Ricci subtraction for cosmological Coleman-Weinberg potentials

S. P. Miao, S. Park, R. P. Woodard

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We reconsider the fine-tuning problem of scalar-driven inflation arising from the need to couple the inflaton to ordinary matter in order to make reheating efficient. Quantum fluctuations of this matter induce Coleman-Weinberg corrections to the inflaton potential, depending (for de Sitter background) in a complex way on the ratio of the inflaton to the Hubble parameter. These corrections are not Planck-suppressed and cannot be completely subtracted because they are not even local for a general geometry. A previous study showed that it is not satisfactory to subtract a local function of just the inflaton and the initial Hubble parameter. This paper examines the other allowed possibility of subtracting a local function of the inflaton and the Ricci scalar. The problem in this case is that the new, scalar degree of freedom induced by the subtraction causes inflation to end almost instantly.

Original languageEnglish
Article number103503
JournalPhysical Review D
Issue number10
Publication statusPublished - 2019 Nov 4

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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