Inflation in multi-field random Gaussian landscapes

Ali Masoumi, Alexander Vilenkin, Masaki Yamada

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We investigate slow-roll inflation in a multi-field random Gaussian landscape. The landscape is assumed to be small-field, with a correlation length much smaller than the Planck scale. Inflation then typically occurs in small patches of the landscape, localized near inflection or saddle points. We find that the inflationary track is typically close to a straight line in the field space, and the statistical properties of inflation are similar to those in a one-dimensional landscape. This picture of multi-field inflation is rather different from that suggested by the Dyson Brownian motion model; we discuss the reasons for this difference. We also discuss tunneling from inflating false vacua to the neighborhood of inflection and saddle points and show that the tunneling endpoints tend to concentrate along the flat direction in the landscape.

本文言語English
論文番号035
ジャーナルJournal of Cosmology and Astroparticle Physics
2017
12
DOI
出版ステータスPublished - 2017 12 20
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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