Dynamics of Interacting Scalar Fields in Expanding Space-Time

Abstract

The effective equation of motion is derived for a scalar field interacting with other fields in a Friedman-Robertson-Walker background space-time. The dissipative behavior reflected in this effective evolution equation is studied both in simplified approximations as well as numerically. The relevance of our results to inflation are considered both in terms of the evolution of the inflaton field as well as its fluctuation spectrum. A brief examination also is made of supersymmetric models that yield dissipative effects during inflation.

36 pages, 12 figures. Version published in the Physical Review D

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Cited by in corpus (48)

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• Warm inflation model building
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• General dissipation coefficient in low-temperature warm inflation
• Power spectrum for inflation models with quantum and thermal noises
• Density fluctuations from warm inflation
• Shear viscous effects on the primordial power spectrum from warm inflation
• Non-gaussianity in fluctuations from warm inflation
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• Recent developments in warm inflation
• Asymptotic behavior of the warm inflation scenario with viscous pressure
• The warm inflationary universe
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• Warm inflationary model in loop quantum cosmology
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• Aspects of warm-flat directions
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• Inflation, modulation and baryogenesis with warm directions
• Warming up D3 brane motion in the background of D5 brane and Inflation