Graceful exit in extended inflation and implications for density perturbations

Robert Crittenden, Paul J. Steinhardt

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Two qualitatively different modes of ending superluminal expansion are possible in extended inflation. One mode, different from the one envoked in most extended models to date, easily avoids making big bubbles that distort the cosmic microwave background radiation (CMBR). In this mode, the spectrum of density fluctuations is found to be scale-free, P(k) ∝ kn, where n might lie anywhere between 0.5 and 1.0 (whereas, previously, it appeared that the range 1.0>n{greater-than or approximate}0.84 was disallowed).

Original languageEnglish (US)
Pages (from-to)32-36
Number of pages5
JournalPhysics Letters B
Issue number1-2
StatePublished - Oct 22 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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