Bilocal versus non-bilocal correlations in entanglement swapping experiments

Details Bilocal versus non-bilocal correlations in entanglement swapping experiments Bilocal versus non-bilocal correlations in entanglement swapping experiments

2011-12-19

arxiv.org/abs/1112.4502v1

Phys. Rev. A 85, 032119 (2012)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.85.032119

Entanglement swapping is a process by which two initially independent quantum systems can become entangled and generate nonlocal correlations. To characterize such correlations, we compare them to those predicted by bilocal models, where systems that are initially independent are described by uncorrelated states. We extend in this paper the analysis of bilocal correlations initiated in [Phys. Rev. Lett. 104, 170401 (2010)]. In particular, we derive new Bell-type inequalities based on the bilocality assumption in different scenarios, we study their possible quantum violations, and analyze their resistance to experimental imperfections. The bilocality assumption, being stronger than Bell's standard local causality assumption, lowers the requirements for the demonstration of quantumness in entanglement swapping experiments.

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