Creating perturbations from a decaying field during inflation

Mazumdar, Anupam and Wang, Lingfei (2013) Creating perturbations from a decaying field during inflation. Physical Review D, 87 (8): 083501. ISSN 1550-7998

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Abstract

Typically the fluctuations generated from a decaying field during inflation do not contribute to the large scale structures. In this paper we provide an example where it is possible for a field which slowly rolls and then decays during inflation to create all the matter perturbations with a slightly red-tilted spectral index, with no isocurvature perturbations, and with a possibility of a departure from Gaussian fluctuations.