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We study, both numerically and analytically, the development of equilibrium after preheating. We show that the process is characterized by the appearance of Kolmogorov spectra and the evolution towards thermal equilibrium follows self-similar dynamics. Simplified kinetic theory gives values for all characteristic exponents which are close to what is observed in lattice simulations. The resulting time for thermalization is long, and temperature at thermalization is low, T approximately 100 eV in the simple lambdaPhi(4) inflationary model. Our results allow a straightforward generalization to realistic models.
Micha et al. (Mon,) studied this question.
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