Tomohiro Matsuda 2004 Class. Quantum Grav. 21 L11 doi:10.1088/0264-9381/21/4/L02
Tomohiro Matsuda
Show affiliationsRecent arguments show that some curvaton field may generate the cosmological curvature perturbation. As the curvaton is independent of the inflaton field, there is a hope that the fine tunings of inflation models can be cured by the curvaton scenario. More recently, however, Lyth discussed that there is a strong bound for the Hubble parameter during inflation even if one assumes the curvaton scenario. Although the most serious constraint was evaded, the bound seems rather crucial for many models of a low inflation scale. In this paper we try to remove the constraint. We show that the bound is drastically modified if there were multiple stages of inflation.
Issue 4 (21 February 2004)
Received 22 October 2003
Published 7 January 2004
Tomohiro Matsuda 2004 Class. Quantum Grav. 21 L11
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