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Path integral for multi-field inflation

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Title
Path integral for multi-field inflation
Author(s)
Gong J.-O.; Min-Seok Seo; Shiu G.
Publication Date
2016-07
Journal
JOURNAL OF HIGH ENERGY PHYSICS, v.2016, no.7, pp.99 -
Publisher
SPRINGER
Abstract
Abstract: We develop the path integral formalism for studying cosmological perturbations in multi-field inflation, which is particularly well suited to study quantum theories with gauge symmetries such as diffeomorphism invariance. We formulate the gauge fixing conditions based on the Poisson brackets of the constraints, from which we derive two convenient gauges that are appropriate for multi-field inflation. We then adopt the in-in formalism to derive the most general expression for the power spectrum of the curvature perturbation including the corrections from the interactions of the curvature mode with other light degrees of freedom. We also discuss the contributions of the interactions to the bispectrum. © 2016, The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/2747
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
Files in This Item:
Jinn-Ouk Gong, Min-Seok Seo, Gary Shiu_1603.03689.pdfDownload

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