Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 9, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2021/09/026
Keywords
inflation; physics of the early universe; string theory and cosmology; cosmology of theories beyond the SM
Funding
- JSPS KAKENHI [JP17H02894, JP17K18778, JP20H01902]
- Japanese Government (MEXT) Scholarship
- China Scholarship Council (CSC)
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The study indicates that destabilization of standard slow-roll inflation commonly occurs in multi-scalar-gauge field inflationary scenarios.
Hyperbolic inflation is an extension of the slow-roll inflation in multi-field models. We extend hyperbolic inflation by adding a gauge field and find four-type attractor solutions: slow-roll inflation, hyperbolic inflation, anisotropic slow roll inflation, and anisotropic hyperbolic inflation. We perform the stability analysis with the dynamical system method. We also study the transition behaviors of solutions between anisotropic slow roll inflation and anisotropic hyperbolic inflation. Our result indicates that destabilization of the standard slow-roll inflation ubiquitously occurs in multi-scalar-gauge field inflationary scenarios.
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