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It is a relatively new insight of classical statistics that empirical data can contain information about causation rather than mere correlation. Within that context, during the past year we have developed and formalized a new research program for the study of causal relations in both the classical and quantum cases. In this presentation we will discuss two recent developments that highlight the very fruitful interplay between the causal inference literature and problems in quantum information, a connection which is increasingly appreciated among quantum physicists. We will describe a general algorithm for computing information-theoretic constraints on the correlations that can arise from a given causal structure, where we allow for quantum systems as well as classical random variables. In a second part, we will revisit nonlocality from a causal inference perspective and give an answer to the following question: How much do we need to relax the causal assumptions entering in Bell's theorem to classically explain nonlocal correlations?

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Rafael Chaves, Institute for Theoretical Physics, University of Cologne
TP seminar room 0.03
Contact: not specified