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The rapid-turn inflationary attractor · Around

2019

The rapid-turn inflationary attractor

Bjorkmo, Theodor

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We prove the existence of a general class of rapidly turning two-field inflationary attractors.

By only requiring a large, slowly varying turn rate, we solve the system completely without specifying any metric or potential, and prove the linear stability of the solution.
Several recently studied turning inflation models, including hyperinflation, side-tracked inflation, and a flat field-space model, turn out to be examples of this general class of attractor solutions.
Very rapidly turning models are of particular interest since they can be compatible with the swampland conjectures, and we show that the solutions further simplify in this limit.

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