Characterizing the Nonlocal Correlations Created via Entanglement Swapping

2009/11/06 by Cyril Branciard, Nicolas Gisin, Stefano Pironio · 1 voice · 3 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.104.170401

arxiv published 2009/11/06 · arxiv updated 2009/11/06 · openalex publication_date 2010/04/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

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. This additional assumption leads to stronger tests of nonlocality. We show, in particular, that an entangled pair generated through entanglement swapping will already violate a Bell-type inequality for visibilities as low as 50% under our assumption.

Cited by

• Topologically noise robust network steering without inputs
• On whether quantum theory needs complex numbers: the foil theories perspective
• Nonlocality in Continuous-Variable Quantum Networks

Discussions

• Good question, but one that does not have a single satisfactory answer. You can approach this from a couple of angles. First, what would be the properties of this hypothetical particle/force? It would [stackexchange, 3 points]