Inflation in string-inspired cosmology and suppression of CMB low multipoles

Yun Song Piao*, Shinji Tsujikawa, Xinmin Zhang

*この研究の対応する著者

研究成果: Article査読

47 被引用数 (Scopus)

抄録

We construct a string-inspired nonsingular cosmological scenario in which an inflaton field is driven up the potential before the graceful exit by employing a low-energy string effective action with an orbifold compactification. This sets up an initial condition for the inflaton to lead to a sufficient number of e-foldings and to generate a nearly scale-invariant primordial density perturbation during slow-roll inflation. Our scenario provides an interesting possibility to explain a suppressed power spectrum at low multipoles due to the presence of the modulus-driven phase prior to slow-roll inflation and thus can leave a strong imprint of extra dimensions in observed CMB anisotropies.

本文言語English
ページ(範囲)4455-4461
ページ数7
ジャーナルClassical and Quantum Gravity
21
18
DOI
出版ステータスPublished - 2004 9月 21
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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