論文

基本情報

氏名 山内 大介
氏名(カナ) ヤマウチ ダイスケ
氏名(英語) Yamauchi Daisuke
所属 理学部 物理学科
職名 講師
researchmap研究者コード B000327615
researchmap機関 岡山理科大学

題名

Multi-field open inflation model and multi-field dynamics in tunneling

単著・共著の別

共著

著者

Kazuyuki Sugimura, Daisuke Yamauchi, Misao Sasaki

概要

We consider a multi-field open inflation model, in which one of the fields dominates quantum tunneling from a false vacuum while the other field governs slow-roll inflation within the bubble nucleated from false vacuum decay. We call the former the tunneling field and the latter the inflaton field. In the limit of a negligible interaction between the two fields, the false vacuum decay is described by a Coleman-De Luccia instanton. Here we take into account the coupling between the two fields and construct explicitly a multi-field instanton for a simple quartic potential model. We also solve the evolution of the scalar fields within the bubble. We find our model realizes open inflation successfully. This is the first concrete, viable model of open inflation realized with a simple potential. We then study the effect of the multi-field dynamics on the false vacuum decay, specifically on the tunneling rate. We find the tunneling rate increases in general provided that the multi-field effect can be treated perturbatively.

発表雑誌等の名称

Journal of Cosmology and Astroparticle Physics

出版者

01

027

開始ページ

終了ページ

発行又は発表の年月

2012/01

査読の有無

有り

招待の有無

無し

記述言語

英語

掲載種別

研究論文(学術雑誌)

ISSN

ID:DOI

10.1088/1475-7516/2012/01/027

ID:NAID(CiNiiのID)

ID:PMID

URL

JGlobalID

arXiv ID

1110.4773

ORCIDのPut Code

DBLP ID