Quantum state of a nucleating bubble

Tanmay Vachaspati, Alexander Vilenkin

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


We consider a field theory consisting of two interacting scalar fields: and The scalar field is assumed to undergo a first-order phase transition via the nucleation of bubbles. We solve the Schrördinger equation for the combined system of a bubble plus the field with appropriate boundary conditions. This allows us to determine the quantum state of the field in the background of the nucleating and subsequently expanding bubble. The simplest description of this quantum state is obtained in the picture where is represented as an infinite set of massive scalar fields in a (2+1)-dimensional de Sitter space. We show that the bubble nucleates with all these fields in de Sitter-invariant quantum states and that the resulting quantum state of the field is Lorentz invariant.

Original languageEnglish (US)
Pages (from-to)3846-3855
Number of pages10
JournalPhysical Review D
Issue number12
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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