Titel
Device-independent and semi-device-independent entanglement certification in broadcast Bell scenarios
Autor*in
Emanuel-Cristian Boghiu
Institute of Photonic Sciences
Flavien Hirsch
Institute for Quantum Optics and Quantum Information Vienna
Pei-Sheng Lin
National Cheng Kung University
... show all
Abstract
It has recently been shown that by broadcasting the subsystems of a bipartite quantum state, one can activate Bell nonlocality and significantly improve noise tolerance bounds for device-independent entanglement certification. In this work we strengthen these results and explore new aspects of this phenomenon. First, we prove new results related to the activation of Bell nonlocality. We construct Bell inequalities tailored to the broadcast scenario, and show how broadcasting can lead to even stronger notions of Bell nonlocality activation. In particular, we exploit these ideas to show that bipartite states admitting a local hidden-variable model for general measurements can lead to genuine tripartite nonlocal correlations. We then study device-independent entanglement certification in the broadcast scenario, and show through semidefinite programming techniques that device-independent entanglement certification is possible for the two-qubit Werner state in essentially the entire range of entanglement. Finally, we extend the concept of EPR steering to the broadcast scenario, and present novel examples of activation of the two-qubit isotropic state. Our results pave the way for broadcast-based device-independent and semi-device-independent protocols.
Stichwort
Statistical and Nonlinear PhysicsAtomic and Molecular Physics, and OpticsNuclear and High Energy PhysicsCondensed Matter Physics
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
SciPost Physics Core
Band
6
Ausgabe
2
ISSN
2666-9366
Erscheinungsdatum
2023
Publication
Stichting SciPost
Projekt
Kod / Identifikator
F7103
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
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