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Lookup NU author(s): Dr Chris Graham,
Professor Ian Moss
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Thermal fluctuations provide the main source of large scale density perturbations in warm inflationary models of the early universe. For the first time, general results are obtained for the power spectrum in the case when the friction coefficient in the inflaton equation of motion depends on temperature. A large increase in the amplitude of perturbations occurs when the friction coefficient increases with temperature. This has to be taken into account when constructing models of warm inflation. New results are also given for the thermal fluctuations in the weak regime of warm inflation when the friction coefficient is relatively small.
Author(s): Graham C, Moss IG
Publication type: Article
Publication status: Published
Journal: Journal of Cosmology and Astroparticle Physics
ISSN (print): 1475-7516
Publisher: Institute of Physics Publishing Ltd.
Notes: Article no. 013
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