Warm inflation and scalar perturbations of the metric
Mauricio Bellini (Universidad Nacional de Mar del Plata)
TL;DR
This paper develops a second-order quantum fluctuation expansion within warm inflation, linking matter field fluctuations to metric perturbations and calculating the power spectrum in the infrared sector.
Contribution
It introduces a semiclassical approach to expand friction and Hubble parameters, connecting matter fluctuations to metric curvature effects in warm inflation.
Findings
Derived the power spectrum of metric fluctuations in the infrared sector
Linked matter field fluctuations to curvature perturbations
Provided a second-order quantum fluctuation framework for warm inflation
Abstract
A second-order expansion for the quantum fluctuations of the matter field was considered in the framework of the warm inflation scenario. The friction and Hubble parameters were expended by means of a semiclassical approach. The fluctuations of the Hubble parameter generates fluctuations of the metric. These metric fluctuations produce an effective term of curvature. The power spectrum for the metric fluctuations can be calculated on the infrared sector.
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