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Semi-device-independent certification of entanglement in superdense coding

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Autor(es):
Moreno, George ; Nery, Ranieri ; de Gois, Carlos ; Rabelo, Rafael ; Chaves, Rafael
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: PHYSICAL REVIEW A; v. 103, n. 2, p. 11-pg., 2021-02-25.
Resumo

Superdense coding is a paradigmatic protocol in quantum information science, employing a quantum communication channel to send classical information more efficiently. As we show here, it can be understood as a particular case of a prepare and measure experiment, a scenario that has attracted growing attention for its fundamental and practical applications. Formulating superdense coding as a prepare and measure scenario allows us to provide a semi-device-independent witness of entanglement that significantly improves over previous tests. Furthermore, we also show how to adapt our results into self-testing of maximally entangled states and also provide a semidefinite program formulation allowing one to efficiently optimize, for any shared quantum state, the probability of success in the superdense coding protocol. (AU)

Processo FAPESP: 18/07258-7 - Emaranhamento, não-localidade de Bell, e princípios físicos para a teoria quântica
Beneficiário:Rafael Luiz da Silva Rabelo
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores