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

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

1999-11-10

arxiv.org/abs/astro-ph/9911189v1

Int.J.Mod.Phys. D8 (1999) 731-738

Astronomy and Astrophysics

Astrophysics

Accepted for publication, International Journal of Modern Physics, vol. 8 No.6 (Dec 1999)

Scientific paper

10.1142/S0218271899000547

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.

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