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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:14040130  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Beyond local causality: causation and correlation after Bell
Speaker(s): Matthew Pusey
Abstract: There is now a remarkable mathematical theory of causation. But applying this theory to a Bell scenario implies the Bell inequalities, which are violated in experiment. We alleviate this tension by translating the basic definitions of the theory into the framework of generalised probabilistic theories. We find that a surprising number of results carry over: the d-separation criterion for conditional independence (the no-signalling principle on steroids), and even certain quantitative limits on correlations. Finally, we begin a classification of the causal structures, such as the Bell scenarios, that are "interesting" from this perspective. Joint work with Joe Henson and Raymond Lal.
Date: 08/04/2014 - 3:30 pm
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