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Self-testing nonlocality without entanglement

Ivan Šupić, Nicolas Brunner

24/3/22 Published in : arXiv:2203.13171

Quantum theory allows for nonlocality without entanglement. Notably, there exist bipartite quantum measurements consisting of only product eigenstates, yet they cannot be implemented via local quantum operations and classical communication. In the present work, we show that a measurement exhibiting nonlocality without entanglement can be certified in a device-independent manner. Specifically, we consider a simple quantum network and construct a self-testing procedure. This result also demonstrates that genuine network quantum nonlocality can be obtained using only non-entangled measurements. From a more general perspective, our work establishes a connection between the effect of nonlocality without entanglement and the area of Bell nonlocality.

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  • Quantum Systems

Cosmology and modified gravity with dark sirens from GWTC-3

Entanglement swapping and quantum correlations via Elegant Joint Measurements

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