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Renormalization of the inflationary perturbations revisited
File(s)
Author(s)
Markkanen, TT
Type
Journal Article
Abstract
In this work we clarify aspects of renormalization on curved backgrounds focussing on the potential ramifications on the amplitude of inflationary perturbations. We provide an alternate view of the often used adiabatic prescription by deriving a correspondence between the adiabatic subtraction terms and traditional renormalization. Specifically, we show how adiabatic subtraction can be expressed as a set of counter terms that are introduced by redefining the bare parameters of the action. Our representation of adiabatic subtraction then allows us to easily find other renormalization prescriptions differing only in the finite parts of the counter terms. As our main result, we present for quadratic inflation how one may consistently express the renormalization of the spectrum of perturbations from inflation as a redefinition of the bare cosmological constant and Planck mass such that the observable predictions coincide with the unrenormalized result.
Date Issued
2018-05-02
Date Acceptance
2018-04-15
Citation
Journal of Cosmology and Astroparticle Physics, 2018, 2018
URI
DOI
ISSN
1475-7516
Publisher
IOP Publishing
Journal / Book Title
Journal of Cosmology and Astroparticle Physics
Volume
2018
Copyright Statement
© 2018 IOP Publishing Ltd and Sissa Medialab. This is an author-created, un-copyedited version of an article accepted for publication in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at http://iopscience.iop.org/article/10.1088/1475-7516/2018/05/001/meta
Sponsor
Science and Technology Facilities Council (STFC)
Grant Number
ST/J000353/1
Subjects
hep-th
astro-ph.CO
gr-qc
0201 Astronomical And Space Sciences
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Nuclear & Particles Physics
Publication Status
Published