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When can preheating affect the CMB?
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DOI：10.1016/S0370-2693(02)01813-0.png)
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摘要
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We discuss the principles governing the selection of inflationary models for which preheating can affect the CMB. This is a (fairly small) subset of those models which have nonnegligible entropy/isocurvature perturbations on large scales during inflation. We study new models which belong to this class-two-field inflation with negative nomninimal coupling and hybrid/double/supernatural inflation models where the tachyonic growth of entropy perturbations can lead to the variation of the curvature perturbation, R, on super-Hubble scales. Finally, we present evidence against recent claims for the variation of R in the absence of substantial super-Hubble entropy perturbations. (C) 2002 Elsevier Science B.V. All rights reserved.
Keyword:
PARAMETRIC AMPLIFICATION
METRIC PERTURBATIONS
MULTIFIELD INFLATION
PARTICLE-PRODUCTION
ART.
UNIVERSE
FLUCTUATIONS
GRAVITY
HORIZON
VACUUM
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期刊
IF:
4.5
论文数:
3.2W
被引数:
7.3W
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