Speaker: Matthew Pusey from Imperial College.

Title: The quantum state cannot be interpreted statistically

Abstract: What is the quantum state? One view is that a pure state is a physical property of system, much like position and momentum in classical mechanics. Another is that even a pure state has only a statistical significance, akin to a probability distribution in statistical mechanics. We use a particular family of measurements to show that it is difficult to maintain the latter view without rejecting the idea that quantum systems have any physical properties at all.