Chaotic inflation in models with flat directions

Frank Graziani, Keith A Olive

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We consider the chaotic inflationary scenario in models with flat directions. We find that unless the scalars along the flat directions have vacuum expectation values 〈φ〉≲3Mpor 1014Mp≲〈φ〉≲1015Mp depending on the expectation values of the chaotic inflator, Ψ, one or two or more periods of inflation occur but with a resulting energy density perturbation δρ{variant}/ρ{variant}{reversed tilde equals}10-16, far too small to be of any consequence for galaxy formation. Even with 〈φ〉≲3-5 Mp only limited values of 〈Ψ〉{reversed tilde equals}(3-200)Mp result in inflation with reasonable density perturbations. Thus chaotic inflation in models with flat directions require rather special initial conditions.

Original languageEnglish (US)
Pages (from-to)31-36
Number of pages6
JournalPhysics Letters B
Volume216
Issue number1-2
DOIs
StatePublished - Jan 5 1989

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