2005/02/03 by Claus Kiefer
Physics and Astronomy · #gr-qc
published as Braz.J.Phys. 35 (2005) 296-299 · 10 pages, contribution to the Proceedings of the conference DICE2004, Piombino, Italy, September 2004
arxiv created 2005/02/03 · arxiv updated 2009/12/01
Although most fundamental laws are invariant under time reversal, experience exhibits the presence of irreversible phenomena -- the arrows of time. Their origin lies in cosmology, and I argue that only quantum cosmology can provide the appropriate formal framework. After briefly reviewing the formalism, I discuss how a simple and natural boundary condition can lead to the observed arrows of time. This yields at the same time interesting consequences for black holes.