Operational framework for nonlocality
| Autor: | Antonio Acín, Rodrigo Gallego, Miguel Navascués, Lars Erik Würflinger |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
LOCC
Quantum Physics Theoretical computer science Computer science Information Theory General Physics and Astronomy FOS: Physical sciences Quantum entanglement Characterization (mathematics) Models Theoretical 01 natural sciences 010305 fluids & plasmas Quantum nonlocality Consistency (database systems) Multipartite Resource (project management) Quantum mechanics TheoryofComputation_LOGICSANDMEANINGSOFPROGRAMS 0103 physical sciences Quantum Theory Quantum information 010306 general physics Quantum Physics (quant-ph) |
| Zdroj: | Physical Review Letters |
| ISSN: | 0031-9007 |
| DOI: | 10.1103/PhysRevLett.109.070401 |
| Popis: | 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 $N\ensuremath{-}1$ 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 $N\ensuremath{-}1$ 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. |
| Databáze: | OpenAIRE |
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