論文

査読有り
2009年9月

Observational constraints of a power spectrum from superinflation in loop quantum cosmology

PHYSICAL REVIEW D
  • Masahiro Shimano
  • ,
  • Tomohiro Harada

80
6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.80.063538
出版者・発行元
AMER PHYSICAL SOC

In loop quantum cosmology there may be a superinflation phase in the very early universe, in which a single scalar field with a negative power-law potential V = -M(4)(phi/M)(beta) plays an important role. Since the effective horizon root SD/H controls the behavior of quantum fluctuation instead of the usual Hubble horizon, we assume the following inflation scenario: the superinflation starts when the quantum state of the scalar field emerges into the classical regime and ends when the effective horizon becomes the Hubble horizon, and the effective horizon scale never gets shorter than the Planck length. From consistency with the WMAP 5 yr data, we place a constraint on the parameters of the potential (beta and M) and the energy density at the end of the superinflation, depending on the volume correction parameter n.


リンク情報
DOI
https://doi.org/10.1103/PhysRevD.80.063538
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000270385200057&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevD.80.063538
  • ISSN : 1550-7998
  • Web of Science ID : WOS:000270385200057

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