Hi all, This week, our visitor, Pedro Barrios Hita, will talk about “Quantum mechanics based on real numbers: A consistent description”. See below for the abstract. The talk will take place at 11:15 in HIT E41.1. Best, Ladina %%%%%%%%%%%%%%%%% Title: Quantum mechanics based on real numbers: A consistent description Abstract: Complex numbers play a crucial role in quantum mechanics. However, their necessity remains debated: whether they are fundamental or merely convenient. Recently, it was shown that any real-number quantum theory satisfying certain postulates can be falsified with multipartite experiments. We show that a physically motivated postulate about composite quantum systems allows to construct quantum mechanics based on real numbers that reproduces predictions for all multipartite quantum experiments. Thus, we argue that real-valued quantum mechanics cannot be falsified, and therefore the use of complex numbers is a matter of convenience.