Large N cosmology

Robert Brandenberger, Pei Ming Ho, Hsien Chung Kao

研究成果: 雜誌貢獻综述文章

14 引文 斯高帕斯(Scopus)

摘要

We motivate inflationary scenarios with many scalar fields, and give a complete formulation of adiabatic and entropy perturbations. We find that if the potential is very flat, or if the theory has a SO(N) symmetry, the calculation of the fluctuation spectrum can be carried out in terms of merely two variables without any further assumption. We do not have to assume slow roll or SO(N) invariance for the background fields. We give some examples to show that, even if the slow roll assumption holds, the spectrum of fluctuations can be quite different from the case when there is a single inflaton.

原文英語
頁(從 - 到)159-177
頁數19
期刊Journal of Cosmology and Astroparticle Physics
發行號11
DOIs
出版狀態已發佈 - 2004 十一月 1

    指紋

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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