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Trapping effects on inflation · Around

2011

Trapping effects on inflation

Lee, Wolung, Ng, Kin-Wang, Wang, I-Chin et al.

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We develop a Lagrangian approach based on the influence functional method so as to derive self-consistently the Langevin equation for the inflaton field in the presence of trapping points along the inflaton trajectory.

The Langevin equation exhibits the backreaction and the fluctuation-dissipation relation of the trapping.
The fluctuation is induced by a multiplicative colored noise that can be identified as the the particle number density fluctuations and the dissipation is a new effect that may play a role in the trapping with a strong coupling.
In the weak coupling regime, we calculate the power spectrum of the noise-driven inflaton fluctuations for a single trapping point and studied its variation with the trapping location.

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