English

An operational framework for nonlocality

Quantum Physics 2013-05-30 v1

Abstract

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 NN parties cannot be created by local operations and classical communication, even when N1N-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 NN parties cannot be created by local operations and allowed classical communication even when N1N-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.

Keywords

Cite

@article{arxiv.1112.2647,
  title  = {An operational framework for nonlocality},
  author = {Rodrigo Gallego and Lars E. Würflinger and Antonio Acín and Miguel Navascués},
  journal= {arXiv preprint arXiv:1112.2647},
  year   = {2013}
}
R2 v1 2026-06-21T19:49:59.113Z