Soft inflation

Andrew L. Berkin, Keiichi Maeda, Jun'Ichi Yokoyama

    Research output: Contribution to journalArticle

    70 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

    • Physics and Astronomy(all)

    Cite this

    Berkin, A. L., Maeda, K., & Yokoyama, JI. (1990). Soft inflation. Physical Review Letters, 65(2), 141-144.