Dear friends, On September 15th at 14:00 in D5.01 we'll have a guest seminar by Ryan Mark Samolis, a Master's student from the University of Zurich. Ryan will talk to us about contextuality; see the title and abstract below. Best regards, Will Schober title: Leifer’s Generalized Zeno Effect is a proof of Contextuality abstract: The field of quantum foundations probes the boundary between genuinely quantum and semi-classical phenomena. Modern hidden variable theories allow us to emulate aspects of quantum mechanics, like entanglement and uncertainty relations, previously attributed exclusively to quantum models. Contextuality, a generalization of Bell nonlocality, captures this essence of “quantum weirdness”. One way to prove contextuality for a given phenomenon involves showing measurement statistics cannot be reproduced by modern hidden variable models. This thesis concerns Zeno-type effects which involve performing frequent projective measurements to “freeze” the time evolution of a quantum state. Matthew Leifer recently argued the quantum Zeno effect only occurs in contextual models. We utilize a noncontextual model of operational process theories to find a probability bound of successfully freezing this evolution.