Application of Gradient Expansion to Inflationary Universe
classification
🌌 astro-ph
gr-qc
keywords
inhomogeneityexpansiongradientinflationaryperturbationaffectsapplicationcomes
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Using the long wave perturbation scheme(gradient expansion), the effect of inhomogeneity on the inflationary phase is investigated. We solved the perturbation equation of which source term comes from inhomogeneity of a scalar field and a seed metric. The result indicates that sub-horizon scale inhomogeneity strongly affects the onset of inflation.
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