Infrared effects in inflationary correlation functions

By D. Seery. 2010

203 citations recorded by the source corpus.

In this paper, I briefly review the status of infrared effects which occur when using inflationary models to calculate initial conditions for a subsequent hot, dense plasma phase. Three types of divergences have been identified in the literature: secular, ‘time-dependent’ logarithms, which grow with time spent outside the horizon; ‘box-cutoff’ logarithms, which encode a dependence on the infrared cutoff when calculating in a finite-size box; and ‘quantum’ logarithms, which depend on the ratio of a scale characterizing new physics to the scale of whatever process is under consideration, and whose interpretation is the same as the conventional field theory. I review the calculations in which these divergences appear, and discuss the methods which have been developed to deal with them.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/b5011a43d5761d6c8094bf86783808e7e2289d98

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In Astronomy and Astrophysics

1. D. Baumann
2. D. Green
3. Valentin Assassi
4. Yi Wang
5. L. Senatore
6. E. Pajer
7. M. Zaldarriaga
8. Liam McAllister

Citations in the corpus

• Symmetries and loops in inflation (2012, background): “[49–56]) and it would be interesting to see if our understanding of the conservation of ζ can shed any additional light on this other class of divergences.”