Experimental bilocality violation without shared reference frames

• Autor(a) principal: Andreoli, Francesco
• Data de Publicação: 2017
• Outros Autores: Carvacho, Gonzalo, Santodonato, Luca, Bentivegna, Marco, Araújo, Rafael Chaves Souto, Sciarrino, Fábio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/30216
• topic: Optical tests of quantum theory; Quantum communication; Quantum entanglement; Quantum measurements; Quantum nonlocality; Quantum simulation

Nonclassical correlations arising in complex quantum networks are attracting growing interest, both from a fundamental perspective and for potential applications in information processing. In particular, in an entanglement swapping scenario a newkind of correlations arise, the so-called nonbilocal correlations that are incompatible with local realism augmented with the assumption that the sources of states used in the experiment are independent. In practice, however, bilocality tests impose strict constraints on the experimental setup and in particular to the presence of shared reference frames between the parties. Here, we experimentally address this point showing that false positive nonbilocal quantum correlations can be observed even though the sources of states are independent. To overcome this problem, we propose and demonstrate a scheme for the violation of bilocality that does not require shared reference frames and thus constitutes an important building block for future investigations of quantum correlations in complex networks