Inflection points and the power spectrum Academic Article uri icon


  • Inflection point inflation generically includes a deviation from slow-roll when the inflaton approaches the inflection point. Such deviations are shown to be generated by transitions between singular trajectories. The effects on the power spectrum are studied within the context of universality classes for small-field models. These effects are shown to scale with universality parameters, and can explain the anomalously low power at large scales observed in the cosmic microwave background. The reduction of power is related to the inflection point's basin of attraction. Implications for the likelihood of inflation are discussed. 2013 American Physical Society.

published proceedings


altmetric score

  • 1.5

author list (cited authors)

  • Downes, S., & Dutta, B.

citation count

  • 15

complete list of authors

  • Downes, Sean||Dutta, Bhaskar

publication date

  • April 2013