Explaining Large Electromagnetic Logarithms from Loops of Inflationary Gravitons
arXiv:2307.09386 · doi:10.1007/JHEP08(2023)195
Abstract
Recent progress on nonlinear sigma models on de Sitter background has permitted the resummation of large inflationary logarithms by combining a variant of Starobinsky's stochastic formalism with a variant of the renormalization group. We reconsider single graviton loop corrections to the photon wave function, and to the Coulomb potential, in light of these developments. Neither of the two 1-loop results have a stochastic explanation, however, the flow of a curvature-dependent field strength renormalization explains their factors of . We speculate that the factor of in the Coulomb potential should not be considered as a leading logarithm effect.
arXiv comment22 pages, uses LaTeX2e, slightly revised for publication
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