https://scholars.lib.ntu.edu.tw/handle/123456789/440600
標題: | Large N cosmology | 作者: | Brandenberger, R. PEI-MING HO |
關鍵字: | Cosmological perturbation theory; Inflation | 公開日期: | 2004 | 期: | 11 | 起(迄)頁: | 159-177 | 來源出版物: | Journal of Cosmology and Astroparticle Physics | 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. © 2004 IOP Publishing Ltd. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/440600 https://www.scopus.com/inward/record.uri?eid=2-s2.0-23244462661&doi=10.1088%2f1475-7516%2f2004%2f11%2f011&partnerID=40&md5=85030377213a399853a6a0a8f0cc04f1 |
ISSN: | 14757516 | DOI: | 10.1088/1475-7516/2004/11/011 |
顯示於: | 物理學系 |
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