Soft inflation

Andrew L. Berkin*, Kei Ichi Maeda, Juneichi Yokoyama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


We study the cosmology resulting from two coupled scalar fields, one which is either a new or chaotic-type inflaton and another which has an exponentially decaying potential. Such a potential may appear in the conformally transformed frame of generalized Einstein theories such as the Jordan-Brans-Dicke theory. The constraints necessary for successful inflation are examined. We find conventional grand unified theory models such as SU(5) are compatible with new inflation, while restrictions on the self-coupling constant are significantly loosened for chaotic inflation.

Original languageEnglish
Pages (from-to)141-144
Number of pages4
JournalPhysical Review Letters
Issue number2
Publication statusPublished - 1990

ASJC Scopus subject areas

  • General Physics and Astronomy


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