2011-12-27

• バックアップ一覧
• 差分 を表示
• 現在との差分 を表示
• バックアップ を表示
• UTAPwiki/セミナー/初期宇宙・相対論速報/2011-12-27 へ行く。
  • 1 (2011-12-19 (月) 12:07:57)

Yuki Watanabe (ASC, LMU Munich) 

Title: δN versus covariant perturbative approach to non-Gaussianity
outside the horizon in multifield inflation

Abstract:
We compute the super-Hubble evolution of non-Gaussianity of primordial
curvature perturbations in two-field inflation models by employing two
formalisms: δN and covariant formalisms. Although two formalisms treat
the evolution of fluctuations radically different, we show that the
formulas of f_{NL} parameter agree quantitatively with each other
within 1 % accuracy. We also find that the amplitude of f_{NL} decays
no faster than a^{-3} as the inflationary trajectory reaches to the
adiabatic limit.