Dynamics of topological defects and inflation
نویسندگان
چکیده
منابع مشابه
Dynamics of topological defects and inflation.
We study the dynamics of topological defects in the context of “topological inflation” proposed by Vilenkin and Linde independently. Analysing the time evolution of planar domain walls and of global monopoles, we find that the defects undergo inflationary expansion if η > ∼ 0.33mP l, where η is the vacuum expectation value of the Higgs field and mP l is the Planck mass. This result confirms the...
متن کاملTopological defects and open inflation
Alexander Vilenkin Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, MA 02155, USA Topological defects can naturally be formed soon after bubble nucleation in the open inflation scenario. The defects are not completely diluted away by the subsequent period of inflation in the bubble interior and can produce observable large-scale microwave background anisot...
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Topological defects can be formed during inflation by phase transitions as well as by quantum nucleation. We study the effect of the expansion of the Universe on the internal structure of the defects. We look for stationary solutions to the field equations, i.e. solutions that depend only on the proper distance from the defect core. In the case of very thin defects, whose core dimensions are mu...
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We investigate the global structure of inflationary universe both by analytical methods and by computer simulations of stochastic processes in the early Universe. We show that the global structure of inflationary universe depends crucially on the mechanism of inflation. In the simplest models of chaotic inflation with the effective potentials φ or e the Universe looks like a sea of thermalized ...
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Hybrid inflation within supersymmetric grand unified theories, as well as inflation through brane collisions within braneworld cosmological models, lead to the formation of onedimensional defects. Observational data, mainly from the cosmic microwave background temperature anisotropies but also from the gravitational wave background, impose constraints on the free parameters of the models. I rev...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1996
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.53.655