Multi-field open ination and instanton

Kazuyuki Sugimura, Daisuke Yamauchi, Misao Sasaki

Research output: Contribution to conferencePaperpeer-review


In the open ination scenario, phase transition from false vacuum ination at a local minimum to slow-roll ination is mediated by the quantum tunneling. In this work, we present a concrete multi-field open ination model, explicitly showing how the bubble is nucleated by tunneling of scalar fields, and how slow-roll ination in the nucleated bubble follows. This model is the first viable open ination model with a simple potential. Multi-field tunneling is described by multi-field instanton method, which is an natural extension to the Coleman-De Luccia(CDL) instanton method. Evolution of the universe in the bubble obeys equations of motion for the open Friedmann- Lemaître-Robertson- Walker(FLRW) universe.

Original languageEnglish
Number of pages4
Publication statusPublished - 2011 Jan 1
Externally publishedYes
Event21st Workshop on General Relativity and Gravitation in Japan, JGRG 2011 - Sendai, Japan
Duration: 2011 Sept 262011 Sept 29


Other21st Workshop on General Relativity and Gravitation in Japan, JGRG 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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