Correlated perturbations from thermal dissipative inflation

Wolung Lee*, Li Zhi Fang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We study the primordial scalar perturbations in the thermal dissipative inflation where the thermal radiation persists and the density fluctuations are thermally originated. The perturbation generated in this model is hybrid, i.e., it consists of both adiabatic and isocurvature components. We find that the adiabatic and the isocurvature perturbations are correlated, even though the fluctuations of the radiation component is considered uncorrelated with that of the inftaton. Furthermore, the correlation depends mainly on the ratio between the dissipation coefficient γ and the Hubble parameter H during inflation and the predicted relation is consistent with the WMAP observation.

Original languageEnglish
Pages (from-to)S198-S202
JournalJournal of the Korean Physical Society
Issue numberSUPPL.
Publication statusPublished - 2004 Oct
Externally publishedYes


  • Primordial scalar perturbation
  • Thermal dissipative inflation

ASJC Scopus subject areas

  • General Physics and Astronomy


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