Infrared Logarithms in Minisuperspace Inflation - INSPIRE

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Infrared Logarithms in Minisuperspace Inflation

Ali Kaya
(
- Bogazici U.
)

Jan 6, 2018

6 pages

Published in:

Phys.Lett.B 782 (2018) 256-261

Published: Jul 10, 2018

e-Print:

1801.02034 [gr-qc]

DOI:

10.1016/j.physletb.2018.05.045

View in:

ADS Abstract Service

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Abstract: (Elsevier)

We 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 ln⁡aB 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 (ln⁡aB)n correction to ζ . However, a nonperturbative estimate shows that ζ actually becomes the sum of a constant and a mildly evolving ln⁡aB pieces.

Note:

v2: 15 pages, revtex4-1, comments and references added, to appear in Phys. Lett. B

inflation: slow-roll approximation
curvature: perturbation
field theory: scalar
perturbation theory
minisuperspace
infrared
conservation law
nonperturbative

References(22)

Figures(0)

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