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Title

All entangled pure quantum states violate the bilocality inequality
Authors
Gisin, Nicolas
Mei, Quanxin
Tavakoli, Armin
Renou, Marc Olivier
Brunner, Nicolas
Published in Physical Review A. 2017, vol. 96, no. 020304(R)
Abstract The nature of quantum correlations in networks featuring independent sources of entanglement remains poorly understood. Here, focusing on the simplest network of entanglement swapping, we start a systematic characterization of the set of quantum states leading to violation of the so-called "bilocality" inequality. First, we show that all possible pairs of entangled pure states can violate the inequality. Next, we derive a general criterion for violation for arbitrary pairs of mixed two-qubit states. Notably, this reveals a strong connection between the CHSH Bell inequality and the bilocality inequality, namely that any entangled state violating CHSH also violates the bilocality inequality. We conclude with a list of open questions.
Identifiers
arXiv: 1702.00333
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Article (333 Kb) - public document Free access
Structures
Faculté des sciences / Section de physique / Groupe de physique appliquée
Citation
(ISO format) 		GISIN, Nicolas et al. All entangled pure quantum states violate the bilocality inequality. In: Physical Review A, 2017, vol. 96, n° 020304(R). https://archive-ouverte.unige.ch/unige:124644

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Deposited on : 2019-10-21

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