Topological Defect Inflation

Details Topological Defect Inflation Topological Defect Inflation

1999-12-31

arxiv.org/abs/gr-qc/9912121v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, latex, 6 ps figures included, talk given at 9th Workshop on General Relativity and Gravitation, Hiroshima, Nov 1999

Scientific paper

We address some issues of topological defect inflation. (1) We clarify the causal structure of an inflating magnetic monopole. The spacetime diagram shows explicitly that this model is free from the ``graceful exit'' problem, while the monopole itself undergoes ``eternal inflation''. (2) We extend the study of inflating topological defects to Brans-Dicke gravity. Contrary to the case of Einstein gravity, any inflating monopole eventually shrinks and takes a stable configuration. (3) We reanalyze chaotic inflation with a non-minimally coupled massive scalar field. We find a new solution of domain wall inflation, which relaxes constraints on the coupling constant for successful inflation.

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