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Infrared effects in inflationary correlation functions
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.
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Publication status
- Published
Journal
Classical and Quantum GravityISSN
0264-9381External DOI
Issue
12Volume
27Page range
124005Pages
30.0Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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