Semidefinite tests for quantum network topologies
| dc.contributor.author | Åberg, Johan | |
| dc.contributor.author | Nery, Ranieri Vieira | |
| dc.contributor.author | Duarte, Cristhiano | |
| dc.contributor.author | Araújo, Rafael Chaves Souto | |
| dc.date.accessioned | 2025-05-27T17:44:46Z | |
| dc.date.available | 2025-05-27T17:44:46Z | |
| dc.date.issued | 2020-09-10 | |
| dc.description.resumo | Quantum networks play a major role in long-distance communication, quantum cryptography, clock synchronization, and distributed quantum computing. Generally, these protocols involve many independent sources sharing entanglement among distant parties that, upon measuring their systems, generate correlations across the network. The question of which correlations a given quantum network can give rise to remains almost uncharted. Here we show that constraints on the observable covariances, previously derived for the classical case, also hold for quantum networks. The network topology yields tests that can be cast as semidefinite programs, thus allowing for the efficient characterization of the correlations in a wide class of quantum networks, as well as systematic derivations of device-independent and experimentally testable witnesses. We obtain such semidefinite tests for fixed measurement settings, as well as parties that independently choose among collections of measurement settings. The applicability of the method is demonstrated for various networks, and compared with previous approaches. | pt_BR |
| dc.identifier.citation | ÅBERG, Johan ; NERY, Ranieri vieira; DUARTE, Cristhiano; ARAÚJO, Rafael Chaves Souto. Semidefinite Tests for Quantum Network Topologies. Physical Review Letters, v. 125, p. 110505, 2020. DOI 10.1103/PhysRevLett.125.110505. Disponível em: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.110505. Acesso em: 19 mar. 2025. | |
| dc.identifier.doi | 10.1103/PhysRevLett.125.110505 | |
| dc.identifier.issn | 1079-7114 | |
| dc.identifier.other | DOI 10.1103/PhysRevLett.125.110505 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/63675 | |
| dc.language | en | pt_BR |
| dc.language.iso | en | |
| dc.publisher | Physical Review Letters | pt_BR |
| dc.subject | Nonlocality | pt_BR |
| dc.subject | Não localidade | pt_BR |
| dc.subject | Quantum communication | pt_BR |
| dc.subject | Comunicação quântica | pt_BR |
| dc.subject | Quantum networks | pt_BR |
| dc.subject | Redes quânticas | pt_BR |
| dc.subject | Quantum simulation | pt_BR |
| dc.subject | Simulação quântica | pt_BR |
| dc.title | Semidefinite tests for quantum network topologies | pt_BR |
| dc.type | article | pt_BR |
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