Abstract
Toy models for the Hubble rate or the scalar field potential have been used to analyze the amplification of scalar perturbations through a smooth transition from inflation to the radiation era. We use a Hubble rate that arises consistently from a decaying vacuum cosmology, which evolves smoothly from nearly de Sitter inflation to radiation domination. We find exact solutions for super-horizon perturbations (scalar and tensor), and for sub-horizon perturbations in the vacuum- and radiation-dominated eras. The standard conserved quantity for super-horizon scalar perturbations is exactly constant for the growing modes, and zero for the decaying modes.
Original language | English |
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Pages (from-to) | 289-297 |
Journal | General Relativity and Gravitation |
Volume | 30 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 1998 |
Keywords
- cosmology
- inflation
- cosmological perturbations