en
Scientific article
Open access
English

All entangled pure quantum states violate the bilocality inequality

Published inPhysical Review A, vol. 96, no. 020304(R)
Publication date2017
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.

Classification
  • arxiv : quant-ph
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). doi: 10.1103/PhysRevA.96.020304
Main files (1)
Article (Accepted version)
accessLevelPublic
Identifiers
278views
206downloads

Technical informations

Creation10/21/2019 11:00:00 AM
First validation10/21/2019 11:00:00 AM
Update time03/15/2023 6:12:58 PM
Status update03/15/2023 6:12:58 PM
Last indexation01/17/2024 6:34:23 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack