TY - JOUR
T1 - Mass density perturbations from inflation with thermal dissipation
AU - Lee, Wo-Lung
AU - Fang, Li Zhi
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999/4/15
Y1 - 1999/4/15
N2 - We study the power spectrum of the mass density perturbations in an inflation scenario that includes thermal dissipation. We show that the condition on which the thermal fluctuations dominate the primordial density perturbations can easily be realized even for weak dissipation, i.e., the rate of dissipation is less than the Hubble expansion. We find that our spectrum of primordial density perturbations follows a power law behavior, and exhibits a "thermodynamical" feature - the amplitude and power index of the spectrum depend mainly on the thermodynamical variable M, the inflation energy scale. Comparing this result with the observed temperature fluctuations of the cosmic microwave background, we find that both amplitude and index of the power spectrum can be fairly well fitted if M ∼ 1015-1016 GeV.
AB - We study the power spectrum of the mass density perturbations in an inflation scenario that includes thermal dissipation. We show that the condition on which the thermal fluctuations dominate the primordial density perturbations can easily be realized even for weak dissipation, i.e., the rate of dissipation is less than the Hubble expansion. We find that our spectrum of primordial density perturbations follows a power law behavior, and exhibits a "thermodynamical" feature - the amplitude and power index of the spectrum depend mainly on the thermodynamical variable M, the inflation energy scale. Comparing this result with the observed temperature fluctuations of the cosmic microwave background, we find that both amplitude and index of the power spectrum can be fairly well fitted if M ∼ 1015-1016 GeV.
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U2 - 10.1103/PhysRevD.59.083503
DO - 10.1103/PhysRevD.59.083503
M3 - Article
AN - SCOPUS:85037899456
VL - 59
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 0556-2821
IS - 8
ER -