Trapping effects on inflation

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

研究成果: 雜誌貢獻文章

22 引文 斯高帕斯(Scopus)


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.

期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
出版狀態已發佈 - 2011 九月 30


ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)