Multi-natural inflation in supergravity and BICEP2

Citations of this article
Mendeley users who have this article in their library.


We revisit the recently proposed multi-natural inflation and its realization in supergravity in light of the BICEP2 results. Multi-natural inflation is a single-field inflation model where the inflaton potential consists of multiple sinusoidal functions, and it is known that a sizable running spectral index can be generated, which relaxes the tension between the BICEP2 and the Planck results. In this paper we show that multi-natural inflation can accommodate a wide range of values of (n s, r), including the spectral index close to or even above unity. This will be favored if the tension is resolved by other sources such as dark radiation, hot dark matter, or non-zero neutrino mass. We also discuss the implications for the implementation in string theory. © 2014 The Authors.




Czerny, M., Higaki, T., & Takahashi, F. (2014). Multi-natural inflation in supergravity and BICEP2. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 734, 167–172.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free