Adiabatic Spectra During Slowly Evolving
arXiv:1012.2734 · doi:10.1016/j.physletb.2011.06.047
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.
3 pages, 1 figure, arguments, discussions and Refs. added, to publish in PLB
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- Note on the production of scale-invariant entropy perturbation in the Ekpyrotic universe
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- Non-singular Bounce from a Phase transition