Classical limits and contextuality in a scenario of multiple observers

Autor: Baldijão, Roberto Dobal, 1991, Terra-Cunha, Marcelo de Oliveira, 1973
Přispěvatelé: UNIVERSIDADE ESTADUAL DE CAMPINAS
Rok vydání: 2020
Předmět:
Zdroj: Repositório da Produção Científica e Intelectual da Unicamp
Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
Repositório Institucional da Unicamp
Popis: Agradecimentos: R.D.B. acknowledges funding by São Paulo Research Foundation-FAPESP, Grants No. 2016/24162-8 and No. 2019/02221-0. Authors thank the Brazilian agencies CNPq and CAPES for financial support. This work is part of the Brazilian National Institute for Science and Technology of Quantum Information (INCT-IQ). We thank Felippe Barbosa, János Bergou, Raphael Drumond, Rafael Rabelo, and Ana Belén-Sainz for fruitful discussions. Important clarifications were made thanks to anonymous referees. R.D.B. is thankful for the hospitality of IQOQI during the time as guest researcher in the institute Abstract: Contextuality is regarded as a nonclassical feature, challenging our everyday intuition; quantum contextuality is currently seen as a resource for many applications in quantum computation, being responsible for quantum advantage over classical analogs. In our work, we adapt the N-cycle scenarios with odd N to multiple independent observers which measure the system sequentially. We analyze the possibility of violating the inequalities as a function of the number of observers and under different measurement protocols. We then reinterpret the results as an open quantum system where the environment is divided into fragments. In this context, the results show the emergence of noncontextuality in such a setting, bringing together the quantum behavior to our classical experience. We then compare such emergence of noncontextuality with that of objectivity under the "environment as a witness" paradigm FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES Fechado
Databáze: OpenAIRE
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