Couplers for Non-Locality Swapping
arXiv:0812.0758 · doi:10.1088/1367-2630/11/7/073014
Abstract
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.
16 pages, 3 figures
References in corpus (7)
- Device-independent security of quantum cryptography against collective attacks
- A generalized no-broadcasting theorem
- Non-locality distillation and post-quantum theories with trivial communication complexity
- Distilling Non-Locality
- Emergence of Quantum Correlations from Non-Locality Swapping
- Implausible Consequences of Superstrong Nonlocality
- Implications of Superstrong Nonlocality for Cryptography