KEK Theory Seminar (Prof. Tim Maudlin )
In the foundations of physics literature, the question is sometimes raised about whether one should--or even can--be a realist about the wavefunction. This query offers two targets for analysis and explication: "realist" and "wavefunction". The first term is used in many different ways, as is the second, and to get down to a non-trivial and sensible question one has to specify exactly what one has in mind. I will argue that given the only sensible and non-trivial way to make a clear question here, the indeed one ought to be a "realist" about the "wavefunction". There never should have been much controversy here, and the recent theorem by Pusey, Barrett and Rudolph settles the issue.