TY - JOUR
T1 - Scalar perturbation spectra from warm inflation
AU - Hall, Lisa M H
AU - Moss, Ian G.
AU - Berera, Arjun
PY - 2004
Y1 - 2004
N2 - 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 inflaton field and thermal radiation using a combination of thermal field theory and thermodynamics. The perturbation equations include the effects of a damping coefficient F 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.
AB - 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 inflaton field and thermal radiation using a combination of thermal field theory and thermodynamics. The perturbation equations include the effects of a damping coefficient F 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.
UR - http://www.scopus.com/inward/record.url?scp=2442653979&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.69.083525
DO - 10.1103/PhysRevD.69.083525
M3 - Article
AN - SCOPUS:2442653979
SN - 0556-2821
VL - 69
JO - Physical Review D, particles, fields, gravitation, and cosmology
JF - Physical Review D, particles, fields, gravitation, and cosmology
IS - 8
M1 - 083525
ER -