Initial Conditions for Inflation
High Energy Physics - Theory
2009-11-07 v1 Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
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.
Cite
@article{arxiv.hep-th/0209231,
title = {Initial Conditions for Inflation},
author = {Nemanja Kaloper and Matthew Kleban and Albion Lawrence and Stephen Shenker and Leonard Susskind},
journal= {arXiv preprint arXiv:hep-th/0209231},
year = {2009}
}
Comments
31 pages, 4 figures