Oscillons after Inflation
Name
Amin-2012-Oscillons after Inflation.pdf
Size
806.6 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Amin, Mustafa Abdulkader
Easther, Richard
Finkel, Hal
Flauger, Raphael
Hertzberg, Mark Peter
Date Issued
June 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Amin, Mustafa et al. “Oscillons After Inflation.” Physical Review Letters 108.24 (2012): 241302. © 2012 American Physical Society.
Version
Final published version
Abstract
Oscillons are massive, long-lived, localized excitations of a scalar field. We show that in a class of well-motivated single-field models, inflation is followed by self resonance, leading to copious oscillon generation and a lengthy period of oscillon domination. These models are characterized by an inflaton potential which has a quadratic minimum and is shallower than quadratic away from the minimum. This set includes both string monodromy models and a class of supergravity inspired scenarios and is in good agreement with the current central values of the concordance cosmology parameters. We assume that the inflaton is weakly coupled to other fields so as not to quickly drain energy from the oscillons or prevent them from forming. An oscillon-dominated universe has a greatly enhanced primordial power spectrum on very small scales relative to that seen with a quadratic potential, possibly leading to novel gravitational effects in the early Universe.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.108.241302
