TY - JOUR
T1 - Quantum correlations require multipartite information principles
AU - Gallego, Rodrigo
AU - Erik Würflinger, Lars
AU - Acín, Antonio
AU - Navascués, Miguel
N1 - Appendix added
PY - 2011/7/19
Y1 - 2011/7/19
N2 - Identifying which correlations among distant observers are possible within our current description of Nature, based on quantum mechanics, is a fundamental problem in Physics. Recently, information concepts have been proposed as the key ingredient to characterize the set of quantum correlations. Novel information principles, such as, information causality or non-trivial communication complexity, have been introduced in this context and successfully applied to some concrete scenarios. We show in this work a fundamental limitation of this approach: no principle based on bipartite information concepts is able to single out the set of quantum correlations for an arbitrary number of parties. Our results reflect the intricate structure of quantum correlations and imply that new and intrinsically multipartite information concepts are needed for their full understanding.
AB - Identifying which correlations among distant observers are possible within our current description of Nature, based on quantum mechanics, is a fundamental problem in Physics. Recently, information concepts have been proposed as the key ingredient to characterize the set of quantum correlations. Novel information principles, such as, information causality or non-trivial communication complexity, have been introduced in this context and successfully applied to some concrete scenarios. We show in this work a fundamental limitation of this approach: no principle based on bipartite information concepts is able to single out the set of quantum correlations for an arbitrary number of parties. Our results reflect the intricate structure of quantum correlations and imply that new and intrinsically multipartite information concepts are needed for their full understanding.
KW - quant-ph
U2 - 10.1103/PhysRevLett.107.210403
DO - 10.1103/PhysRevLett.107.210403
M3 - Article (Academic Journal)
C2 - 22181861
SN - 1079-7114
JO - Physical Review Letters
JF - Physical Review Letters
ER -