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Perturbations in inflationary cosmologies with smooth exit (1998)

Tilley, Daniel ; Maartens, Roy

College Park, Md. : American Institute of Physics (AIP)

Journal of Mathematical Physics 39 (1998), S. 5491-5501

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ISSN: 1089-7658

Source: AIP Digital Archive

Topics: Mathematics , Physics

Notes: We give a comprehensive analysis of how scalar and tensor perturbations evolve in cosmologies with a smooth transition from power-law-like and de Sitter-like inflation to a radiation era. Analytic forms for the superhorizon and subhorizon perturbations in the inflationary and radiation dominated eras are found. © 1998 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.532546

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Exact Perturbations for Inflation with Smooth Exit (1998)

Maartens, Roy ; Tilley, Daniel

Springer

General relativity and gravitation 30 (1998), S. 289-297

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ISSN: 1572-9532

Keywords: COSMOLOGY ; INFLATION ; COSMOLOGICAL PERTURBATIONS

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: 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.