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

Wolung Lee*, Li Zhi Fang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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
Issue number21
Publication statusPublished - 2000 Nov 7
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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