Couplers for non-locality swapping

Paul Skrzypczyk*, Nicolas Brunner

*Corresponding author for this work

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

13 Citations (Scopus)

Abstract

Studying generalized non-signaling theories brings insight into the foundations of quantum mechanics. Here we focus on a dynamical process in such general theories, namely non-locality swapping, the analogue of quantum entanglement swapping. In order to implement such a protocol, one needs to define a coupler, which performs the equivalent of quantum joint measurements on generalized 'box-like' states. Establishing a connection to Bell inequalities, we define consistent couplers for theories containing an arbitrary amount of non-locality, which leads us to introduce the concepts of perfect and minimal couplers. Remarkably, Tsirelson's bound for quantum non-locality naturally appears in our study.

Original languageEnglish
Article number073014
Number of pages15
JournalNew Journal of Physics
Volume11
DOIs
Publication statusPublished - 3 Jul 2009

Keywords

  • QUANTUM NONLOCALITY
  • ENTANGLEMENT

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