2017-09-04

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[[UTAPwiki/セミナー/初期宇宙・相対論速報]]
Speaker: Yuichiro Tada (IAP)
Title: Stochastic Formalism in Curved Field Space
Abstract:
In multi-field inflation scenarios, the scalar fields can span curved field spaces in general.
Recently it was pointed out that the sufficiently large field curvature can make the entropic
degrees of freedom tachyonic during inflation and alter the inflation dynamics [PRL117, 141301].
This geometrical destabilization can be applied to a large class of inflationary models.
To analyze the destabilization, we formalize the stochastic approach in the general curved
field space from first principles.
Also I’ll briefly mention the slow-roll phase well after the geometrical destabilization.

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