منابع مشابه
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We study the two field model for reheating based on the scalar inflaton field, φ, and its interaction with another scalar field, χ, through a Lagrangian term 1 2 gχφ,much investigated for parametric resonance or preheating. Attention is particularly on the quantum excitations of the inflaton field and the metric with a smooth transition from quantum to classical stochastic states, and with rehe...
متن کاملPost-inflationary Reheating
We study the two field model for reheating based on the scalar inflaton field, φ, and its interaction with another scalar field, χ, through a Lagrangian term 1 2 gχφ,much investigated for parametric resonance or preheating. Attention is particularly on the quantum excitations of the inflaton field and the metric with a smooth transition from quantum to classical stochastic states, and with rehe...
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At the end of the inflationary stage of the early universe, profuse particle production leads to the reheating of the universe. Such explosive particle production is due to parametric amplification of quantum fluctuations for the unbroken symmetry case (appropriate for chaotic inflation), or spinodal instabilities in the broken symmetry phase (which is the case in new inflation). This mechanism...
متن کاملReheating the Post Inflationary Universe
We consider the non-equilibrium evolution of the inflaton field coupled to both lighter scalars and fermions. The dissipational dynamics of this field is studied and found to be quite different than that believed in inflationary models. In particular, the damping time scale for the expectation value of the zero momentum mode of the inflaton can be much shorter than that given by the single part...
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Grand unified theories may display multiply interacting fields with strong coupling dynamics. This poses two new problems: (1) what is the nature of chaotic reheating after inflation, and (2) how is reheating sensitive to the mass spectrum of these theories ? We answer these questions in two interesting limiting cases and demonstrate an increased efficiency of reheating which strongly enhances ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2015
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.114.081303