Correlated adiabatic and isocurvature perturbations from double inflation

Details Correlated adiabatic and isocurvature perturbations from double inflation Correlated adiabatic and isocurvature perturbations from double inflation

1999-06-04

arxiv.org/abs/astro-ph/9906080v1

Phys.Rev.D59:123512,1999

Astronomy and Astrophysics

Astrophysics

23 pages, 7 figures, RevTex. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.59.123512

It is shown that double inflation (two minimally coupled massive scalar fields) can produce correlated adiabatic and isocurvature primordial perturbations. Depending on the two relevant parameters of the model, the contributions to the primordial perturbations are computed, with special emphasis on the correlation, which can be quantitatively represented by a correlation spectrum. Finally the primordial spectra are evolved numerically to obtain the CMBR anisotropy multipole expectation values. It turns out that the existence of mixing and correlation can alter very significantly the temperature fluctuation predictions.

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