##### Infrared logarithms in minisuperspace inflation

Review articleOpen access###### Ali Kaya - No affiliation found

**2018/07/10**DOI: 10.1016/j.physletb.2018.05.045

*Short communication***Journal:**Physics Letters B

##### Abstract:

AbstractWe examine the emergence of the infrared logarithms in the cosmological perturbation theory applied to the minisuperspace scalar slow-roll inflation. Not surprisingly, in the single scalar field model the curvature perturbation ζ is conserved and no lnaB behavior appears, where aB(t) is the background scale factor of the universe. On the other hand, in the presence of a spectator scalar the n'th order perturbation theory gives an (lnaB)n correction to ζ. However, a nonperturbative estimate shows that ζ actually becomes the sum of a constant and a mildly evolving lnaB pieces.

Request full text