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In spite of being more than 5 decades old, Bell's theorem is still at the center of quantum foundations, also playing a crucial role in the device-independent framework for quantum information processing. In this talk we will discuss some fresh results about Bell non-local correlations. First we introduce a natural and geometrical way to quantify non-locality. Based on that, we will see interesting concentration phenomena taking place in the set of Bell correlations. Finally, we will discuss something we have called quantum voids: regions on the faces of the non-signalling set (those compatible with special relativity) where all non-local correlations are of a post-quantum nature. By the end, and if time permits, we will see how deep learning techniques provide a novel tool to characterize and discover new kinds of non-local correlations.

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Rafael Chavez, IIP Natal, Brazil
Konferenzraum Theorie
Contact: David Gross