Nonperturbative infrared effects for light scalar fields in de Sitter space

Details Nonperturbative infrared effects for light scalar fields in de Sitter space Nonperturbative infrared effects for light scalar fields in de Sitter space

2011-11-29

arxiv.org/abs/1111.6754v2

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 3 figures, minor changes

Scientific paper

We study the phi^4 scalar field theory in de Sitter space by 2PI effective action formalism. This formalism enables us to investigate the nonperturbative quantum effects. We use the mean field and the gap equations and calculate the physical mass and effective potential. We find that nonperturbative infrared effects on de Sitter space produce a curvature-induced mass and work to restore the broken Z_2 symmetry.

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