuantum violationspt_BR
dc.titleExperimental test of quantum causal influencespt_BR
dc.typearticlept_BR

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