Entanglement swapping and quantum correlations via Elegant Joint Measurements

• URL: http://arxiv.org/abs/2203.16207v1
• Date: Wed, 30 Mar 2022 11:09:20 GMT
• Title: Entanglement swapping and quantum correlations via Elegant Joint Measurements
• Authors: Cen-Xiao Huang, Xiao-Min Hu, Yu Guo, Chao Zhang, Bi-Heng Liu, Yun-Feng Huang, Chuan-Feng Li, Guang-Can Guo, Nicolas Gisin, Cyril Branciard, Armin Tavakoli
• Abstract summary: We use hyper-entanglement to experimentally realize deterministic entanglement swapping based on quantum Elegant Joint Measurements. We report measurement fidelities no smaller than $97.4%$.
• Score: 5.252277280918264
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We use hyper-entanglement to experimentally realize deterministic entanglement swapping based on quantum Elegant Joint Measurements. These are joint projections of two qubits onto highly symmetric, iso-entangled, bases. We report measurement fidelities no smaller than $97.4\%$. We showcase the applications of these measurements by using the entanglement swapping procedure to demonstrate quantum correlations in the form of proof-of-principle violations of both bilocal Bell inequalities and more stringent correlation criteria corresponding to full network nonlocality. Our results are a foray into entangled measurements and nonlocality beyond the paradigmatic Bell state measurement and they show the relevance of more general measurements in entanglement swapping scenarios.

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