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Stochastic inflation and dimensional reduction

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 03 Nov 2008Embargo end date: 01 Jan 2008 Germany Publisher:American Physical Society (APS)Journal:Physical Review D, volume 78 (issn: 1550-7998, eissn: 1550-2368, Copyright policy )
Authors: Kuehnel, Florian; Schwarz, Dominik;

doi: 10.1103/physrevd.78.103501 , 10.48550/arxiv.0805.1998

arXiv: http://arxiv.org/abs/0805.1998

Stochastic inflation and dimensional reduction

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

Country
Germany
Related Organizations
Keywords

High Energy Physics - Theory, High Energy Physics - Theory (hep-th), Astrophysics (astro-ph), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, General Relativity and Quantum Cosmology

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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
8
Average
Average
Average
Green
bronze
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