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Lookup NU author(s): Lisa Hall, Professor Ian MossORCiD
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We present a numerical integration of the cosmological scalar perturbation equations in warm inflation. The initial conditions are provided by a discussion of the thermal fluctuations of an inflation field and thermal radiation using a combination of thermal field theory and thermodynamics. The perturbation equations include the effects of a damping coefficient Γ and a thermodynamic potential V. We give an analytic expression for the spectral index of scalar fluctuations in terms of a new slow-roll parameter constructed from Γ. A series of toy models, inspired by spontaneous symmetry breaking and a known form of the damping coefficient, lead to a spectrum with n s>1 on large scales and ns<1 on small scales.
Author(s): Hall LMH, Moss IG, Berera A
Publication type: Article
Publication status: Published
Journal: Physical Review D
Year: 2004
Volume: 69
Issue: 8
ISSN (print): 0556-2821
ISSN (electronic): 1089-4918
Publisher: American Physical Society
URL: http://dx.doi.org/10.1103/PhysRevD.69.083525
DOI: 10.1103/PhysRevD.69.083525
Notes: Article no. 083525 11 pages
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