Fibre inflation and α-attractors

Renata Kallosh, Andrei Linde, Diederik Roest, Alexander Westphal, Yusuke Yamada*


研究成果: Article査読

21 被引用数 (Scopus)


Fibre inflation is a specific string theory construction based on the Large Volume Scenario that produces an inflationary plateau. We outline its relation to α-attractor models for inflation, with the cosmological sector originating from certain string theory corrections leading to α = 2 and α = 1/2. Above a certain field range, the steepening effect of higher-order corrections leads first to the breakdown of single-field slow-roll and after that to the onset of 2-field dynamics: the overall volume of the extra dimensions starts to participate in the effective dynamics. Finally, we propose effective supergravity models of fibre inflation based on an D3 ¯ uplift term with a nilpotent superfield. Specific moduli dependent D3 ¯ induced geometries lead to cosmological fibre models but have in addition a de Sitter minimum exit. These supergravity models motivated by fibre inflation are relatively simple, stabilize the axions and disentangle the Hubble parameter from supersymmetry breaking.

ジャーナルJournal of High Energy Physics
出版ステータスPublished - 2018 2月 1

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学


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