A new algorithm for calculating the curvature perturbations in stochastic inflation

Tomohiro Fujita, Masahiro Kawasaki, Yuichiro Tada, Tomohiro Takesako

研究成果: Article査読

36 被引用数 (Scopus)

抄録

We propose a new approach for calculating the curvature perturbations produced during inflation in the stochastic formalism. In our formalism, the fluctuations of the e-foldings are directly calculated without perturbatively expanding the inflaton field and they are connected to the curvature perturbations by the δN formalism. The result automatically includes the contributions of the higher order perturbations because we solve the equation of motion non-perturbatively. In this paper, we analytically prove that our result (the power spectrum and the nonlinearity parameter) is consistent with the standard result in single field slow-roll inflation. We also describe the algorithm for numerical calculations of the curvature perturbations in more general inflation models.

本文言語English
論文番号036
ジャーナルJournal of Cosmology and Astroparticle Physics
2013
12
DOI
出版ステータスPublished - 2013 12月
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

フィンガープリント

「A new algorithm for calculating the curvature perturbations in stochastic inflation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル