Almost quantum correlations

Miguel Navascués, Yelena Guryanova, Matty J. Hoban, Antonio Acín

Research output: Contribution to journalArticle (Academic Journal)

66 Citations (Scopus)

Abstract

There have been a number of attempts to derive the set of quantum non-local correlations from reasonable physical principles. Here we introduce $\tilde{Q}$, a set of multipartite supra-quantum correlations that has appeared under different names in fields as diverse as graph theory, quantum gravity and quantum information science. We argue that $\tilde{Q}$ may correspond to the set of correlations of a reasonable physical theory, in which case the research program to reconstruct quantum theory from device-independent principles is met with strong obstacles. In support of this conjecture, we prove that $\tilde{Q}$ is closed under classical operations and satisfies the physical principles of Non-Trivial Communication Complexity, No Advantage for Nonlocal Computation, Macroscopic Locality and Local Orthogonality. We also review numerical evidence that almost quantum correlations satisfy Information Causality.
Original language English Nature Communications https://doi.org/10.1038/ncomms7288 Published - 18 Mar 2014

Bibliographical note

15+2 pages, 1 figure

• quant-ph

Device-Independent Quantum Information Processing Principal

Popescu, S.

29/02/1228/02/15

Project: Research

Cite this

Navascués, M., Guryanova, Y., Hoban, M. J., & Acín, A. (2014). Almost quantum correlations. Nature Communications. https://doi.org/10.1038/ncomms7288