Inflation without Inflaton(s)
摘要
We propose a model for early universe cosmology without the need for fundamental scalar fields. Cosmic acceleration and phenomenologically viable reheating of the universe results from a series of energy transitions, where during each transition vacuum energy is converted to thermal radiation. We show that this `cascading universe' can lead to successful generation of adiabatic density fluctuations and an observable gravity wave spectrum in some cases, where in the simplest case it reproduces a spectrum similar to slow-roll models of inflation. We also find the model provides a reasonable reheating temperature after inflation ends. This type of model may also be relevant for addressing the smallness of the vacuum energy today.
引用
@article{arxiv.hep-th/0610054,
title = {Inflation without Inflaton(s)},
author = {Scott Watson and Malcolm J. Perry and Gordon L. Kane and Fred C. Adams},
journal= {arXiv preprint arXiv:hep-th/0610054},
year = {2008}
}
备注
13 pages, 4 figures, published version