title: Large-scale suppression from stochastic inflation.
abstract: We show nonperturbatively that the power spectrum of a self-interacting scalar field in de Sitter space-time is strongly suppressed on large scales. The cutoff scale depends on the strength of the self-coupling, the number of e folds of quasi-de Sitter evolution, and its expansion rate. As a consequence, the two-point correlation function of field fluctuations is free from infrared divergencies.
authors.affiliation: Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany. kuehnel@physik.uni-bielefeld.de
authors.forename: Florian
authors.initials: F
authors.lastname: Kühnel
authors.forename: Dominik J
authors.initials: DJ
authors.lastname: Schwarz