Large N cosmology

Robert Brandenberger, Pei Ming Ho, Hsien Chung Kao*


研究成果: 雜誌貢獻回顧評介論文同行評審

14 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)159-177
期刊Journal of Cosmology and Astroparticle Physics
出版狀態已發佈 - 2004 11月

ASJC Scopus subject areas

  • 天文和天體物理學


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