Soft Inflation: A Model for Easing Constraints

  • Andrew L. Berkin
  • Kei-Ichi Maeda
  • Jun’ichi Yokoyama
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 169)


The cosmology resulting from two coupled scalar fields, one which is either a new or chaotic type inflaton and the other which has an exponentially decaying potential, is studied. Such a potential arises in superstring theories and in the conformally transformed frame of generalized Einstein theories like the Jordan-Brans-Dicke theory. The constraints necessary for successful inflation are examined. Conventional GUT models such as SU(5) are compatible with new inflation, while restrictions on the self-coupling constant are significantly loosened for chaotic inflation when the exponential potential is fundamental, but no significant improvement for the latter occurs when in the conformal frame.


Density Perturbation Horizon Problem Exponential Potential Decay Potential Massive Scalar Field 
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  1. [1]
    A.L. Berkin, K. Maeda, and J. Yokoyama, Phys. Rev. Lett. 65, 141 (1990), and citations within.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1991

Authors and Affiliations

  • Andrew L. Berkin
    • 1
  • Kei-Ichi Maeda
    • 1
  • Jun’ichi Yokoyama
    • 2
  1. 1.Physics Dept.Waseda Univ.TokyoJapan
  2. 2.Dept. of Physics, Faculty of SciencesUniversity of TokyoTokyoJapan

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