title: Quantum correlations require multipartite information principles.
abstract: 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 nontrivial 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 singleout 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.
authors.affiliation: ICFO-Institut de Ciències Fotòniques, Barcelona, Spain.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Gallego
authors.forename: Lars Erik
authors.initials: LE
authors.lastname: Würflinger
authors.forename: Antonio
authors.initials: A
authors.lastname: Acín
authors.forename: Miguel
authors.initials: M
authors.lastname: Navascués