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Title: Macroscopically local correlations can violate information causality
Authors: Cavalcanti, D. 
Salles, A.
Scarani, V. 
Issue Date: 2010
Citation: Cavalcanti, D., Salles, A., Scarani, V. (2010). Macroscopically local correlations can violate information causality. Nature Communications 1 (9) : -. ScholarBank@NUS Repository.
Abstract: Although quantum mechanics is a very successful theory, its foundations are still a subject of intense debate. One of the main problems is that quantum mechanics is based on abstract mathematical axioms, rather than on physical principles. Quantum information theory has recently provided new ideas from which one could obtain physical axioms constraining the resulting statistics one can obtain in experiments. Information causality (IC) and macroscopic locality (ML) are two principles recently proposed to solve this problem. However, none of them were proven to define the set of correlations one can observe. In this study, we show an extension of IC and study its consequences. It is shown that the two above-mentioned principles are inequivalent: if the correlations allowed by nature were the ones satisfying ML, IC would be violated. This gives more confidence in IC as a physical principle, defining the possible correlation allowed by nature. © 2010 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/ncomms1138
Appears in Collections:Staff Publications

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