Cosmology is not a Renormalization Group Flow

R. P. Woodard (University of Florida)

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arxiv 0805.3089 v2 pith:7SFKRBUH submitted 2008-05-20 gr-qc astro-phhep-th

Cosmology is not a Renormalization Group Flow

R. P. Woodard (University of Florida) This is my paper

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keywords cosmologyflowgroupimplementationsrenormalizationappliedbackgroundcosmological

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A critical examination is made of two simple implementations of the idea that cosmology can be viewed as a renormalization group flow. Both implementations are shown to fail when applied to a massless, minimally coupled scalar with a quartic self-interaction on a locally de Sitter background. Cosmological evolution in this model is not driven by any RG screening of couplings but rather by inflationary particle production gradually filling an initially empty universe with a sea of long wavelength scalars.

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