Exact perturbations for inflation with smooth exit
نویسندگان
چکیده
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 vacuumand radiationdominated eras. The standard conserved quantity for super-horizon scalar perturbations is exactly constant for growing modes, and zero for decaying modes.
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Perturbations in inflationary cosmologies with smooth exit
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