IPMU Colloquium

Speaker: Alan Guth (MIT)
Title: Infinite Phase Space and the Two-Headed Arrow of Time
Date (JST): Fri, Oct 30, 2015, 13:30 - 15:00
Place: Lecture Hall
Abstract: Can an arrow of time develop in a system with time-reversal invariant laws, and no special initial conditions? Can fine-tuning be explained in the context of Hamiltonian evolution, even though Liouville's theorem implies that phase space volumes are preserved? I will argue that if there is an infinite available phase space for the system being described, the answer to both these question is unambiguously yes. I will also argue that there are serious problems that arise in any description of cosmology for which the available phase space is not infinite.
Seminar Video: [VIDEO]