Stochastic Inflation and Dimensional Reduction
arXiv:0805.1998 · doi:10.1103/PhysRevD.78.103501
Abstract
We present a replica field-theoretic approach to stochastic inflation in which a manifestation of dimensional reduction is found. The scale above which the latter dominates grows exponentially fast with time and thus affects largest super-horizon scales. We find inevitable modifications of the spectral index on those scales. An explicit relation between the noise correlator and the non-gaussianity parameter f_NL is found.
4 pages, 1 figure; v2: minor changes; v3: revised and extended
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Cited by in corpus (8)
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- Vacuum Fluctuations of a Scalar Field during Inflation: Quantum versus Stochastic Analysis
- Large-Scale Suppression from Stochastic Inflation
- Geometrically Consistent Approach to Stochastic DBI Inflation
- On Stochastic Effects and Primordial Black-Hole Formation
- Random field and random anisotropy O(N) spin systems with a free surface
- Stochastic Inflation and Replica Field Theory
- Non-equilibrium evolution of quantum fields during inflation and late accelerating expansion