Couplers for Non-Locality Swapping

Details Couplers for Non-Locality Swapping Couplers for Non-Locality Swapping

2008-12-03

arxiv.org/abs/0812.0758v2

New Journal of Physics 11, 073014, (2009)

Physics

Quantum Physics

16 pages, 3 figures

Scientific paper

10.1088/1367-2630/11/7/073014

Studying generalized non-local theories brings insight to the foundations of quantum mechanics. Here we focus on non-locality swapping, the analogue of quantum entanglement swapping. In order to implement such a protocol, one needs a coupler that 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.

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