Inflaton condensate fragmentation: Analytical conditions and application to α-attractor models

Inflaton condensate fragmentation: Analytical conditions and application to α-attractor models 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 α-attractor inflation. We show that the stability of the condensate depends upon the value of α. For the T-model with n=1, we find that it is unstable for α≲10-4. In this case it is expected that inflation will be followed by an oscillon-dominated era. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Inflaton condensate fragmentation: Analytical conditions and application to α-attractor models

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Inflaton condensate fragmentation: Analytical conditions and application to α-attractor models

Abstract

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 α-attractor inflation. We show that the stability of the condensate depends upon the value of α. For the T-model with n=1, we find that it is unstable for α≲10-4. In this case it is expected that inflation will be followed by an oscillon-dominated era.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.95.123537
Publisher site
See Article on Publisher Site

Abstract

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 α-attractor inflation. We show that the stability of the condensate depends upon the value of α. For the T-model with n=1, we find that it is unstable for α≲10-4. In this case it is expected that inflation will be followed by an oscillon-dominated era.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jun 15, 2017

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