Adiabatic Spectra During Slowly Evolving

Details Adiabatic Spectra During Slowly Evolving Adiabatic Spectra During Slowly Evolving

2010-12-13

arxiv.org/abs/1012.2734v2

Physics

High Energy Physics

High Energy Physics - Theory

3 pages, 1 figure, arguments, discussions and Refs. added, to publish in PLB

Scientific paper

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.

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