Gravitational field of a hedgehog and the evolution of vacuum bubbles

E. I. Guendelman, A. Rabinowitz

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

The gravitational field produced by a spherically symmetric "hedgehog" configuration in scalar field theories with global SO(3) symmetry (or higher) is studied in the limit in which these models become nonlinear models. The same gravitational effect can be generated by a set of cosmic strings intersecting at a point, in the limit that one considers a continuous distribution of such intersecting strings in a spherically symmetric configuration (to be referred to as the "string hedgehog"). When the energy densities associated with the hedgehog are small, we obtain a static geometry, but for higher values, the resulting geometry is that of an anisotropic cosmology. The evolution of bubbles joining two phases, one of which contains a hedgehog (as defined above) is investigated. The role of such configurations in processes that lead to classical false-vacuum destabilization and in the evolution of inflationary bubbles is discussed. The generalization of our results to the gauged case, i.e., to magnetic-monopole hedgehogs, is discussed.

Original languageEnglish
Pages (from-to)3152-3158
Number of pages7
JournalPhysical Review D
Volume44
Issue number10
DOIs
StatePublished - 1 Jan 1991
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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