Nucleation of thick topological defects during inflation

Details Nucleation of thick topological defects during inflation Nucleation of thick topological defects during inflation

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..46.2345b&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 46, Issue 6, 15 September 1992, pp.2345-2354

Physics

21

Particle-Theory And Field-Theory Models Of The Early Universe, Classical And Semiclassical Techniques

Scientific paper

Spherical domain-wall bubbles, circular loops of string, and monopole-antimonopole pairs can spontaneously nucleate in de Sitter space. Here we develop the formalism for finding the relevant instantons and obtain numerical solutions for the case of domain walls. We find that the instanton solutions exist only when the domain wall thickness δ is sufficiently small compared to the de Sitter horizon H-1. For our simple model, the maximum thickness is δmax=H-1/ √2 . The same phenomenon occurs for strings and monopoles. The regime where δ~=δmax is studied analytically and the value of δmax is calculated for all three types of defects.

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