Stochastic Inflation and Dimensional Reduction
General Relativity and Quantum Cosmology
2008-11-26 v3 Astrophysics
High Energy Physics - Theory
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.
Cite
@article{arxiv.0805.1998,
title = {Stochastic Inflation and Dimensional Reduction},
author = {Florian Kuhnel and Dominik J. Schwarz},
journal= {arXiv preprint arXiv:0805.1998},
year = {2008}
}
Comments
4 pages, 1 figure; v2: minor changes; v3: revised and extended