Witnessing nonclassicality in a causal structure with three observable variables

Página do item simplificado Estatísticas
dc.contributor.authorLauand, Pedro
dc.contributor.authorPoderini, Davide
dc.contributor.authorNery, Ranieri Vieira
dc.contributor.authorMoreno Filho, Marcos George Magalhães
dc.contributor.authorPollyceno, Lucas
dc.contributor.authorRabelo, Rafael
dc.contributor.authorAraújo, Rafael Chaves Souto
dc.date.accessioned2025-04-22T17:23:52Z
dc.date.available2025-04-22T17:23:52Z
dc.date.issued2023-04-20
dc.description.resumoSeen from the modern lens of causal inference, Bell’s theorem is nothing other than the proof that a specific classical causal model cannot explain quantum correlations. It is thus natural to move beyond Bell’s paradigmatic scenario and consider different causal structures. For the specific case of three observable variables, it is known that there are three nontrivial causal networks. Two of those are known to give rise to quantum nonclassicality: the instrumental and the triangle scenarios. Here we analyze the third and remaining one, which we name the Evans scenario, akin to the causal structure underlying the entanglement-swapping experiment. We prove a number of results about this elusive scenario and introduce new and efficient computational tools for its analysis that can also be adapted to deal with more general causal structures. We do not solve its main open problem—whether quantum nonclassical correlations can arise from it—but give a significant step in this direction by proving that postquantum correlations, analogous to the paradigmatic Popescu-Rohrlich box, do violate the constraints imposed by a classical description of the Evans causal structurept_BR
dc.identifier.citationLAUAND, Pedro; PODERINI, Davide; NERY, Ranieri; MORENO, George; POLLYCENO, Lucas; RABELO, Rafael; Araujo, Rafael Chaves Souto. Witnessing Nonclassicality in a Causal Structure with Three Observable Variables. Prx Quantum, v. 4, p. 020311, 2023. DOI 10.1103/PRXQuantum.4.020311. Disponível em: https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuantum.4.020311. Acesso em: 18 mar. 2025.pt_BR
dc.identifier.doihttps://doi.org/10.1103/PRXQuantum.4.020311
dc.identifier.issne2691-3399
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/63492
dc.languagept_BRpt_BR
dc.publisherPRX Quantumpt_BR
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectQuantum Fundationspt_BR
dc.subjectQuantum correlations in quantum informationpt_BR
dc.titleWitnessing nonclassicality in a causal structure with three observable variablespt_BR
dc.typearticlept_BR

Arquivos

Pacote Original

Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
WitnessingNonclassicalityCausal_Lauand_2023.pdf
Tamanho:
987.57 KB
Formato:
Adobe Portable Document Format
Nenhuma Miniatura disponível
Baixar

Licença do Pacote

Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.45 KB
Formato:
Item-specific license agreed upon to submission
Nenhuma Miniatura disponível
Baixar

Coleções

ECT - Artigos publicados em periódicos
IIF - Artigos publicados em periódicos
Instituto Ágora - Artigos publicados em periódicos
Repositório Institucional - UFRN Campus Universitário Lagoa NovaCEP 59078-970 Caixa postal 1524 Natal/RN - BrasilUniversidade Federal do Rio Grande do Norte© Copyright 2025. Todos os direitos reservados.
Contato+55 (84) 3342-2260 - R232Setor de Repositórios Digitaisrepositorio@bczm.ufrn.br
DSpaceIBICT
OasisBR
LAReferencia
Customizado pela CAT - BCZM