Monopole Inflation in Brans-Dicke Theory

Details Monopole Inflation in Brans-Dicke Theory Monopole Inflation in Brans-Dicke Theory

1998-11-07

arxiv.org/abs/gr-qc/9811024v2

Phys.Rev. D59 (1999) 103504

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, revtex, including figures, discussions in more general theories are added, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.59.103504

According to previous work, topological defects expand exponentially without an end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend the study of inflating topological defects to the Brans-Dicke gravity. With the help of numerical simulation we investigate the dynamics and spacetime structure of a global monopole. Contrary to the case of the Einstein gravity, any inflating monopole eventually shrinks and takes a stable configuration. We also discuss cosmological constraints on the model parameters.

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