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Self-testing nonlocality without entanglement

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arxiv 2203.13171 v1 pith:GZ4JA2D4 submitted 2022-03-24 quant-ph

classification quant-ph
keywords nonlocalityquantumentanglementwithoutmeasurementsnetworkonlyself-testing
verification ladder T0 review T1 audit T2 compute T3 formal
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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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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Any gate of a quantum computer can be certified device-independently

    quant-ph 2025-08 conditional novelty 8.0 of 10

    A network-based protocol self-tests any finite-dimensional unitary quantum gate from observed correlations alone.

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