Cosmological Coleman-Weinberg potentials and inflation

J. H. Liao, S. P. Miao, R. P. Woodard

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14 引文 斯高帕斯(Scopus)

摘要

We consider an additional fine-tuning problem which afflicts scalar-driven models of inflation. The problem is that successful reheating requires the inflaton be coupled to ordinary matter, and quantum fluctuations of this matter induce Coleman-Weinberg potentials which are not Planck suppressed. Unlike the flat space case, these potentials depend upon a still-unknown, nonlocal functional of the metric which reduces to the Hubble parameter for de Sitter. Such a potential cannot be completely subtracted off by any local action. In a simple model we numerically consider one possible subtraction scheme in which the correction is locally subtracted at the beginning of inflation. For fermions the effect is to make the Universe approach de Sitter with a smaller Hubble parameter. For gauge bosons the effect is to make inflation end almost instantly unless the gauge charge is unacceptably small.

原文English
文章編號103522
期刊Physical Review D
99
發行號10
DOIs
出版狀態Published - 2019 5月 15

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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