Non-Gaussian signatures in the cosmic background radiation from warm inflation

S. Gupta*, A. Berera, A. F. Heavens, S. Matarrese

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We calculate the bispectrum of the gravitational field fluctuations generated during warm inflation, where dissipation of the vacuum potential during inflation is the mechanism for structure formation. The bispectrum is nonzero because of the self-interaction of the scalar field. We compare the predictions with those of standard, or "supercooled," inflationary models, and consider the detectability of these levels of non-Gaussianity in the bispectrum of the cosmic microwave background. We find that the levels of non-Gaussianity for warm and supercooled inflation are comparable, and overridden by the contribution to the bispectrum due to other physical effects. We also conclude that the resulting bispectrum values will be undetectable in the cosmic microwave background for both the MAP and Planck Surveyor satellites.

Original languageEnglish
Article number043510
JournalPhysical Review D, particles, fields, gravitation, and cosmology
Volume66
Issue number4
DOIs
Publication statusPublished - 2002

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