Liberating the inflaton from primordial spectrum constraints

C. Armendáriz-Picón

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

I discuss an inflationary scenario where the spectral index of the seeded primordial spectrum is not directly determined by the nature of the inflationary stage. In particular, if a scalar field acquires an appropriate time-dependent mass, it is possible to generate an adiabatic, Gaussian scale invariant spectrum of density perturbations during any stage of inflation. As an illustration, I present a simple model where the time-dependent mass arises from the coupling of the inflaton to a second scalar. The mechanism I propose might help to implement a successful inflationary scenario in particle physics theories that do not yield slow-roll potentials.

Original languageEnglish (US)
Pages (from-to)139-151
Number of pages13
JournalJournal of Cosmology and Astroparticle Physics
Issue number3
DOIs
StatePublished - Mar 1 2004

Keywords

  • Inflation
  • Physics of the early universe
  • Quantum field theory on curved space

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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