Nonlinear decay of the inflaton, turbulence and thermalization

Details Nonlinear decay of the inflaton, turbulence and thermalization Nonlinear decay of the inflaton, turbulence and thermalization

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.1865p&link_type=abstract

In: The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF),

Physics

Chaos, General Relativity, Cosmology

Scientific paper

We study the nonlinear decay of the inflaton field with quartic potential, V(φ)=1/4λφ4, using the Galerkin projection method that provides a natural mode decomposition of the field in close analogy to a QFT treatment. Basically, we have shown that three distinct phases are definitely characterized according to the role of the nonlinear couplings in the dynamics, starting from the linear regime of parametric resonance towards a final turbulent phase dominated by the nonlinear effects and connected to the chaotic behavior of all modes, when the state of thermalization is accomplished.

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