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Hybrid inflation and waterfall field in string theory from D7-branes

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We present an explicit string realisation of a cosmological inflationary scenario we proposed recently within the framework of type IIB flux compactifications in the presence of three magnetised D 7-brane… Click to show full abstract

We present an explicit string realisation of a cosmological inflationary scenario we proposed recently within the framework of type IIB flux compactifications in the presence of three magnetised D 7-brane stacks. Inflation takes place around a metastable de Sitter vacuum. The inflaton is identified with the volume modulus and has a potential with a very shallow minimum near the maximum. Inflation ends due to the presence of “waterfall” fields that drive the evolution of the Universe from a nearby saddle point towards a global minimum with tuneable vacuum energy describing the present state of our Universe.

Keywords: inflation waterfall; inflation; string theory; waterfall field; hybrid inflation; field string

Journal Title: Journal of High Energy Physics
Year Published: 2022

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