Application of gradient expansion to an inflationary universe

Yasusada Nambu, Atsushi Taruya

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Using the long-wave perturbation scheme (gradient expansion), the effect of inhomogeneity on the inflationary phase is investigated. We have solved the perturbation equation whose source term comes from inhomogeneity of a scalar field and a seed metric. The result indicates that a sub-horizon scale inhomogeneity strongly affects the onset of inflation.

Original languageEnglish
Pages (from-to)705-713
Number of pages9
JournalClassical and Quantum Gravity
Issue number4
Publication statusPublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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