An operational framework for nonlocality

Rodrigo Gallego, Lars E. Würflinger, Antonio Acín, Miguel Navascués

Research output: Contribution to journalArticle (Academic Journal)peer-review


Due to the importance of entanglement for quantum information purposes, a framework has been developed for its characterization and quantification as a resource based on the following operational principle: entanglement among $N$ parties cannot be created by local operations and classical communication, even when $N-1$ parties collaborate. More recently, nonlocality has been identified as another resource, alternative to entanglement and necessary for device-independent quantum information protocols. We introduce an operational framework for nonlocality based on a similar principle: nonlocality among $N$ parties cannot be created by local operations and allowed classical communication even when $N-1$ parties collaborate. We then show that the standard definition of multipartite nonlocality, due to Svetlichny, is inconsistent with this operational approach: according to it, genuine tripartite nonlocality could be created by two collaborating parties. We finally discuss alternative definitions for which consistency is recovered.
Original languageUndefined/Unknown
JournalPhysical Review Letters
Publication statusPublished - 12 Dec 2011


  • quant-ph

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