Initial Conditions for Inflation

Details Initial Conditions for Inflation Initial Conditions for Inflation

2002-09-26

arxiv.org/abs/hep-th/0209231v1

JHEP 0211:037,2002

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, 4 figures

Scientific paper

10.1088/1126-6708/2002/11/037

Free scalar fields in de Sitter space have a one-parameter family of states invariant under the de Sitter group, including the standard thermal vacuum. We show that, except for the thermal vacuum, these states are unphysical when gravitational interactions are included. We apply these observations to the quantum state of the inflaton, and find that, at best, dramatic fine tuning is required for states other than the thermal vacuum to lead to observable features in the CMBR anisotropy.

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