A short introduction to the fate of the alpha-vacuum
arXiv:hep-th/0312144 · doi:10.1142/9789812702340_0035
Abstract
A free scalar field propagating in de Sitter space has a one parameter family of invariant states called the alpha-vacua. In an interacting theory, all except a unique state, the Bunch-Davies vacuum, produce non-renormalizable divergences. This talk provides a brief introduction to the origin and the form of these divergences.
arXiv comment6 pages, 1 figure, talk given at the Quantum Theory and Symmetries Symposium, 2003