Infrared effects in inflationary correlation functions

Seery, David (2010) Infrared effects in inflationary correlation functions. Classical and Quantum Gravity, 27 (12). p. 124005. ISSN 0264-9381

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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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: David Seery
Date Deposited: 06 Feb 2012 21:25
Last Modified: 23 Jul 2012 13:50
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