The Many Worlds of Uncertainty

The status of the uncertainty relations varies between the different interpretations of quantum mechanics. The aim of the current paper is to explore their meanings within a certain neo-Everettian many worlds interpretation. We will also look at questions that have been linked with the uncertainty relations since Heisenberg's uncertainty principle: those of joint and repeated measurement of non-commuting (or otherwise `incompatible') observables. This will have implications beyond the uncertainty relations, as we will see the fundamentally different way in which statistical statements are interpreted in the neo-Everett theory that we use.