Everettian probabilities, the Deutsch-Wallace theorem and the Principal Principle

@inproceedings{Brown2020EverettianPT,
title={Everettian probabilities, the Deutsch-Wallace theorem and the Principal Principle},
author={H. Brown and Gal Ben Porath},
year={2020}
}

This paper is concerned with the nature of probability in physics, and in quantum mechanics in particular. It starts with a brief discussion of the evolution of Itamar Pitowsky’s thinking about probability in quantum theory from 1994 to 2008, and the role of Gleason’s 1957 theorem in his derivation of the Born Rule. Pitowsky’s defence of probability therein as a logic of partial belief leads us into a broader discussion of probability in physics, in which the existence of objective “chances” is… CONTINUE READING