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Consistency relations in multi-field inflation

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Title
Consistency relations in multi-field inflation
Author(s)
Jinn-Ouk Gong; Min-Seok Seo
Publication Date
2018-02
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v., no.2, pp.008 -
Publisher
IOP PUBLISHING LTD
Abstract
We study the consequences of spatial coordinate transformation in multi-field inflation. Among the spontaneously broken de Sitter isometries, only dilatation in the comoving gauge preserves the form of the metric and thus results in quantum-protected Slavnov-Taylor identities. We derive the corresponding consistency relations between correlation functions of cosmological perturbations in two different ways, by the connected and one-particle-irreducible Green's functions. The lowest-order consistency relations are explicitly given, and we find that even in multi-field inflation the consistency relations in the soft limit are independent of the detail of the matter sector. © 2018 IOP Publishing Ltd and Sissa Medialab
URI
https://pr.ibs.re.kr/handle/8788114/4675
ISSN
1475-7516
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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