Cosmology is not a Renormalization Group Flow

Details Cosmology is not a Renormalization Group Flow Cosmology is not a Renormalization Group Flow

2008-05-20

arxiv.org/abs/0805.3089v2

Phys.Rev.Lett.101:081301,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, no figures, uses revtex4, version 2 revised slightly for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.101.081301

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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