Semi-device-independent certification of entanglement in superdense coding

Autor(es)

Moreno, George ; Nery, Ranieri ; de Gois, Carlos ; Rabelo, Rafael ; Chaves, Rafael

• 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