Entanglement swapping for generalized nonlocal correlations

Journal Article · Sun Jan 15 04:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20786633

Short, A J ^[1]; Popescu, S ^[1]; Gisin, N ^[2]

---

1. H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL (United Kingdom)
2. Group of Applied Physics, University of Geneva, 20 rue de l'Ecole-de-medecine, CH-1211 Geneva 4 (Switzerland)

We consider an analog of entanglement-swapping for a set of black boxes with the most general nonlocal correlations consistent with relativity (including correlations which are stronger than any attainable in quantum theory). In an attempt to incorporate this phenomenon, we consider expanding the space of objects to include not only correlated boxes, but 'couplers', which are an analog for boxes of measurements with entangled eigenstates in quantum theory. Surprisingly, we find that no couplers exist for two binary-input-binary-output boxes, and hence that there is no analog of entanglement swapping for such boxes.

• OSTI ID: 20786633
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
EIGENSTATES
ENERGY LEVELS
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS