Entanglement Swapping and Quantum Correlations via Symmetric Joint Measurements
Entanglement Swapping and Quantum Correlations via Symmetric Joint Measurements
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通过对称联合测量的纠缠交换和量子相关性
DOI：
10.1103/physrevlett.129.030502
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发表时间：
2022-07-13
影响因子：
8.6
通讯作者：
Tavakoli, Armin
中科院分区：
文献类型：
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作者：
Huang, Cen-Xiao;Hu, Xiao-Min;Tavakoli, Armin
我们利用超纠缠实现了基于量子优雅联合测量的确定性纠缠交换。这些是两个量子比特在高度对称的等纠缠基底上的联合投影。我们报告的测量准确度不小于97.4%。我们展示了这些测量的应用，通过使用纠缠交换过程来证明量子相关性的形式证明的原则违反双局域贝尔不等式和更严格的相关标准对应于完整的网络非局域性。我们的研究结果是一个超越范例贝尔态测量的纠缠测量和非定域性的尝试，它们显示了更一般的测量在纠缠交换场景中的相关性。
We use hyperentanglement to experimentally realize deterministic entanglement swapping based on quantum elegant joint measurements. These are joint projections of two qubits onto highly symmetric, isoentangled 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.