Reheating and thermalization in a simple scalar model

Details Reheating and thermalization in a simple scalar model Reheating and thermalization in a simple scalar model

1996-04-17

arxiv.org/abs/hep-ph/9604340v2

Phys.Rev. D54 (1996) 3745-3761

Physics

High Energy Physics

High Energy Physics - Phenomenology

Some changes in Introduction and Discussion, comparison with the Hartree--Fock results added. 37 pages, 2 postscript figures a

Scientific paper

10.1103/PhysRevD.54.3745

We consider a simple model for the Universe reheating, which consists of a single self--interacting scalar field in Minkowskian space--time. Making use of the existence of an additional small parameter proportional to the amplitude of the initial spatially homogeneous field oscillations, we show that the behavior of the field can be found reliably. We describe the evolution of the system from the homogeneous oscillations to the moment when thermalization is completed. We compare our results with the Hartree--Fock approximation and argue that some properties found for this model may be the common features of realistic theories.

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