Inflation After Preheating

Details Inflation After Preheating Inflation After Preheating

2000-04-04

arxiv.org/abs/hep-ph/0004024v1

JHEP 0008:010,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 7 figures, JHEP

Scientific paper

10.1088/1126-6708/2000/08/010

Preheating after inflation may lead to nonthermal phase transitions with symmetry restoration. These phase transitions may occur even if the total energy density of fluctuations produced during reheating is relatively small as compared with the vacuum energy in the state with restored symmetry. As a result, in some inflationary models one encounters a secondary, nonthermal stage of inflation due to symmetry restoration after preheating. We review the theory of nonthermal phase transitions and make a prediction about the expansion factor during the secondary inflationary stage. We then present the results of lattice simulations which verify these predictions, and discuss possible implications of our results for the theory of formation of topological defects during nonthermal phase transitions.

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