9 November 2019, 3pm, LPS seminar room

Jeff Barrett (Irvine), “Quantum Randomness and Underdetermination”

Abstract: We will consider the nature of quantum randomness and how one might have empirical evidence for it. We will see why, depending on one’s computational resources, it may be impossible to determine whether a particular notion of randomness properly characterizes one’s empirical data. Indeed, we will see why an ideal observer with full empirical evidence may fail to have any empirical evidence whatsoever for believing that the results of her quantum-mechanical experiments are in fact randomly determined. This illustrates a radical sort of empirical underdetermination faced by fundamentally stochastic theories like quantum mechanics.

————– Future Meetings—————–

7 December 2019, 3pm, LPS Seminar room

Mario Hubert (Cal-tech), “Why the Wave-Function has to be Psi-Ontic”

Abstract: The PBR-theorem aimed at proving that the wave-function has to represent objective features of a physical system. There have been many attempts to interpret the wave-function as not representing the objective physical state of a quantum system by abandoning one of the assumptions of the PBR-theorem. I argue that each theory that violates either of the assumptions meets unsurmountable problems. The most severe is to give up objective reality.