4.6 Article

Aspects of geometric inflation

出版社

IOP Publishing Ltd
DOI: 10.1088/1475-7516/2020/12/040

关键词

alternatives to inflation; inflation; string theory and cosmology

资金

  1. MINECO [FPA2017-84436-P]
  2. Xunta de Galicia [ED431C 2017/07, ED481A-2019/115]
  3. FEDER
  4. Maria de Maeztu Unit of Excellence [MDM-2016-0692]
  5. Spanish MECD fellowship [FPU16/06675]

向作者/读者索取更多资源

We revisit the recently proposed mechanism of Geometric Inflation. On general grounds, we show that obtaining the right amount of inflation demands an exceedingly large initial energy density. We introduce a scalar field and study the combined action of both mechanisms. Besides fixing the aforementioned issue, a cascading process occurs whose last step seems undistinguishable from ordinary large field inflation. Strikingly, the scalar field remains approximately constant while Geometric Inflation rules the dynamics. This ultimately leads to the possibility of reducing the initial value of the scalar field and its excursion. We discuss the main features of this hybrid scenario.

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