A relativistic calculation of super-hubble suppression of inflation with thermal dissipation

Wolung Lee, Li Zhi Fang

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We investigated the evolution of the primordial density perturbations produced by inflation with thermal dissipation. A full relativistic analysis on the evolution of initial perturbations from the warm inflation era to a radiation-dominated universe has been developed. The emphasis is on tracking the ratio between the adiabatic and the isocurvature mode of the initial perturbations. This result is employed to calculate a testable factor: the super-Hubble suppression of the power spectrum of the primordial perturbations. We show that based on the warm inflation scenario, the super-Hubble suppression factor, s, for an inflation with thermal dissipation is at least 0.5. This prediction does not depend on the details of the model parameters. If s is larger than 0.5, it implies that the friction parameter Γ is larger than the Hubble expansion parameter H during the inflation era.

Original languageEnglish
Pages (from-to)4467-4480
Number of pages14
JournalClassical and Quantum Gravity
Volume17
Issue number21
DOIs
Publication statusPublished - 2000 Nov 7

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dissipation
retarding
perturbation
power spectra
friction
universe
expansion
radiation
predictions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

A relativistic calculation of super-hubble suppression of inflation with thermal dissipation. / Lee, Wolung; Fang, Li Zhi.

In: Classical and Quantum Gravity, Vol. 17, No. 21, 07.11.2000, p. 4467-4480.

Research output: Contribution to journalArticle

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