Adiabatic regularisation of power spectra in κ-inflation

Journal article

Alinea, Allan L., Kubota, Takahiro, Nakanishi, Yukari and Naylor, Wade. (2015). Adiabatic regularisation of power spectra in κ-inflation. Journal of Cosmology and Astroparticle Physics. 2015(6), pp. 1-17. https://doi.org/10.1088/1475-7516/2015/06/019
AuthorsAlinea, Allan L., Kubota, Takahiro, Nakanishi, Yukari and Naylor, Wade
Abstract

We look at the question posed by Parker et al. about the effect of UV regularisation on the power spectrum for inflation. Focusing on the slow-roll k-inflation, we show that up to second order in the Hubble and sound flow parameters, the adiabatic regularisation of such model leads to no difference in the power spectrum apart from certain cases that violate near scale-invariant power spectra. Furthermore, extending to non-minimal k-inflation, we establish the equivalence of the subtraction terms in the adiabatic regularisation of the power spectrum in Jordan and Einstein frames.

Keywordsinflation; quantum field theory on curved space; CMBR theory
Year2015
JournalJournal of Cosmology and Astroparticle Physics
Journal citation2015 (6), pp. 1-17
PublisherInstitute of Physics Publishing
ISSN1475-7516
Digital Object Identifier (DOI)https://doi.org/10.1088/1475-7516/2015/06/019
Scopus EID2-s2.0-84937932842
Page range1-17
Publisher's version
License
All rights reserved
File Access Level
Controlled
Output statusPublished
Publication dates
Online10 Jun 2015
Publication process dates
Accepted25 May 2015
Deposited27 Jun 2023
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