ON-LINE QLunch: Thor Gabelgaard Nielsen

Speaker: Thor Gabelgaard Nielsen

Title: A representation-theoretic approach to robust self-testing

Abstract: Device-independent self-testing is a useful tool for
characterising certain states and measurements hereupon in certain
situations, by just looking at the induced correlations. It is well-
known that several nonlocal games robustly self-tests their ideal
strategies, implying for such a game that there is essentially only a
single optimal strategy. In this talk I will present a framework using
group representations to prove robust self-testing of quantum systems.
I will furthermore discuss how this can be applied to two well-known
nonlocal games, namely CHSH and Magic Square.

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