Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.261301
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Funding
- Impuls und Vernetzungsfond of the Helmholtz Association of German Research Centres [HZ-NG-603]
- German Science Foundation (DFG) within the Collaborative Research Center [SFB 676]
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We propose a new field theory mechanism for generating an effective trans-Planckian decay constant from sub-Planckian ones. Using the minimal two axions and a hierarchy between two axion decay constants is sufficient for realizing inflation through nonperturbative effects only and with minimal tuning. The inflationary motion is kept entirely within a sub-Planckian domain. We outline possible strategies of embedding the model in a string theory setup.
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