期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.070401
关键词
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资金
- ERC starting grant PERCENT
- CHIST-ERA DIQIP project
- European EU FP7 Q-Essence project
- European EU FP7 QCS project
- CatalunyaCaixa
- Templeton Foundation
- [FIS2010-14830]
- Engineering and Physical Sciences Research Council [EP/J007838/1] Funding Source: researchfish
- EPSRC [EP/J007838/1] Funding Source: UKRI
- ICREA Funding Source: Custom
Because of 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.
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