The origin of scale-scale correlations of the density perturbations during inflation

Li Zhi Fang, Wolung Lee, Jesús Pando

Research output: Contribution to journalArticle

Abstract

We show that scale-scale correlations are a generic feature of slow-roll inflation theories. These correlations result from the long-time tails characteristic of the time dependent correlations because the long wavelength density perturbation modes are diffusion-like. A relationship between the scale-scale correlations and time-correlations is established providing a way to reveal the time correlations of the perturbations during inflation. This mechanism provides for a testable prediction that the scale-scale correlations at two different spatial points will vanish.

Original languageEnglish
Pages (from-to)731-738
Number of pages8
JournalInternational Journal of Modern Physics D
Volume8
Issue number6
DOIs
Publication statusPublished - 1999 Dec

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science

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