Adiabatic Spectra During Slowly Evolving
High Energy Physics - Theory
2015-05-20 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
In general, for single field, the scale invariant spectrum of curvature perturbation can be given by either its constant mode or its increasing mode. We show that during slowly expanding or contracting, the spectrum of curvature perturbation given by its increasing mode can be scale invariance. The perturbation mode can be naturally extended out of horizon, and the amplitude of perturbation is consistent with the observations. We briefly discuss the implement of this scenario.
Cite
@article{arxiv.1012.2734,
title = {Adiabatic Spectra During Slowly Evolving},
author = {Yun-Song Piao},
journal= {arXiv preprint arXiv:1012.2734},
year = {2015}
}
Comments
3 pages, 1 figure, arguments, discussions and Refs. added, to publish in PLB