Curvature perturbation spectrum from false vacuum inflation

Research output: Contribution to journalConference articlepeer-review


In the inflationary cosmology it occurs frequently that the inflaton field is trapped in a local, transient minimum with nonzero vacuum energy. The difficulty regarding the curvature perturbation produced during such a stage is that classically the inflaton does not move so that the comoving hypersurfaces are not well defined at linear order in the scalar field perturbation. In this paper, assuming a mechanism of trapping which resembles a high temperature correction to the potential, we explicitly calculate for the first time the resulting power spectrum of the curvature perturbation by evaluating the quantum two-point correlation function directly. The spectrum is steeply blue with the spectral index nR = 4.

Original languageEnglish
Pages (from-to)518-520
Number of pages3
JournalAIP Conference Proceedings
StatePublished - 2008
Event16th International Conference on Supersymmetry and the Unification of Fundamental Interactions, SUSY08 - Seoul, Korea, Republic of
Duration: 16 Jun 200821 Jun 2008


  • Cosmological perturbation theory
  • Inflation


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