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Warm inflation in the adiabatic regime - A model, an existence proof for inflationary dynamics in quantum field theory

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)666-714
Number of pages49
JournalNuclear physics b
Volume585
Issue number3
DOIs
Publication statusPublished - 9 Oct 2000

Abstract

Warm inflation is examined in a multi-field model. Solutions are obtained for expansion e-folds and scalar density perturbations. Nonequilibrium dynamics is restricted to a regime that is displaced only slightly from thermal equilibrium and in which all macroscopic motion is adiabatic. In such a regime, nonequilibrium dynamics is well defined, provided macroscopic motions that displace the thermal equilibrium state occur sufficiently slow. The solution has adjustable parameters that permit observational consistency with respect to expansion e-folds and density perturbations in the full adiabatic regime, thus insuring a valid solution regime. For particle physics, the model is nonstandard since it requires a large number of fields, > 104. A particle physics/string interpretation of the model and solutions is discussed, which can accommodate the large field number requirement.

ID: 21742999