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Inflaton Condensate Fragmentation: Analytical Conditions and Application to α-Attractor Models

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Article number123537
<mark>Journal publication date</mark>30/06/2017
<mark>Journal</mark>Physical Review D
Issue number12
Number of pages5
Publication StatusPublished
<mark>Original language</mark>English


We study the stability of an inflaton condensate in the presence of attractive inflaton self-interactions, in order to determine analytical conditions on the self-interaction couplings under which the condensate undergoes fragmentation. As an application of our results, we consider the stability of the inflaton condensate in alpha-attractor inflation. We show that the stability of the condensate depends upon the value of a. For the T-model with n = 1, we find that it is unstable for alpha less than or similar to 10(-4). In this case it is expected that inflation will be followed by an oscillon-dominated era.

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© 2017 American Physical Society