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Article Dans Une Revue Physical Review Letters Année : 2023

Characterizing the Nonlocal Correlations Created via Entanglement Swapping

Résumé

Quantum systems that have never interacted can become nonlocally correlated through a process called entanglement swapping. To characterize nonlocality in this context, we introduce local models where quantum systems that are initially uncorrelated are described by uncorrelated local variables. While a pair of maximally entangled qubits prepared in the usual way (i.e., emitted from a common source) requires a visibility close to 70% to violate a Bell inequality, we show that an entangled pair generated through entanglement swapping will already violate a Bell inequality for visibilities as low as 50% under our assumption.
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hal-03915153 , version 1 (22-03-2023)

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C. Branciard, N. Gisin, S. Pironio. Characterizing the Nonlocal Correlations Created via Entanglement Swapping. Physical Review Letters, 2023, 104 (17), pp.170401. ⟨10.1103/PhysRevLett.104.170401⟩. ⟨hal-03915153⟩
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