Cosmic no-hair theorem in power-law inflation

Yuichi Kitada*, Kei Ichi Maeda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


We prove a cosmic no-hair theorem for Bianchi models in power-law inflation. Provided that the potential of an inflaton is exp(-) with 0<23, we find that the isotropic power-law solution is the unique attractor for any initially expanding Bianchi-type models except type IX. For Bianchi type IX, this conclusion is also true if the initial ratio of the vacuum energy to the maximum three-curvature is larger than one half.

Original languageEnglish
Pages (from-to)1416-1419
Number of pages4
JournalPhysical Review D
Issue number4
Publication statusPublished - 1992

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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