Generation of fluctuations during inflation: Comparison of stochastic and field-theoretic approaches

We prove that the stochastic and standard field-theoretical approaches produce exactly the same results for the amount of light massive scalar field fluctuations generated during inflation in the leading order of the slow-roll approximation. This is true both in the case for which this field is a te...

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Veröffentlicht in:	Physical review. D, Particles and fields Particles and fields, 2009-02, Vol.79 (4), Article 044007
Hauptverfasser:	Finelli, F., Marozzi, G., Starobinsky, A. A., Vacca, G. P., Venturi, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	APPROXIMATIONS COMPARATIVE EVALUATIONS DE SITTER GROUP FIELD THEORIES FLUCTUATIONS FOKKER-PLANCK EQUATION GAUGE INVARIANCE INFLATION PARTICLE PRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS SCALAR FIELDS STOCHASTIC PROCESSES
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