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On the fate of vacuum bubbles on matter backgrounds

✍ Scribed by A. Rakić; D. Simon; J. Adamek; J. Niemeyer

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
137 KB
Volume
19
Category
Article
ISSN
0003-3804

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✦ Synopsis

In this letter we discuss cosmological first order phase transitions with de Sitter bubbles nucleating on (inhomogeneous) matter backgrounds. The de Sitter bubble can be a toy model for an inflationary phase of universes like our own. Using the thin wall approximation and the Israel junction method we trace the classical evolution of the formed bubbles within a compound model. We first address homogeneous ambient space (FRW model) and already find that bubbles nucleated in a dust dominated background cannot expand. For an inhomogeneous dust background (LTB model) we describe cases with at least initially expanding bubbles. Yet, an ensuing passage of the bubble wall through ambient curvature inhomogeneities remains unnoticed for observers inside the bubble. Notable effects also for interior observers are found in the case of a rapid background phase transition in a FRW model.

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