Trapping effects on inflation

Wolung Lee, Kin Wang Ng, I. Chin Wang, Chun Hsien Wu

研究成果: 雜誌貢獻期刊論文同行評審

24 引文 斯高帕斯(Scopus)

摘要

We develop a Lagrangian approach based on the influence functional method so as to derive self-consistently the Langevin equation for the inflaton field in the presence of trapping points along the inflaton trajectory. The Langevin equation exhibits the backreaction and the fluctuation-dissipation relation of the trapping. The fluctuation is induced by a multiplicative colored noise that can be identified as the particle number density fluctuations; and the dissipation is a new effect that may play a role in the trapping with a strong coupling. In the weak coupling regime, we calculate the power spectrum of the noise-driven inflaton fluctuations for a single trapping point and studied its variation with the trapping location. We also consider a case with closely spaced trapping points and find that the resulting power spectrum is blue.

原文英語
文章編號063527
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
84
發行號6
DOIs
出版狀態已發佈 - 2011 九月 30

ASJC Scopus subject areas

  • 核能與高能物理
  • 物理與天文學(雜項)

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